.. titel: Strømudtag og stik - NEMA Connector Guide
.. slug: strøm-udtag-og-stik
.. dato: 2026-01-26 12:00:00 UTC
.. tags: elektrisk, strøm, nema, stik, lommeregner, værktøj
.. kategori: Artikler
.. link:
.. beskrivelse: Interaktiv NEMA strømstikvisualisering, der viser stik/stik-par, ledningsdiagrammer og AWG-anbefalinger
.. type: tekst
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    .connector-notes {
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    .awg-table-section {
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        margin: 0 0 15px 0;
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        margin: 0;
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    .safety-note {
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    /* SVG Styling */
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    .slot {
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    .pin {
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        stroke-width: 1;
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    .terminal-label {
        font-size: 10px;
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        fill: #333;
        text-anchor: middle;
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    /* Wire diagram styling */
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    .wire-hot { stroke: #000000; }
    .wire-hot2 { stroke: #CC0000; }
    .wire-hot3 { stroke: #0066CC; }
    .wire-neutral { stroke: #CCCCCC; stroke-dasharray: none; }
    .wire-ground { stroke: #00AA00; }

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    /* Responsive */
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        }

        .wire-legend {
            flex-direction: column;
            align-items: flex-start;
        }
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</style>
<div class="nema-container">
<div class="tool-header">
<h2>NEMA Power Connector Guide</h2>
<p>Interaktiv visualisering af NEMA (National Electrical Manufacturers Association) strømstik. Se stik- og stikkonfigurationer, ledningsdiagrammer og elektriske specifikationer for nordamerikanske stikkontakter.</p>
<p><strong>Funktioner:</strong>37 NEMA konfigurationer med lige blade plus låsetyper, diagrammer til ansigtet, ledningsskemaer, AWG-trådmåleranbefalinger og sikkerhedsretningslinjer.</p>
</div>
<div class="control-section">
<div class="control-row">
<div class="control-group">
<label for="connectorType">Vælg NEMA-stiktype:</label>
<select id="connectorType">
<optgroup label="NEMA 1 - 125V 2-Wire (No Ground)">
<option value="1-15">NEMA 1-15 (125V 15A) - Legacy ujordet</option>
<option value="1-20">NEMA 1-20 (125V 20A) - Legacy ujordet</option>
<option value="1-30">NEMA 1-30 (125V 30A) - Legacy ujordet</option>
</optgroup>
<optgroup label="NEMA 2 - 250V 2-Wire (No Ground)">
<option value="2-15">NEMA 2-15 (250V 15A) - Legacy 240V</option>
<option value="2-20">NEMA 2-20 (250V 20A) - Legacy 240V</option>
<option value="2-30">NEMA 2-30 (250V 30A) - Legacy 240V</option>
</optgroup>
<optgroup label="NEMA 5 - 125V 3-Wire (Grounded)">
<option selected="" value="5-15">NEMA 5-15 (125V 15A) - Standard husstand</option>
<option value="5-20">NEMA 5-20 (125V 20A) - Køkken/badeværelse</option>
<option value="5-30">NEMA 5-30 (125V 30A) - Højstrøm 125V</option>
<option value="5-50">NEMA 5-50 (125V 50A) - Tungt udstyr</option>
</optgroup>
<optgroup label="NEMA 6 - 250V 3-Wire (Grounded)">
<option value="6-15">NEMA 6-15 (250V 15A) - Vindue AC</option>
<option value="6-20">NEMA 6-20 (250V 20A) - Stort AC/udstyr</option>
<option value="6-30">NEMA 6-30 (250V 30A) - Butiksudstyr</option>
<option value="6-50">NEMA 6-50 (250V 50A) - Svejser</option>
</optgroup>
<optgroup label="NEMA 7 - 277V 3-Wire (Commercial)">
<option value="7-15">NEMA 7-15 (277V 15A) - Kommerciel belysning</option>
<option value="7-20">NEMA 7-20 (277V 20A) - Kommerciel belysning</option>
<option value="7-30">NEMA 7-30 (277V 30A) - Kommerciel</option>
<option value="7-50">NEMA 7-50 (277V 50A) - Industriel</option>
</optgroup>
<optgroup label="NEMA 10 - 125/250V 3-Wire (Legacy Split-Phase)">
<option value="10-20">NEMA 10-20 (125/250V 20A) - Legacy</option>
<option value="10-30">NEMA 10-30 (125/250V 30A) - Legacy tørretumbler</option>
<option value="10-50">NEMA 10-50 (125/250V 50A) - Ældre rækkevidde</option>
</optgroup>
<optgroup label="NEMA 11 - 250V 3-Wire (3-Phase Delta)">
<option value="11-15">NEMA 11-15 (250V 15A) - 3-faset delta</option>
<option value="11-20">NEMA 11-20 (250V 20A) - 3-faset delta</option>
<option value="11-30">NEMA 11-30 (250V 30A) - 3-faset delta</option>
<option value="11-50">NEMA 11-50 (250V 50A) - 3-faset delta</option>
</optgroup>
<optgroup label="NEMA 14 - 125/250V 4-Wire (Modern Split-Phase)">
<option value="14-15">NEMA 14-15 (125/250V 15A) - Små apparater</option>
<option value="14-20">NEMA 14-20 (125/250V 20A) - Udstyr</option>
<option value="14-30">NEMA 14-30 (125/250V 30A) - Moderne tørretumbler</option>
<option value="14-50">NEMA 14-50 (125/250V 50A) - Rækkevidde/EV</option>
<option value="14-60">NEMA 14-60 (125/250V 60A) - Tungt udstyr</option>
</optgroup>
<optgroup label="NEMA 15 - 250V 4-Wire (3-Phase Delta + Ground)">
<option value="15-15">NEMA 15-15 (250V 15A) - 3-faset</option>
<option value="15-20">NEMA 15-20 (250V 20A) - 3-faset</option>
<option value="15-30">NEMA 15-30 (250V 30A) - 3-faset</option>
<option value="15-50">NEMA 15-50 (250V 50A) - 3-faset</option>
<option value="15-60">NEMA 15-60 (250V 60A) - 3-faset</option>
</optgroup>
<optgroup label="NEMA 18 - 120/208V 4-Wire (3-Phase Wye)">
<option value="18-15">NEMA 18-15 (120/208V 15A) - 3-faset wye</option>
<option value="18-20">NEMA 18-20 (120/208V 20A) - 3-faset wye</option>
<option value="18-30">NEMA 18-30 (120/208V 30A) - 3-faset wye</option>
<option value="18-50">NEMA 18-50 (120/208V 50A) - 3-faset wye</option>
<option value="18-60">NEMA 18-60 (120/208V 60A) - 3-faset wye</option>
</optgroup>
<optgroup label="Locking L5 (125V 3-wire)">
<option value="L5-15">NEMA L5-15 (125V 15A) - Let pligt</option>
<option value="L5-20">NEMA L5-20 (125V 20A) - Generelt formål</option>
<option value="L5-30">NEMA L5-30 (125V 30A) - Generator/RV</option>
<option value="L5-50">NEMA L5-50 (125V 50A) - Tungt udstyr</option>
</optgroup>
<optgroup label="Locking L6 (250V 3-wire)">
<option value="L6-15">NEMA L6-15 (250V 15A) - Lille udstyr</option>
<option value="L6-20">NEMA L6-20 (250V 20A) - Server PDU</option>
<option value="L6-30">NEMA L6-30 (250V 30A) - Industriel</option>
<option value="L6-50">NEMA L6-50 (250V 50A) - Tung industri</option>
</optgroup>
<optgroup label="Locking L7 (277V 3-wire)">
<option value="L7-15">NEMA L7-15 (277V 15A) - Kommerciel belysning</option>
<option value="L7-20">NEMA L7-20 (277V 20A) - Kommerciel belysning</option>
<option value="L7-30">NEMA L7-30 (277V 30A) - Kommerciel</option>
<option value="L7-50">NEMA L7-50 (277V 50A) - Industriel</option>
</optgroup>
<optgroup label="Locking L8 (480V 3-wire)">
<option value="L8-20">NEMA L8-20 (480V 20A) - Industriel</option>
<option value="L8-30">NEMA L8-30 (480V 30A) - Industriel</option>
</optgroup>
<optgroup label="Locking L9 (600V 3-wire)">
<option value="L9-20">NEMA L9-20 (600V 20A) - Tung industri</option>
<option value="L9-30">NEMA L9-30 (600V 30A) - Tung industri</option>
</optgroup>
<optgroup label="Locking L10 (125/250V 3-wire legacy)">
<option value="L10-20">NEMA L10-20 (125/250V 20A) - Legacy</option>
<option value="L10-30">NEMA L10-30 (125/250V 30A) - Legacy</option>
</optgroup>
<optgroup label="Locking L11 (250V 3φ Delta 3-wire)">
<option value="L11-15">NEMA L11-15 (250V 15A) - 3-faset ingen jord</option>
<option value="L11-20">NEMA L11-20 (250V 20A) - 3-faset ingen jord</option>
<option value="L11-30">NEMA L11-30 (250V 30A) - 3-faset uden jord</option>
</optgroup>
<optgroup label="Locking L14 (125/250V 4-wire)">
<option value="L14-20">NEMA L14-20 (125/250V 20A) - Lysudstyr</option>
<option value="L14-30">NEMA L14-30 (125/250V 30A) - Generatoroverførsel</option>
<option value="L14-50">NEMA L14-50 (125/250V 50A) - Tungt udstyr</option>
<option value="L14-60">NEMA L14-60 (125/250V 60A) - Industriel</option>
</optgroup>
<optgroup label="Locking L15 (250V 3φ Delta 4-wire)">
<option value="L15-20">NEMA L15-20 (250V 20A) - 3-faset</option>
<option value="L15-30">NEMA L15-30 (250V 30A) - 3-faset</option>
<option value="L15-50">NEMA L15-50 (250V 50A) - 3-faset</option>
<option value="L15-60">NEMA L15-60 (250V 60A) - 3-faset</option>
</optgroup>
<optgroup label="Locking L16 (480V 3φ Delta 4-wire)">
<option value="L16-20">NEMA L16-20 (480V 20A) - Industriel 3-faset</option>
<option value="L16-30">NEMA L16-30 (480V 30A) - Industriel 3-faset</option>
</optgroup>
<optgroup label="Locking L17 (600V 3φ Delta 4-wire)">
<option value="L17-30">NEMA L17-30 (600V 30A) - Tung industriel 3-faset</option>
</optgroup>
<optgroup label="Locking L18 (120/208V 3φ Wye 4-wire)">
<option value="L18-20">NEMA L18-20 (120/208V 20A) - 3-faset wye uden jord</option>
<option value="L18-30">NEMA L18-30 (120/208V 30A) - 3-faset wye uden jord</option>
</optgroup>
<optgroup label="Locking L19 (277/480V 3φ Wye 4-wire)">
<option value="L19-20">NEMA L19-20 (277/480V 20A) - Kommerciel 3-faset</option>
<option value="L19-30">NEMA L19-30 (277/480V 30A) - Kommerciel 3-faset</option>
</optgroup>
<optgroup label="Locking L20 (347/600V 3φ Wye 4-wire)">
<option value="L20-20">NEMA L20-20 (347/600V 20A) - Industriel 3-faset</option>
<option value="L20-30">NEMA L20-30 (347/600V 30A) - Industriel 3-faset</option>
</optgroup>
<optgroup label="Locking L21 (120/208V 3φ Wye 5-wire)">
<option value="L21-20">NEMA L21-20 (120/208V 20A) - Datacenter</option>
<option value="L21-30">NEMA L21-30 (120/208V 30A) - Datacenter</option>
</optgroup>
<optgroup label="Locking L22 (277/480V 3φ Wye 5-wire)">
<option value="L22-20">NEMA L22-20 (277/480V 20A) - Kommerciel 3-faset</option>
<option value="L22-30">NEMA L22-30 (277/480V 30A) - Kommerciel 3-faset</option>
</optgroup>
<optgroup label="Locking L23 (347/600V 3φ Wye 5-wire)">
<option value="L23-20">NEMA L23-20 (347/600V 20A) - Industriel 3-faset</option>
<option value="L23-30">NEMA L23-30 (347/600V 30A) - Industriel 3-faset</option>
</optgroup>
<optgroup label="RV/Travel Trailer">
<option value="TT-30">NEMA TT-30 (125V 30A) - RV parker</option>
</optgroup>
</select>
</div>
</div>
</div>
<div class="visualization-grid">
<div class="connector-panel">
<div class="panel-header receptacle">Beholder (udtag) - Ansigtsvisning</div>
<div class="panel-content">
<svg class="connector-svg" id="receptacleSvg" viewbox="0 0 220 220"></svg>
<div class="connector-label" id="receptacleLabel">Vægstikkontakt - slots accepterer stikben</div>
</div>
</div>
<div class="connector-panel">
<div class="panel-header plug">Stik (Han) - Ansigtsvisning</div>
<div class="panel-content">
<svg class="connector-svg" id="plugSvg" viewbox="0 0 220 220"></svg>
<div class="connector-label" id="plugLabel">Ledningsende - stifter indsættes i beholderen</div>
</div>
</div>
</div>
<div class="wiring-section">
<div class="wiring-header">Ledningsdiagram</div>
<div class="wiring-content">
<div class="wiring-diagram">
<svg class="wiring-svg" id="wiringSvg" viewbox="0 0 600 180"></svg>
</div>
<div class="wire-legend" id="wireLegend">
<div class="wire-item">
<div class="wire-color hot"></div>
<span>Hot (L1) - Sort</span>
</div>
<div class="wire-item">
<div class="wire-color neutral"></div>
<span>Neutral - Hvid</span>
</div>
<div class="wire-item">
<div class="wire-color ground"></div>
<span>Jord - Grøn/Bar</span>
</div>
</div>
</div>
</div>
<div class="specs-section">
<div class="specs-header">Elektriske specifikationer</div>
<div class="specs-content">
<div class="specs-grid" id="specsGrid">
<div class="spec-card">
<div class="spec-value" id="specVoltage">125V</div>
<div class="spec-label">Spænding</div>
</div>
<div class="spec-card">
<div class="spec-value" id="specAmperage">15A</div>
<div class="spec-label">Strømstyrke</div>
</div>
<div class="spec-card">
<div class="spec-value" id="specWires">3</div>
<div class="spec-label">Dirigenter</div>
</div>
<div class="spec-card">
<div class="spec-value" id="specAWG">14</div>
<div class="spec-label">AWG (standard)</div>
</div>
<div class="spec-card">
<div class="spec-value" id="specWattage">1.875W</div>
<div class="spec-label">Max Watt</div>
</div>
</div>
<div class="uses-list" id="usesList">
<h4>Almindelige applikationer:</h4>
<ul id="usesListItems">
<li>Standard husholdningsudtag</li>
<li>Mest almindelig i USA/Canada</li>
</ul>
</div>
<div class="connector-notes" id="connectorNotes" style="display: none;"></div>
<div class="awg-table-section">
<h4>AWG Wire Gauge Reference</h4>
<table class="awg-table">
<thead>
<tr>
<th>Strømstyrke</th>
<th>Standard (op til 50 fod)</th>
<th>Forlænget (50-100 fod)</th>
</tr>
</thead>
<tbody id="awgTableBody">
<tr><td>15A</td><td>14 AWG</td><td>12 AWG</td></tr>
<tr><td>20A</td><td>12 AWG</td><td>10 AWG</td></tr>
<tr><td>30A</td><td>10 AWG</td><td>8 AWG</td></tr>
<tr><td>40A</td><td>8 AWG</td><td>6 AWG</td></tr>
<tr><td>50A</td><td>6 AWG</td><td>4 AWG</td></tr>
<tr><td>60A</td><td>4 AWG</td><td>2 AWG</td></tr>
</tbody>
</table>
</div>
</div>
</div>
<div class="info-section">
<h3>Forstå NEMA Connector Navngivning</h3>
<p>NEMA-stikbetegnelser følger et standardmønster, der angiver spændingskonfiguration og strømstyrke.</p>
<table class="nema-code-table">
<thead>
<tr>
<th>Serie</th>
<th>Spænding</th>
<th>Ledninger</th>
<th>Beskrivelse</th>
</tr>
</thead>
<tbody>
<tr><td>1</td><td>125V</td><td>2</td><td>Ujordet (legacy)</td></tr>
<tr><td>2</td><td>250V</td><td>2</td><td>Ujordet 240V (legacy)</td></tr>
<tr><td>5</td><td>125V</td><td>3</td><td>Jordet - standard husstand</td></tr>
<tr><td>6</td><td>250V</td><td>3</td><td>Jordet 240V enfaset</td></tr>
<tr><td>7</td><td>277V</td><td>3</td><td>Kommerciel enfaset</td></tr>
<tr><td>10</td><td>125/250V</td><td>3</td><td>Split-fase uden jord (legacy)</td></tr>
<tr><td>11</td><td>250V</td><td>3</td><td>3-faset delta uden jord</td></tr>
<tr><td>14</td><td>125/250V</td><td>4</td><td>Split-faset med jord (moderne)</td></tr>
<tr><td>15</td><td>250V</td><td>4</td><td>3-faset delta med jord</td></tr>
<tr><td>18</td><td>120/208V</td><td>4</td><td>3-faset wye</td></tr>
<tr><td>L-præfiks</td><td>Forskellige</td><td>3-4</td><td>Låse (twist-lock) stik</td></tr>
</tbody>
</table>
<div class="info-grid">
<div class="info-card">
<h4>125V-konfigurationer (1, 5, L5)</h4>
<p>Standard husholdningsspænding. Hot tilsluttes til messingterminal, neutral til sølv, jord til grøn.</p>
</div>
<div class="info-card">
<h4>250V-konfigurationer (2, 6, L6)</h4>
<p>Enfaset 240V. To hots (ingen neutral), almindeligvis brugt til udstyr som svejsere og store AC-enheder.</p>
</div>
<div class="info-card">
<h4>125/250V-konfigurationer (10, 14, L14)</h4>
<p>Split-fase 240V med neutral. Giver både 120V og 240V. Bruges til ranges, tørretumblere, EV-opladere.</p>
</div>
<div class="info-card">
<h4>3-faset (11, 15, 18)</h4>
<p>Industriel og kommerciel magt. Delta (11, 15) eller Wye (18) konfigurationer til motorer og tungt udstyr.</p>
</div>
</div>
<div class="safety-note">
<h4>Sikkerhedsretningslinjer</h4>
<ul>
<li>Sluk altid for strømmen ved afbryderen, før du arbejder på elektriske forbindelser</li>
<li>Brug en passende ledningsmåler til kredsløbets strømstyrke og løbelængde</li>
<li>Brug aldrig en adapter til at tvinge inkompatible stik sammen</li>
<li>240V og 3-fasede kredsløb bør kun installeres af kvalificerede elektrikere</li>
<li>Jordforbindelser er kritiske for sikkerheden - udelad eller omgå dem aldrig</li>
<li>NEMA 1-, 2- og 10-serien (ujordet) er ældre - brug jordede ækvivalenter til nye installationer</li>
</ul>
</div>
</div>
</div>
<script src="https://d3js.org/d3.v7.min.js"></script>
<script>
'use strict';

/**
 * NEMA Power Connector Visualizer v2.0
 * Pattern-based drawing system for comprehensive NEMA connector support
 */

// ============================================================================
// PATTERN DEFINITIONS
// ============================================================================

const PATTERNS = {
    // 2-wire patterns (no ground)
    TWO_WIRE_VERTICAL: 'two_wire_vertical',
    TWO_WIRE_HORIZONTAL: 'two_wire_horizontal',

    // 3-wire patterns
    THREE_WIRE_VERTICAL: 'three_wire_vertical',       // 5-series: vertical slots + U ground
    THREE_WIRE_HORIZONTAL: 'three_wire_horizontal',   // 6-series: horizontal slots + U ground
    THREE_WIRE_MIXED: 'three_wire_mixed',             // 6-20: vertical + horizontal + ground
    THREE_WIRE_ANGLED: 'three_wire_angled',           // 6-50: angled slots + U ground
    THREE_WIRE_CROWFOOT: 'three_wire_crowfoot',       // 10-series: angled + L neutral
    THREE_WIRE_TANDEM: 'three_wire_tandem',           // 7-series: tandem horizontal
    THREE_WIRE_DELTA: 'three_wire_delta',             // 11-series: 3-phase delta

    // 4-wire patterns
    FOUR_WIRE_SPLIT: 'four_wire_split',               // 14-series: angled + vertical neutral + U ground
    FOUR_WIRE_DELTA: 'four_wire_delta',               // 15-series: 3-phase delta + ground
    FOUR_WIRE_WYE: 'four_wire_wye',                   // 18-series: 3-phase wye

    // Special patterns
    T_SLOT: 't_slot',                                 // 5-20 receptacle
    LOCKING: 'locking',                               // L-series
    TT_RV: 'tt_rv'                                    // TT-30 RV
};

// ============================================================================
// AWG LOOKUP
// ============================================================================

const AWG_TABLE = {
    15: { standard: '14', long: '12' },
    20: { standard: '12', long: '10' },
    30: { standard: '10', long: '8' },
    40: { standard: '8', long: '6' },
    50: { standard: '6', long: '4' },
    60: { standard: '4', long: '2' }
};

// ============================================================================
// CONNECTOR DATA - Pattern-based definitions
// ============================================================================

const nemaConnectors = {
    // NEMA 1 Series - 125V 2-Wire (No Ground)
    "1-15": {
        name: "NEMA 1-15", voltage: "125V", amperage: 15, wires: 2,
        pattern: PATTERNS.TWO_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { hotWidth: 6, neutralWidth: 8, hotHeight: 24, neutralHeight: 28, spacing: 35 },
        uses: ["Legacy ungrounded outlets", "Older homes (pre-1960s)", "2-prong appliances"],
        notes: "LEGACY - No ground connection. Not recommended for new installations."
    },
    "1-20": {
        name: "NEMA 1-20", voltage: "125V", amperage: 20, wires: 2,
        pattern: PATTERNS.TWO_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { hotWidth: 7, neutralWidth: 9, hotHeight: 26, neutralHeight: 30, spacing: 38, tSlot: true },
        uses: ["Legacy 20A circuits", "Older commercial buildings"],
        notes: "LEGACY - No ground. T-slot neutral accepts 1-15P plugs."
    },
    "1-30": {
        name: "NEMA 1-30", voltage: "125V", amperage: 30, wires: 2,
        pattern: PATTERNS.TWO_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { hotWidth: 8, neutralWidth: 10, hotHeight: 28, neutralHeight: 32, spacing: 42 },
        uses: ["Legacy high-current 125V", "Very rare"],
        notes: "LEGACY - Extremely rare. No ground connection."
    },

    // NEMA 2 Series - 250V 2-Wire (No Ground)
    "2-15": {
        name: "NEMA 2-15", voltage: "250V", amperage: 15, wires: 2,
        pattern: PATTERNS.TWO_WIRE_HORIZONTAL,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" }
        ],
        slotConfig: { slotWidth: 8, slotHeight: 22, spacing: 35 },
        uses: ["Legacy 240V equipment", "Extremely rare"],
        notes: "LEGACY - No ground. Do not use for new installations."
    },
    "2-20": {
        name: "NEMA 2-20", voltage: "250V", amperage: 20, wires: 2,
        pattern: PATTERNS.TWO_WIRE_HORIZONTAL,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" }
        ],
        slotConfig: { slotWidth: 8, slotHeight: 24, spacing: 38 },
        uses: ["Legacy 240V 20A equipment"],
        notes: "LEGACY - No ground connection."
    },
    "2-30": {
        name: "NEMA 2-30", voltage: "250V", amperage: 30, wires: 2,
        pattern: PATTERNS.TWO_WIRE_HORIZONTAL,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" }
        ],
        slotConfig: { slotWidth: 9, slotHeight: 26, spacing: 42 },
        uses: ["Legacy 240V 30A equipment", "Very rare"],
        notes: "LEGACY - No ground. Extremely rare."
    },

    // NEMA 5 Series - 125V 3-Wire (Grounded) - Most Common
    "5-15": {
        name: "NEMA 5-15", voltage: "125V", amperage: 15, wires: 3,
        pattern: PATTERNS.THREE_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { hotWidth: 6, neutralWidth: 8, hotHeight: 24, neutralHeight: 28, spacing: 35, groundOffset: 50 },
        uses: ["Standard household outlet", "TVs, computers, lamps", "General purpose 15A"],
        notes: "The most common outlet in US/Canadian homes."
    },
    "5-20": {
        name: "NEMA 5-20", voltage: "125V", amperage: 20, wires: 3,
        pattern: PATTERNS.T_SLOT,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { hotWidth: 7, neutralWidth: 9, hotHeight: 26, neutralHeight: 30, spacing: 35, groundOffset: 50 },
        uses: ["Kitchen countertops", "Bathrooms", "Garages", "Higher-draw appliances"],
        notes: "T-slot neutral accepts both 5-15P and 5-20P plugs. Required in kitchens/bathrooms."
    },
    "5-30": {
        name: "NEMA 5-30", voltage: "125V", amperage: 30, wires: 3,
        pattern: PATTERNS.THREE_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { hotWidth: 8, neutralWidth: 10, hotHeight: 28, neutralHeight: 32, spacing: 40, groundOffset: 55 },
        uses: ["High-current 125V equipment", "Some industrial tools"],
        notes: "Less common - most 30A needs are 240V."
    },
    "5-50": {
        name: "NEMA 5-50", voltage: "125V", amperage: 50, wires: 3,
        pattern: PATTERNS.THREE_WIRE_VERTICAL,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { hotWidth: 10, neutralWidth: 12, hotHeight: 32, neutralHeight: 36, spacing: 45, groundOffset: 60 },
        uses: ["Very high-current 125V", "Specialized equipment"],
        notes: "Rare - most 50A applications use 240V."
    },

    // NEMA 6 Series - 250V 3-Wire (Grounded)
    "6-15": {
        name: "NEMA 6-15", voltage: "250V", amperage: 15, wires: 3,
        pattern: PATTERNS.THREE_WIRE_HORIZONTAL,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 8, slotHeight: 22, spacing: 35, groundOffset: 45 },
        uses: ["Window air conditioners", "Small welders", "Power tools"],
        notes: "240V single-phase. No neutral - cannot provide 120V."
    },
    "6-20": {
        name: "NEMA 6-20", voltage: "250V", amperage: 20, wires: 3,
        pattern: PATTERNS.THREE_WIRE_MIXED,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { vertWidth: 8, vertHeight: 24, horizWidth: 8, horizHeight: 22, spacing: 35, groundOffset: 45 },
        uses: ["Large window AC", "Server rooms", "Commercial equipment"],
        notes: "One vertical, one horizontal hot blade."
    },
    "6-30": {
        name: "NEMA 6-30", voltage: "250V", amperage: 30, wires: 3,
        pattern: PATTERNS.THREE_WIRE_HORIZONTAL,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 9, slotHeight: 26, spacing: 40, groundOffset: 50 },
        uses: ["Shop equipment", "Compressors", "Medium welders"],
        notes: "Common workshop 240V outlet."
    },
    "6-50": {
        name: "NEMA 6-50", voltage: "250V", amperage: 50, wires: 3,
        pattern: PATTERNS.THREE_WIRE_ANGLED,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 30, angle: 45, spacing: 40, groundOffset: 50 },
        uses: ["Electric welders", "Plasma cutters", "Large shop equipment"],
        notes: "Heavy-duty 240V. Also used for some EV chargers."
    },

    // NEMA 7 Series - 277V 3-Wire (Commercial Single-Phase)
    "7-15": {
        name: "NEMA 7-15", voltage: "277V", amperage: 15, wires: 3,
        pattern: PATTERNS.THREE_WIRE_TANDEM,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 8, slotHeight: 22, spacing: 35, groundOffset: 45 },
        uses: ["Commercial lighting", "277V fluorescent fixtures"],
        notes: "277V is one leg of 480V 3-phase wye. Common in commercial buildings."
    },
    "7-20": {
        name: "NEMA 7-20", voltage: "277V", amperage: 20, wires: 3,
        pattern: PATTERNS.THREE_WIRE_TANDEM,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 8, slotHeight: 24, spacing: 38, groundOffset: 48 },
        uses: ["Commercial lighting circuits", "277V equipment"],
        notes: "Higher capacity commercial lighting."
    },
    "7-30": {
        name: "NEMA 7-30", voltage: "277V", amperage: 30, wires: 3,
        pattern: PATTERNS.THREE_WIRE_TANDEM,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 9, slotHeight: 26, spacing: 42, groundOffset: 52 },
        uses: ["Commercial/industrial 277V"],
        notes: "Higher current commercial applications."
    },
    "7-50": {
        name: "NEMA 7-50", voltage: "277V", amperage: 50, wires: 3,
        pattern: PATTERNS.THREE_WIRE_TANDEM,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotWidth: 10, slotHeight: 30, spacing: 48, groundOffset: 58 },
        uses: ["Industrial 277V equipment"],
        notes: "Heavy-duty commercial/industrial."
    },

    // NEMA 10 Series - 125/250V 3-Wire (Legacy Split-Phase, No Ground)
    "10-20": {
        name: "NEMA 10-20", voltage: "125/250V", amperage: 20, wires: 3,
        pattern: PATTERNS.THREE_WIRE_CROWFOOT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 24, angle: 45, spacing: 36, lSlotOffset: 25 },
        uses: ["Legacy small appliances", "Rare"],
        notes: "LEGACY - No ground (neutral doubles as ground). Replace with 14-20."
    },
    "10-30": {
        name: "NEMA 10-30", voltage: "125/250V", amperage: 30, wires: 3,
        pattern: PATTERNS.THREE_WIRE_CROWFOOT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 28, angle: 45, spacing: 40, lSlotOffset: 30 },
        uses: ["Legacy electric dryers (pre-1996)", "Older installations"],
        notes: "LEGACY - No ground. Replace with 14-30 when possible."
    },
    "10-50": {
        name: "NEMA 10-50", voltage: "125/250V", amperage: 50, wires: 3,
        pattern: PATTERNS.THREE_WIRE_CROWFOOT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 32, angle: 45, spacing: 45, lSlotOffset: 35 },
        uses: ["Legacy electric ranges (pre-1996)"],
        notes: "LEGACY - No ground. Replace with 14-50 when possible."
    },

    // NEMA 11 Series - 250V 3-Wire (3-Phase Delta, No Ground)
    "11-15": {
        name: "NEMA 11-15", voltage: "250V", amperage: 15, wires: 3,
        pattern: PATTERNS.THREE_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" }
        ],
        slotConfig: { slotLength: 22, radius: 30 },
        uses: ["3-phase motors", "Industrial equipment"],
        notes: "3-phase delta without ground. Use 15-series for grounded version."
    },
    "11-20": {
        name: "NEMA 11-20", voltage: "250V", amperage: 20, wires: 3,
        pattern: PATTERNS.THREE_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" }
        ],
        slotConfig: { slotLength: 24, radius: 32 },
        uses: ["3-phase equipment", "Small motors"],
        notes: "3-phase delta without ground."
    },
    "11-30": {
        name: "NEMA 11-30", voltage: "250V", amperage: 30, wires: 3,
        pattern: PATTERNS.THREE_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" }
        ],
        slotConfig: { slotLength: 26, radius: 35 },
        uses: ["3-phase motors", "Industrial machinery"],
        notes: "3-phase delta without ground."
    },
    "11-50": {
        name: "NEMA 11-50", voltage: "250V", amperage: 50, wires: 3,
        pattern: PATTERNS.THREE_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" }
        ],
        slotConfig: { slotLength: 30, radius: 38 },
        uses: ["Large 3-phase motors", "Heavy industrial"],
        notes: "3-phase delta without ground."
    },

    // NEMA 14 Series - 125/250V 4-Wire (Modern Split-Phase with Ground)
    "14-15": {
        name: "NEMA 14-15", voltage: "125/250V", amperage: 15, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_SPLIT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 22, angle: 45, spacing: 32, neutralHeight: 24, groundOffset: 50 },
        uses: ["Small split-phase equipment"],
        notes: "Modern grounded split-phase for lower current applications."
    },
    "14-20": {
        name: "NEMA 14-20", voltage: "125/250V", amperage: 20, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_SPLIT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 24, angle: 45, spacing: 34, neutralHeight: 26, groundOffset: 52 },
        uses: ["Equipment needing both 120V and 240V"],
        notes: "Modern replacement for 10-20."
    },
    "14-30": {
        name: "NEMA 14-30", voltage: "125/250V", amperage: 30, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_SPLIT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 26, angle: 45, spacing: 35, neutralHeight: 28, groundOffset: 55 },
        uses: ["Modern electric dryers", "Level 2 EV charging", "Small welders"],
        notes: "Required for new dryer installations since 1996."
    },
    "14-50": {
        name: "NEMA 14-50", voltage: "125/250V", amperage: 50, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_SPLIT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 30, angle: 45, spacing: 45, neutralHeight: 30, groundOffset: 55 },
        uses: ["Electric ranges/ovens", "Level 2 EV charging (Tesla)", "RV 50A", "Welders"],
        notes: "Most versatile high-power outlet. Standard for EV charging and ranges."
    },
    "14-60": {
        name: "NEMA 14-60", voltage: "125/250V", amperage: 60, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_SPLIT,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 32, angle: 45, spacing: 48, neutralHeight: 32, groundOffset: 58 },
        uses: ["Heavy equipment", "Large welders", "Industrial"],
        notes: "Maximum current in 14-series."
    },

    // NEMA 15 Series - 250V 4-Wire (3-Phase Delta with Ground)
    "15-15": {
        name: "NEMA 15-15", voltage: "250V", amperage: 15, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 20, radius: 28, groundRadius: 8 },
        uses: ["3-phase motors with ground"],
        notes: "Grounded version of 11-15."
    },
    "15-20": {
        name: "NEMA 15-20", voltage: "250V", amperage: 20, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 22, radius: 30, groundRadius: 8 },
        uses: ["3-phase equipment", "Motors"],
        notes: "Grounded 3-phase delta."
    },
    "15-30": {
        name: "NEMA 15-30", voltage: "250V", amperage: 30, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 24, radius: 33, groundRadius: 9 },
        uses: ["Industrial 3-phase", "Motor loads"],
        notes: "Common industrial 3-phase outlet."
    },
    "15-50": {
        name: "NEMA 15-50", voltage: "250V", amperage: 50, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 28, radius: 36, groundRadius: 10 },
        uses: ["Large 3-phase motors", "Industrial machinery"],
        notes: "Heavy-duty 3-phase delta."
    },
    "15-60": {
        name: "NEMA 15-60", voltage: "250V", amperage: 60, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_DELTA,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slotLength: 30, radius: 38, groundRadius: 11 },
        uses: ["Very large industrial loads"],
        notes: "Maximum 15-series amperage."
    },

    // NEMA 18 Series - 120/208V 4-Wire (3-Phase Wye)
    "18-15": {
        name: "NEMA 18-15", voltage: "120/208V", amperage: 15, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_WYE,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 20, radius: 28, neutralRadius: 6 },
        uses: ["3-phase wye equipment", "Data centers"],
        notes: "3-phase wye provides 120V phase-to-neutral, 208V phase-to-phase."
    },
    "18-20": {
        name: "NEMA 18-20", voltage: "120/208V", amperage: 20, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_WYE,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 22, radius: 30, neutralRadius: 7 },
        uses: ["Commercial equipment", "Server racks"],
        notes: "Common in commercial buildings."
    },
    "18-30": {
        name: "NEMA 18-30", voltage: "120/208V", amperage: 30, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_WYE,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 24, radius: 33, neutralRadius: 8 },
        uses: ["Commercial 3-phase", "Industrial"],
        notes: "Higher current 3-phase wye."
    },
    "18-50": {
        name: "NEMA 18-50", voltage: "120/208V", amperage: 50, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_WYE,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 28, radius: 36, neutralRadius: 9 },
        uses: ["Heavy commercial equipment"],
        notes: "High-current 3-phase wye."
    },
    "18-60": {
        name: "NEMA 18-60", voltage: "120/208V", amperage: 60, wires: 4,
        pattern: PATTERNS.FOUR_WIRE_WYE,
        terminals: [
            { id: "hot", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "hot3", label: "Phase Z", color: "#0000CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slotLength: 30, radius: 38, neutralRadius: 10 },
        uses: ["Industrial 3-phase wye"],
        notes: "Maximum 18-series amperage."
    },

    // Locking Connectors
    // =========================================================================
    // LOCKING L5 SERIES - 125V 3-Wire (Hot, Neutral, Ground)
    // =========================================================================
    "L5-15": {
        name: "NEMA L5-15", voltage: "125V", amperage: 15, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 30, slotLength: 18 },
        uses: ["Light-duty twist-lock", "Portable equipment", "Shop tools"],
        notes: "Smallest L5 connector. Twist-lock prevents accidental disconnection.",
        locking: true
    },
    "L5-20": {
        name: "NEMA L5-20", voltage: "125V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["General purpose twist-lock", "Construction sites", "Industrial 120V"],
        notes: "Common 20A locking connector for general industrial use.",
        locking: true
    },
    "L5-30": {
        name: "NEMA L5-30", voltage: "125V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["Portable generators", "RV parks (30A)", "Temporary power"],
        notes: "Very common generator outlet. Twist-lock prevents accidental disconnection.",
        locking: true
    },
    "L5-50": {
        name: "NEMA L5-50", voltage: "125V", amperage: 50, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 40, slotLength: 26 },
        uses: ["Heavy 125V equipment", "Large generators", "Industrial machinery"],
        notes: "Heavy-duty 125V locking connector for high-current applications.",
        locking: true
    },

    // =========================================================================
    // LOCKING L6 SERIES - 250V 3-Wire (Hot L1, Hot L2, Ground)
    // =========================================================================
    "L6-15": {
        name: "NEMA L6-15", voltage: "250V", amperage: 15, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 30, slotLength: 18 },
        uses: ["Small 240V equipment", "Window AC units", "Lab equipment"],
        notes: "Compact 250V locking connector for light-duty applications.",
        locking: true
    },
    "L6-20": {
        name: "NEMA L6-20", voltage: "250V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["Server room PDUs", "UPS systems", "Network equipment"],
        notes: "Very common in data centers. Often used for rack PDU connections.",
        locking: true
    },
    "L6-30": {
        name: "NEMA L6-30", voltage: "250V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["Data center PDUs", "Industrial equipment", "Welders"],
        notes: "Industrial twist-lock. Very common in server rooms and workshops.",
        locking: true
    },
    "L6-50": {
        name: "NEMA L6-50", voltage: "250V", amperage: 50, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 40, slotLength: 26 },
        uses: ["Heavy industrial equipment", "Large welders", "Industrial ovens"],
        notes: "Heavy-duty 250V locking connector for high-current industrial use.",
        locking: true
    },

    // =========================================================================
    // LOCKING L7 SERIES - 277V 3-Wire (Hot, Neutral, Ground)
    // =========================================================================
    "L7-15": {
        name: "NEMA L7-15", voltage: "277V", amperage: 15, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 30, slotLength: 18 },
        uses: ["Commercial lighting circuits", "277V building systems"],
        notes: "277V is common in commercial buildings for lighting efficiency.",
        locking: true
    },
    "L7-20": {
        name: "NEMA L7-20", voltage: "277V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["Commercial lighting", "HID ballasts", "Office buildings"],
        notes: "Standard commercial lighting circuit connector.",
        locking: true
    },
    "L7-30": {
        name: "NEMA L7-30", voltage: "277V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["High-power commercial lighting", "Industrial 277V equipment"],
        notes: "Higher amperage 277V locking connector.",
        locking: true
    },
    "L7-50": {
        name: "NEMA L7-50", voltage: "277V", amperage: 50, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 40, slotLength: 26 },
        uses: ["Industrial 277V equipment", "Large commercial installations"],
        notes: "Heavy-duty 277V locking connector for high-current applications.",
        locking: true
    },

    // =========================================================================
    // LOCKING L8 SERIES - 480V 3-Wire (Hot, Neutral, Ground)
    // =========================================================================
    "L8-20": {
        name: "NEMA L8-20", voltage: "480V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["Industrial 480V single-phase equipment", "Large motors"],
        notes: "480V single-phase locking connector. Common in industrial settings.",
        locking: true
    },
    "L8-30": {
        name: "NEMA L8-30", voltage: "480V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["Industrial equipment", "480V machinery", "Large compressors"],
        notes: "Higher amperage 480V single-phase locking connector.",
        locking: true
    },

    // =========================================================================
    // LOCKING L9 SERIES - 600V 3-Wire (Hot, Neutral, Ground)
    // =========================================================================
    "L9-20": {
        name: "NEMA L9-20", voltage: "600V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["Heavy industrial 600V equipment", "Mining equipment"],
        notes: "600V single-phase for heavy industrial applications. Primarily Canadian.",
        locking: true
    },
    "L9-30": {
        name: "NEMA L9-30", voltage: "600V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["Heavy industrial equipment", "Mining", "Oil & gas"],
        notes: "600V single-phase locking. Common in Canadian industrial facilities.",
        locking: true
    },

    // =========================================================================
    // LOCKING L10 SERIES - 125/250V 3-Wire (Hot L1, Hot L2, Neutral - NO GROUND)
    // =========================================================================
    "L10-20": {
        name: "NEMA L10-20", voltage: "125/250V", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["Legacy split-phase equipment", "Older industrial tools"],
        notes: "Legacy 3-wire split-phase WITHOUT ground. Use L14 series for new installations.",
        locking: true
    },
    "L10-30": {
        name: "NEMA L10-30", voltage: "125/250V", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["Legacy dryers", "Older equipment", "Industrial legacy"],
        notes: "Legacy split-phase locking WITHOUT ground. Superseded by L14-30.",
        locking: true
    },

    // =========================================================================
    // LOCKING L11 SERIES - 250V 3-Phase Delta 3-Wire (X, Y, Z - NO GROUND)
    // =========================================================================
    "L11-15": {
        name: "NEMA L11-15", voltage: "250V 3φ", amperage: 15, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" }
        ],
        slotConfig: { slots: 3, radius: 30, slotLength: 18 },
        uses: ["3-phase motors", "Legacy industrial equipment"],
        notes: "3-phase delta WITHOUT ground. Use L15 series for grounded applications.",
        locking: true
    },
    "L11-20": {
        name: "NEMA L11-20", voltage: "250V 3φ", amperage: 20, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" }
        ],
        slotConfig: { slots: 3, radius: 32, slotLength: 20 },
        uses: ["3-phase motors", "Industrial machinery", "Compressors"],
        notes: "3-phase delta locking WITHOUT ground wire.",
        locking: true
    },
    "L11-30": {
        name: "NEMA L11-30", voltage: "250V 3φ", amperage: 30, wires: 3,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" }
        ],
        slotConfig: { slots: 3, radius: 35, slotLength: 22 },
        uses: ["3-phase motors", "Industrial equipment", "Machine tools"],
        notes: "3-phase delta locking. No ground - use L15-30 for grounded circuits.",
        locking: true
    },

    // =========================================================================
    // LOCKING L14 SERIES - 125/250V Split-Phase 4-Wire
    // =========================================================================
    "L14-20": {
        name: "NEMA L14-20", voltage: "125/250V", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["Small generators", "Light equipment", "Portable power"],
        notes: "Smaller version of L14-30 for lighter loads.",
        locking: true
    },
    "L14-30": {
        name: "NEMA L14-30", voltage: "125/250V", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["Generator transfer switches", "Portable generators", "RV shore power"],
        notes: "Most common generator outlet. Provides both 120V and 240V.",
        locking: true
    },
    "L14-50": {
        name: "NEMA L14-50", voltage: "125/250V", amperage: 50, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 40, slotLength: 24 },
        uses: ["Large generators", "RV 50A shore power", "Heavy equipment"],
        notes: "Heavy-duty split-phase locking connector.",
        locking: true
    },
    "L14-60": {
        name: "NEMA L14-60", voltage: "125/250V", amperage: 60, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "hot", label: "Hot L1", color: "#000000", wireColor: "Black" },
            { id: "hot2", label: "Hot L2", color: "#CC0000", wireColor: "Red" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 42, slotLength: 26 },
        uses: ["Industrial equipment", "Large generators", "Heavy machinery"],
        notes: "Largest L14 connector for high-current split-phase applications.",
        locking: true
    },

    // =========================================================================
    // LOCKING L15 SERIES - 250V 3-Phase Delta 4-Wire (X, Y, Z, Ground)
    // =========================================================================
    "L15-20": {
        name: "NEMA L15-20", voltage: "250V 3φ", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["3-phase motors", "Industrial equipment", "Machine tools"],
        notes: "3-phase delta configuration without neutral. 250V between phases.",
        locking: true
    },
    "L15-30": {
        name: "NEMA L15-30", voltage: "250V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["3-phase motors", "Compressors", "Industrial machinery"],
        notes: "Common 3-phase delta locking connector for industrial equipment.",
        locking: true
    },
    "L15-50": {
        name: "NEMA L15-50", voltage: "250V 3φ", amperage: 50, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 40, slotLength: 24 },
        uses: ["Large 3-phase motors", "Heavy industrial equipment"],
        notes: "Heavy-duty 3-phase delta locking connector.",
        locking: true
    },
    "L15-60": {
        name: "NEMA L15-60", voltage: "250V 3φ", amperage: 60, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 42, slotLength: 26 },
        uses: ["Heavy industrial 3-phase equipment", "Large motors"],
        notes: "Largest L15 connector for high-current 3-phase delta applications.",
        locking: true
    },

    // =========================================================================
    // LOCKING L16 SERIES - 480V 3-Phase Delta 4-Wire (X, Y, Z, Ground)
    // =========================================================================
    "L16-20": {
        name: "NEMA L16-20", voltage: "480V 3φ", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["Industrial 3-phase 480V", "Large motors", "HVAC equipment"],
        notes: "480V 3-phase delta with ground. Common in US industrial facilities.",
        locking: true
    },
    "L16-30": {
        name: "NEMA L16-30", voltage: "480V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["Industrial equipment", "Large compressors", "Manufacturing"],
        notes: "480V 3-phase delta locking. Standard in many industrial plants.",
        locking: true
    },

    // =========================================================================
    // LOCKING L17 SERIES - 600V 3-Phase Delta 4-Wire (X, Y, Z, Ground)
    // =========================================================================
    "L17-30": {
        name: "NEMA L17-30", voltage: "600V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["Heavy industrial 3-phase", "Mining", "Oil & gas"],
        notes: "600V 3-phase delta. Common in Canadian industrial facilities.",
        locking: true
    },

    // =========================================================================
    // LOCKING L18 SERIES - 120/208V 3-Phase Wye 4-Wire (X, Y, Z, Neutral - NO GROUND)
    // =========================================================================
    "L18-20": {
        name: "NEMA L18-20", voltage: "120/208V 3φ", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["3-phase wye equipment", "Legacy commercial systems"],
        notes: "3-phase wye WITHOUT ground. Use L21 series for grounded circuits.",
        locking: true
    },
    "L18-30": {
        name: "NEMA L18-30", voltage: "120/208V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["3-phase wye systems", "Commercial HVAC", "Industrial"],
        notes: "3-phase wye WITHOUT ground wire. L21-30 preferred for new work.",
        locking: true
    },

    // =========================================================================
    // LOCKING L19 SERIES - 277/480V 3-Phase Wye 4-Wire (X, Y, Z, Neutral - NO GROUND)
    // =========================================================================
    "L19-20": {
        name: "NEMA L19-20", voltage: "277/480V 3φ", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["Commercial 3-phase wye", "Large office buildings", "Industrial"],
        notes: "277/480V wye. 277V phase-to-neutral for lighting, 480V phase-to-phase.",
        locking: true
    },
    "L19-30": {
        name: "NEMA L19-30", voltage: "277/480V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["Commercial buildings", "Industrial 480V wye systems"],
        notes: "277/480V wye WITHOUT ground. Use L22 for grounded applications.",
        locking: true
    },

    // =========================================================================
    // LOCKING L20 SERIES - 347/600V 3-Phase Wye 4-Wire (X, Y, Z, Neutral - NO GROUND)
    // =========================================================================
    "L20-20": {
        name: "NEMA L20-20", voltage: "347/600V 3φ", amperage: 20, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 32, slotLength: 18 },
        uses: ["Canadian commercial systems", "Large industrial facilities"],
        notes: "347/600V wye. 347V lighting common in Canadian commercial buildings.",
        locking: true
    },
    "L20-30": {
        name: "NEMA L20-30", voltage: "347/600V 3φ", amperage: 30, wires: 4,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" }
        ],
        slotConfig: { slots: 4, radius: 35, slotLength: 20 },
        uses: ["Canadian industrial", "Heavy commercial equipment"],
        notes: "347/600V wye. Primary Canadian industrial distribution voltage.",
        locking: true
    },

    // =========================================================================
    // LOCKING L21 SERIES - 120/208V 3-Phase Wye 5-Wire (X, Y, Z, Neutral, Ground)
    // =========================================================================
    "L21-20": {
        name: "NEMA L21-20", voltage: "120/208V 3φ", amperage: 20, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 35, slotLength: 16 },
        uses: ["Data center PDUs", "Server room power", "Critical infrastructure"],
        notes: "3-phase wye with neutral. 120V phase-to-neutral, 208V phase-to-phase.",
        locking: true
    },
    "L21-30": {
        name: "NEMA L21-30", voltage: "120/208V 3φ", amperage: 30, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 38, slotLength: 18 },
        uses: ["Data center PDUs", "Large server racks", "Industrial 3-phase wye"],
        notes: "Very common in data centers. Provides both 120V and 208V 3-phase power.",
        locking: true
    },

    // =========================================================================
    // LOCKING L22 SERIES - 277/480V 3-Phase Wye 5-Wire (X, Y, Z, Neutral, Ground)
    // =========================================================================
    "L22-20": {
        name: "NEMA L22-20", voltage: "277/480V 3φ", amperage: 20, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 35, slotLength: 16 },
        uses: ["Commercial building power", "Industrial 480V wye", "Large HVAC"],
        notes: "277/480V wye with ground. 277V for lighting, 480V for motors.",
        locking: true
    },
    "L22-30": {
        name: "NEMA L22-30", voltage: "277/480V 3φ", amperage: 30, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 38, slotLength: 18 },
        uses: ["Commercial/industrial buildings", "Data centers (480V)", "Heavy equipment"],
        notes: "Full 5-wire 277/480V wye with ground for commercial/industrial use.",
        locking: true
    },

    // =========================================================================
    // LOCKING L23 SERIES - 347/600V 3-Phase Wye 5-Wire (X, Y, Z, Neutral, Ground)
    // =========================================================================
    "L23-20": {
        name: "NEMA L23-20", voltage: "347/600V 3φ", amperage: 20, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 35, slotLength: 16 },
        uses: ["Canadian industrial facilities", "Heavy commercial buildings"],
        notes: "347/600V wye with ground. Standard Canadian industrial voltage.",
        locking: true
    },
    "L23-30": {
        name: "NEMA L23-30", voltage: "347/600V 3φ", amperage: 30, wires: 5,
        pattern: PATTERNS.LOCKING,
        terminals: [
            { id: "x", label: "Phase X", color: "#000000", wireColor: "Black" },
            { id: "y", label: "Phase Y", color: "#CC0000", wireColor: "Red" },
            { id: "z", label: "Phase Z", color: "#0066CC", wireColor: "Blue" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { slots: 5, radius: 38, slotLength: 18 },
        uses: ["Canadian industrial", "Mining operations", "Heavy manufacturing"],
        notes: "Full 5-wire 347/600V wye. Primary Canadian heavy industrial connector.",
        locking: true
    },

    // RV Special
    "TT-30": {
        name: "NEMA TT-30", voltage: "125V", amperage: 30, wires: 3,
        pattern: PATTERNS.TT_RV,
        terminals: [
            { id: "hot", label: "Hot", color: "#000000", wireColor: "Black" },
            { id: "neutral", label: "Neutral", color: "#FFFFFF", wireColor: "White" },
            { id: "ground", label: "Ground", color: "#00AA00", wireColor: "Green/Bare" }
        ],
        slotConfig: { curveAngle: 30, spacing: 50, groundOffset: 55 },
        uses: ["RV parks", "Travel trailers", "Motorhomes"],
        notes: "TT = Travel Trailer. Standard 30A RV outlet. Not twist-lock despite curved slots."
    }
};

// ============================================================================
// PATTERN-BASED DRAWING ENGINE
// ============================================================================

function drawConnector(svg, connectorType, cx, cy, isReceptacle) {
    const connector = nemaConnectors[connectorType];
    if (!connector) return;

    const config = connector.slotConfig;

    switch (connector.pattern) {
        case PATTERNS.TWO_WIRE_VERTICAL:
            drawTwoWireVertical(svg, cx, cy, isReceptacle, config, connector);
            break;
        case PATTERNS.TWO_WIRE_HORIZONTAL:
            drawTwoWireHorizontal(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_VERTICAL:
            drawThreeWireVertical(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.T_SLOT:
            drawTSlotPattern(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_HORIZONTAL:
            drawThreeWireHorizontal(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_MIXED:
            drawThreeWireMixed(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_ANGLED:
            drawThreeWireAngled(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_CROWFOOT:
            drawThreeWireCrowfoot(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_TANDEM:
            drawThreeWireTandem(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.THREE_WIRE_DELTA:
            drawThreeWireDelta(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.FOUR_WIRE_SPLIT:
            drawFourWireSplit(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.FOUR_WIRE_DELTA:
            drawFourWireDelta(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.FOUR_WIRE_WYE:
            drawFourWireWye(svg, cx, cy, isReceptacle, config);
            break;
        case PATTERNS.LOCKING:
            drawLockingPattern(svg, cx, cy, isReceptacle, config, connector.terminals);
            break;
        case PATTERNS.TT_RV:
            drawTTPattern(svg, cx, cy, isReceptacle, config);
            break;
    }
}

// Pattern drawing functions

function drawTwoWireVertical(svg, cx, cy, isReceptacle, config, connector) {
    const w = isReceptacle ? 1 : 0.8;
    // Hot (narrower)
    drawSlot(svg, cx - config.spacing/2, cy, config.hotWidth * w, config.hotHeight, isReceptacle, 'vertical', 'Hot');
    // Neutral (wider) - may be T-slot
    if (config.tSlot && isReceptacle) {
        drawTSlot(svg, cx + config.spacing/2, cy, config.neutralWidth, config.neutralHeight, 'N');
    } else {
        drawSlot(svg, cx + config.spacing/2, cy, config.neutralWidth * w, config.neutralHeight, isReceptacle, 'vertical', 'N');
    }
}

function drawTwoWireHorizontal(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    drawSlot(svg, cx - config.spacing/2, cy, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'L1');
    drawSlot(svg, cx + config.spacing/2, cy, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'L2');
}

function drawThreeWireVertical(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    drawSlot(svg, cx - config.spacing/2, cy - 15, config.hotWidth * w, config.hotHeight, isReceptacle, 'vertical', 'Hot');
    drawSlot(svg, cx + config.spacing/2, cy - 15, config.neutralWidth * w, config.neutralHeight, isReceptacle, 'vertical', 'N');
    drawGroundPin(svg, cx, cy + config.groundOffset - 15, isReceptacle, 'G');
}

function drawTSlotPattern(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    drawSlot(svg, cx - config.spacing/2, cy - 15, config.hotWidth * w, config.hotHeight, isReceptacle, 'vertical', 'Hot');
    if (isReceptacle) {
        drawTSlot(svg, cx + config.spacing/2, cy - 15, config.neutralWidth, config.neutralHeight, 'N');
    } else {
        drawSlot(svg, cx + config.spacing/2, cy - 10, config.neutralWidth * w, 20, isReceptacle, 'horizontal', 'N');
    }
    drawGroundPin(svg, cx, cy + config.groundOffset - 15, isReceptacle, 'G');
}

function drawThreeWireHorizontal(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    drawSlot(svg, cx - config.spacing/2, cy - 10, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'L1');
    drawSlot(svg, cx + config.spacing/2, cy - 10, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'L2');
    drawGroundPin(svg, cx, cy + config.groundOffset - 10, isReceptacle, 'G');
}

function drawThreeWireMixed(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    drawSlot(svg, cx - config.spacing/2, cy - 15, config.vertWidth * w, config.vertHeight, isReceptacle, 'vertical', 'L1');
    drawSlot(svg, cx + config.spacing/2, cy - 10, config.horizWidth * w, config.horizHeight, isReceptacle, 'horizontal', 'L2');
    drawGroundPin(svg, cx, cy + config.groundOffset - 10, isReceptacle, 'G');
}

function drawThreeWireAngled(svg, cx, cy, isReceptacle, config) {
    drawAngledSlot(svg, cx - config.spacing/2, cy - 10, config.slotLength, config.angle, isReceptacle, 'L1');
    drawAngledSlot(svg, cx + config.spacing/2, cy - 10, config.slotLength, -config.angle, isReceptacle, 'L2');
    drawLargeGroundPin(svg, cx, cy + config.groundOffset, isReceptacle, 'G');
}

function drawThreeWireCrowfoot(svg, cx, cy, isReceptacle, config) {
    drawAngledSlot(svg, cx - config.spacing/2, cy - 15, config.slotLength, config.angle, isReceptacle, 'L1');
    drawAngledSlot(svg, cx + config.spacing/2, cy - 15, config.slotLength, -config.angle, isReceptacle, 'L2');
    drawLSlot(svg, cx, cy + config.lSlotOffset, isReceptacle, 'N');
}

function drawThreeWireTandem(svg, cx, cy, isReceptacle, config) {
    const w = isReceptacle ? 1 : 0.8;
    // Tandem = side by side horizontal
    drawSlot(svg, cx - config.spacing/2, cy - 15, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'Hot');
    drawSlot(svg, cx + config.spacing/2, cy - 15, config.slotWidth * w, config.slotHeight, isReceptacle, 'horizontal', 'N');
    drawGroundPin(svg, cx, cy + config.groundOffset - 10, isReceptacle, 'G');
}

function drawThreeWireDelta(svg, cx, cy, isReceptacle, config) {
    // 3 slots in triangle pattern
    const angles = [90, 210, 330]; // degrees
    const labels = ['X', 'Y', 'Z'];
    angles.forEach((angle, i) => {
        const rad = angle * Math.PI / 180;
        const x = cx + config.radius * Math.cos(rad);
        const y = cy + config.radius * Math.sin(rad);
        drawAngledSlot(svg, x, y, config.slotLength, angle + 90, isReceptacle, labels[i]);
    });
}

function drawFourWireSplit(svg, cx, cy, isReceptacle, config) {
    // Angled hots at top, vertical neutral in middle, U-ground at bottom
    drawAngledSlot(svg, cx - config.spacing/2, cy - 20, config.slotLength, config.angle, isReceptacle, 'L1');
    drawAngledSlot(svg, cx + config.spacing/2, cy - 20, config.slotLength, -config.angle, isReceptacle, 'L2');
    drawSlot(svg, cx, cy + 15, isReceptacle ? 10 : 8, config.neutralHeight, isReceptacle, 'vertical', 'N');
    drawLargeGroundPin(svg, cx, cy + config.groundOffset, isReceptacle, 'G');
}

function drawFourWireDelta(svg, cx, cy, isReceptacle, config) {
    // 3 phase slots in triangle + center ground
    const angles = [90, 210, 330];
    const labels = ['X', 'Y', 'Z'];
    angles.forEach((angle, i) => {
        const rad = angle * Math.PI / 180;
        const x = cx + config.radius * Math.cos(rad);
        const y = cy + config.radius * Math.sin(rad);
        drawAngledSlot(svg, x, y, config.slotLength, angle + 90, isReceptacle, labels[i]);
    });
    // Center ground
    if (isReceptacle) {
        svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', config.groundRadius)
            .attr('fill', '#1a1a1a').attr('stroke', '#000').attr('stroke-width', 1);
    } else {
        svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', config.groundRadius)
            .attr('class', 'pin');
    }
    svg.append('text').attr('x', cx).attr('y', cy + config.groundRadius + 12)
        .attr('class', 'terminal-label').text('G');
}

function drawFourWireWye(svg, cx, cy, isReceptacle, config) {
    // 3 phase slots + center neutral (for wye)
    const angles = [90, 210, 330];
    const labels = ['X', 'Y', 'Z'];
    angles.forEach((angle, i) => {
        const rad = angle * Math.PI / 180;
        const x = cx + config.radius * Math.cos(rad);
        const y = cy + config.radius * Math.sin(rad);
        drawAngledSlot(svg, x, y, config.slotLength, angle + 90, isReceptacle, labels[i]);
    });
    // Center neutral
    if (isReceptacle) {
        svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', config.neutralRadius)
            .attr('fill', '#1a1a1a').attr('stroke', '#000').attr('stroke-width', 1);
    } else {
        svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', config.neutralRadius)
            .attr('fill', '#f0f0f0').attr('stroke', '#808080').attr('stroke-width', 1);
    }
    svg.append('text').attr('x', cx).attr('y', cy + config.neutralRadius + 12)
        .attr('class', 'terminal-label').text('N');
}

function drawLockingPattern(svg, cx, cy, isReceptacle, config, terminals) {
    // Locking ring
    svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', config.radius + 15)
        .attr('fill', 'none').attr('stroke', '#666').attr('stroke-width', 2)
        .attr('stroke-dasharray', '5,5');

    const labels = terminals.map(t => t.label.split(' ').pop());
    for (let i = 0; i < config.slots; i++) {
        const angle = (i * 360 / config.slots - 90) * Math.PI / 180;
        const x = cx + config.radius * Math.cos(angle);
        const y = cy + config.radius * Math.sin(angle);

        // Curved slot
        const startAngle = angle - 0.5;
        const endAngle = angle + 0.5;
        const startX = x + (config.slotLength/2) * Math.cos(startAngle);
        const startY = y + (config.slotLength/2) * Math.sin(startAngle);
        const endX = x + (config.slotLength/2) * Math.cos(endAngle);
        const endY = y + (config.slotLength/2) * Math.sin(endAngle);

        svg.append('path')
            .attr('d', `M ${startX} ${startY} A ${config.slotLength/2} ${config.slotLength/2} 0 0 1 ${endX} ${endY}`)
            .attr('fill', 'none')
            .attr('stroke', isReceptacle ? '#1a1a1a' : '#C0C0C0')
            .attr('stroke-width', isReceptacle ? 6 : 5)
            .attr('stroke-linecap', 'round');

        // Label
        const labelRadius = config.radius + 30;
        svg.append('text')
            .attr('x', cx + labelRadius * Math.cos(angle))
            .attr('y', cy + labelRadius * Math.sin(angle) + 4)
            .attr('class', 'terminal-label')
            .text(labels[i]);
    }

    // Center keyway
    svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', 8)
        .attr('fill', isReceptacle ? '#1a1a1a' : '#C0C0C0')
        .attr('stroke', '#333').attr('stroke-width', 1);
}

function drawTTPattern(svg, cx, cy, isReceptacle, config) {
    // TT-30 has curved (but not locking) slots
    const curveRad = config.curveAngle * Math.PI / 180;

    // Hot (left curved)
    drawCurvedSlot(svg, cx - 25, cy - 15, 26, isReceptacle, 'Hot', config.curveAngle);
    // Neutral (right curved)
    drawCurvedSlot(svg, cx + 25, cy - 15, 26, isReceptacle, 'N', -config.curveAngle);
    // Ground
    drawGroundPin(svg, cx, cy + 40, isReceptacle, 'G');
}

// ============================================================================
// PRIMITIVE DRAWING FUNCTIONS
// ============================================================================

function drawSlot(svg, x, y, width, height, isReceptacle, orientation, label) {
    const className = isReceptacle ? 'slot' : 'pin';
    if (orientation === 'vertical') {
        svg.append('rect')
            .attr('x', x - width/2).attr('y', y - height/2)
            .attr('width', width).attr('height', height)
            .attr('rx', isReceptacle ? 2 : 1).attr('class', className);
        svg.append('text').attr('x', x).attr('y', y - height/2 - 6)
            .attr('class', 'terminal-label').text(label);
    } else {
        svg.append('rect')
            .attr('x', x - height/2).attr('y', y - width/2)
            .attr('width', height).attr('height', width)
            .attr('rx', isReceptacle ? 2 : 1).attr('class', className);
        svg.append('text').attr('x', x).attr('y', y - width/2 - 6)
            .attr('class', 'terminal-label').text(label);
    }
}

function drawTSlot(svg, x, y, width, height, label) {
    const g = svg.append('g');
    g.append('rect').attr('x', x - 5).attr('y', y - height/2)
        .attr('width', 10).attr('height', height).attr('rx', 2).attr('class', 'slot');
    g.append('rect').attr('x', x - 15).attr('y', y - 5)
        .attr('width', 30).attr('height', 10).attr('rx', 2).attr('class', 'slot');
    svg.append('text').attr('x', x).attr('y', y - height/2 - 6)
        .attr('class', 'terminal-label').text(label);
}

function drawAngledSlot(svg, x, y, length, angle, isReceptacle, label) {
    const rad = angle * Math.PI / 180;
    const x1 = x - (length/2) * Math.cos(rad);
    const y1 = y - (length/2) * Math.sin(rad);
    const x2 = x + (length/2) * Math.cos(rad);
    const y2 = y + (length/2) * Math.sin(rad);

    svg.append('line')
        .attr('x1', x1).attr('y1', y1).attr('x2', x2).attr('y2', y2)
        .attr('stroke', isReceptacle ? '#1a1a1a' : '#C0C0C0')
        .attr('stroke-width', isReceptacle ? 8 : 6)
        .attr('stroke-linecap', 'round');

    svg.append('text').attr('x', x).attr('y', y - length/2 - 8)
        .attr('class', 'terminal-label').text(label);
}

function drawGroundPin(svg, x, y, isReceptacle, label) {
    if (isReceptacle) {
        svg.append('path')
            .attr('d', `M ${x-10} ${y-12} L ${x-10} ${y+5} Q ${x-10} ${y+12} ${x} ${y+12} Q ${x+10} ${y+12} ${x+10} ${y+5} L ${x+10} ${y-12}`)
            .attr('fill', 'none').attr('stroke', '#1a1a1a')
            .attr('stroke-width', 6).attr('stroke-linecap', 'round');
    } else {
        svg.append('circle').attr('cx', x).attr('cy', y).attr('r', 8).attr('class', 'pin');
    }
    svg.append('text').attr('x', x).attr('y', y + 25).attr('class', 'terminal-label').text(label);
}

function drawLargeGroundPin(svg, x, y, isReceptacle, label) {
    if (isReceptacle) {
        svg.append('path')
            .attr('d', `M ${x-15} ${y-15} L ${x-15} ${y+5} Q ${x-15} ${y+15} ${x} ${y+15} Q ${x+15} ${y+15} ${x+15} ${y+5} L ${x+15} ${y-15}`)
            .attr('fill', 'none').attr('stroke', '#1a1a1a')
            .attr('stroke-width', 8).attr('stroke-linecap', 'round');
    } else {
        svg.append('circle').attr('cx', x).attr('cy', y).attr('r', 10).attr('class', 'pin');
    }
    svg.append('text').attr('x', x).attr('y', y + 28).attr('class', 'terminal-label').text(label);
}

function drawLSlot(svg, x, y, isReceptacle, label) {
    const width = isReceptacle ? 6 : 5;
    svg.append('path')
        .attr('d', `M ${x-12} ${y} L ${x} ${y} L ${x} ${y+15}`)
        .attr('fill', 'none')
        .attr('stroke', isReceptacle ? '#1a1a1a' : '#C0C0C0')
        .attr('stroke-width', width).attr('stroke-linecap', 'round');
    svg.append('text').attr('x', x - 15).attr('y', y - 8).attr('class', 'terminal-label').text(label);
}

function drawCurvedSlot(svg, x, y, length, isReceptacle, label, curveAngle) {
    const rad = curveAngle * Math.PI / 180;
    const startX = x - length/2 * Math.sin(rad);
    const startY = y - length/2 * Math.cos(rad);
    const endX = x + length/2 * Math.sin(rad);
    const endY = y + length/2 * Math.cos(rad);

    svg.append('path')
        .attr('d', `M ${startX} ${startY} Q ${x} ${y - 5} ${endX} ${endY}`)
        .attr('fill', 'none')
        .attr('stroke', isReceptacle ? '#1a1a1a' : '#C0C0C0')
        .attr('stroke-width', isReceptacle ? 6 : 5).attr('stroke-linecap', 'round');
    svg.append('text').attr('x', x).attr('y', y - length/2 - 10).attr('class', 'terminal-label').text(label);
}

// ============================================================================
// MAIN DRAWING FUNCTIONS
// ============================================================================

function drawReceptacle(connectorType) {
    const svg = d3.select('#receptacleSvg');
    svg.selectAll('*').remove();

    const connector = nemaConnectors[connectorType];
    const cx = 110, cy = 110, radius = 90;

    svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', radius).attr('class', 'connector-face');
    drawConnector(svg, connectorType, cx, cy, true);
    svg.append('text').attr('x', cx).attr('y', cy + radius + 15)
        .attr('class', 'connector-type-label').text(connector.name + 'R');
}

function drawPlug(connectorType) {
    const svg = d3.select('#plugSvg');
    svg.selectAll('*').remove();

    const connector = nemaConnectors[connectorType];
    const cx = 110, cy = 110, radius = 90;

    svg.append('circle').attr('cx', cx).attr('cy', cy).attr('r', radius)
        .attr('fill', '#e0e0e0').attr('stroke', '#333').attr('stroke-width', 3);
    drawConnector(svg, connectorType, cx, cy, false);
    svg.append('text').attr('x', cx).attr('y', cy + radius + 15)
        .attr('class', 'connector-type-label').text(connector.name + 'P');
}

function drawWiringDiagram(connectorType) {
    const svg = d3.select('#wiringSvg');
    svg.selectAll('*').remove();

    const connector = nemaConnectors[connectorType];
    const terminals = connector.terminals;

    // Cable sheath
    svg.append('rect').attr('x', 50).attr('y', 70).attr('width', 200).attr('height', 40)
        .attr('rx', 8).attr('fill', '#666').attr('stroke', '#333').attr('stroke-width', 2);

    // Terminal block
    svg.append('rect').attr('x', 400).attr('y', 30).attr('width', 150).attr('height', 120)
        .attr('rx', 6).attr('fill', '#f5f5f5').attr('stroke', '#333').attr('stroke-width', 2);
    svg.append('text').attr('x', 475).attr('y', 25).attr('text-anchor', 'middle')
        .attr('font-size', '12px').attr('font-weight', 'bold').attr('fill', '#333').text('Terminal Block');

    const terminalSpacing = 100 / (terminals.length + 1);

    terminals.forEach((terminal, i) => {
        const termY = 50 + (i + 1) * terminalSpacing + 10;

        let wireClass = 'wire-hot';
        if (terminal.id === 'neutral') wireClass = 'wire-neutral';
        else if (terminal.id === 'ground') wireClass = 'wire-ground';
        else if (terminal.id === 'hot2' || terminal.id === 'y') wireClass = 'wire-hot2';
        else if (terminal.id === 'hot3' || terminal.id === 'z') wireClass = 'wire-hot3';

        svg.append('path').attr('d', `M 250 90 C 300 90, 350 ${termY}, 400 ${termY}`)
            .attr('class', `wire-line ${wireClass}`);

        svg.append('circle').attr('cx', 420).attr('cy', termY).attr('r', 10)
            .attr('class', 'terminal-circle')
            .attr('fill', terminal.color === '#FFFFFF' ? '#f0f0f0' : terminal.color);

        svg.append('text').attr('x', 480).attr('y', termY + 4)
            .attr('font-size', '11px').attr('fill', '#333')
            .text(`${terminal.label} (${terminal.wireColor})`);
    });

    svg.append('text').attr('x', 150).attr('y', 130).attr('text-anchor', 'middle')
        .attr('font-size', '11px').attr('fill', '#999').text(`${connector.wires}-conductor cable`);

    updateWireLegend(connector);
}

function updateWireLegend(connector) {
    const legend = document.getElementById('wireLegend');
    legend.innerHTML = connector.terminals.map(terminal => {
        let colorClass = 'hot';
        if (terminal.id === 'neutral') colorClass = 'neutral';
        else if (terminal.id === 'ground') colorClass = 'ground';
        else if (terminal.id === 'hot2' || terminal.id === 'y') colorClass = 'hot2';
        else if (terminal.id === 'hot3' || terminal.id === 'z') colorClass = 'hot3';
        return `<div class="wire-item"><div class="wire-color ${colorClass}"></div><span>${terminal.label} - ${terminal.wireColor}</span></div>`;
    }).join('');
}

function updateSpecs(connectorType) {
    const connector = nemaConnectors[connectorType];
    const awg = AWG_TABLE[connector.amperage] || { standard: '-', long: '-' };

    document.getElementById('specVoltage').textContent = connector.voltage;
    document.getElementById('specAmperage').textContent = connector.amperage + 'A';
    document.getElementById('specWires').textContent = connector.wires;
    document.getElementById('specAWG').textContent = awg.standard;

    // Calculate wattage
    let wattage;
    if (connector.voltage.includes('/')) {
        const volts = parseInt(connector.voltage.split('/')[1]);
        wattage = volts * connector.amperage;
    } else {
        wattage = parseInt(connector.voltage) * connector.amperage;
    }
    document.getElementById('specWattage').textContent = wattage.toLocaleString() + 'W';

    document.getElementById('usesListItems').innerHTML = connector.uses.map(u => `<li>${u}</li>`).join('');

    const notesEl = document.getElementById('connectorNotes');
    if (connector.notes) {
        notesEl.textContent = connector.notes;
        notesEl.style.display = 'block';
    } else {
        notesEl.style.display = 'none';
    }

    // Highlight AWG row
    document.querySelectorAll('#awgTableBody tr').forEach(row => {
        row.classList.remove('highlight');
        if (parseInt(row.cells[0].textContent) === connector.amperage) {
            row.classList.add('highlight');
        }
    });
}

function onConnectorChange() {
    const connectorType = document.getElementById('connectorType').value;
    drawReceptacle(connectorType);
    drawPlug(connectorType);
    drawWiringDiagram(connectorType);
    updateSpecs(connectorType);
}

document.addEventListener('DOMContentLoaded', function() {
    console.log('NEMA Connector Visualizer v2.0 - Pattern-based system loaded');
    console.log(`Total connectors: ${Object.keys(nemaConnectors).length}`);
    document.getElementById('connectorType').addEventListener('change', onConnectorChange);
    onConnectorChange();
});
</script>