{
  "schemaVersion": "1.0",
  "id": "https://elect-learn.org/en/lesson/08-receptacles-switches-lights/",
  "url": "https://elect-learn.org/en/lesson/08-receptacles-switches-lights/",
  "markdownUrl": "https://elect-learn.org/en/lesson/08-receptacles-switches-lights/index.md",
  "jsonUrl": "https://elect-learn.org/en/lesson/08-receptacles-switches-lights/index.json",
  "language": "en",
  "title": "Receptacles, Switches, and Lighting Logic",
  "description": "Do not memorize diagrams blindly; understand incoming power, outgoing load, and what the switch controls.",
  "kind": "lesson",
  "safetyNotice": "Learning reference only: electrical codes, permits, inspection bodies, and licensing rules differ by region. This course is not a substitute for local code, licensed training, permits, or authority requirements. Before any hands-on work, de-energize, verify absence of voltage, and follow local regulators/AHJ and employer procedures.",
  "sections": [
    {
      "id": "component-to-symbol",
      "heading": "Connect the component name to its drawing symbol",
      "paragraphs": [
        "A component photograph tells you what an item looks like. A schematic tells you how functions connect. Use the separate symbol chart to practise tracing a complete path."
      ],
      "links": [
        {
          "title": "Electrical symbols chart and circuit practice",
          "url": "https://elect-learn.org/en/guides/electrical-drawing-symbols/"
        }
      ]
    },
    {
      "id": "section-1",
      "heading": "Lesson information",
      "paragraphs": [
        "Residential Devices · Intermediate · 26 min",
        "Wiring Logic"
      ]
    },
    {
      "id": "section-2",
      "heading": "Controlling a load is not isolating every live part.",
      "paragraphs": [
        "The source provides voltage. Closing the switch completes the path so current can flow through the load."
      ],
      "items": [
        "Source, switch, and load form the working circuit.",
        "The switch opens or closes the path and the lamp responds.",
        "A dark lamp does not prove every part of the fitting is dead."
      ]
    },
    {
      "id": "section-3",
      "heading": "Goals",
      "items": [
        "Understand typical functional terminals of receptacles, switches, and fixtures.",
        "Recognize switch legs and always-hot conductors.",
        "Know why photos, labels, and verification matter before disconnecting."
      ]
    },
    {
      "id": "section-4",
      "heading": "The lamp holder is still energized with the switch off",
      "paragraphs": [
        "While replacing a light fixture, the wall switch is off, but one conductor in the ceiling box still tests energized.",
        "Wrong call: Assuming the fixture can be removed because the switch is off.",
        "Stop point: The fixture box may contain always-hot feed or multiple circuits; de-energize at the breaker and verify.",
        "Reasoning path: Photograph and label, identify feed, switch leg, neutral, and ground; hand complex multi-wire boxes to licensed personnel.",
        "Review: Exam focus: switching the ungrounded conductor, equipment grounding, terminal colors, and conductor identification."
      ]
    },
    {
      "id": "section-5",
      "heading": "Core concepts",
      "items": [
        "A switch typically controls the hot side so the load no longer receives supply when off.",
        "A white conductor is not always neutral; older switch loops may be re-identified.",
        "Receptacle brass terminals commonly take hot, silver neutral, and green ground."
      ]
    },
    {
      "id": "tool-driver",
      "heading": "Insulated Screwdriver",
      "paragraphs": [
        "Used for terminals and cover screws; insulation adds a layer of protection.",
        "Misuse and limits: An insulated tool is not permission for live work and must not be trusted if damaged."
      ]
    },
    {
      "id": "tool-stripper",
      "heading": "Wire Stripper",
      "paragraphs": [
        "Strips insulation by wire gauge while protecting the copper conductor.",
        "Misuse and limits: Nicking copper weakens the conductor and can increase heating risk."
      ]
    },
    {
      "id": "tool-pliers",
      "heading": "Needle-nose Pliers",
      "paragraphs": [
        "Bends conductors, holds small parts, and organizes wires inside a box.",
        "Misuse and limits: Do not cut energized conductors or treat ordinary pliers as insulated tools."
      ]
    },
    {
      "id": "tool-wire-nut",
      "heading": "Wire Connector",
      "paragraphs": [
        "Mechanically joins and insulates compatible conductors.",
        "Misuse and limits: Wrong size, uneven copper, or no pull test can leave a loose splice."
      ]
    },
    {
      "id": "tool-cable",
      "heading": "NM Cable / Conductors",
      "paragraphs": [
        "Carries circuit current; color and markings help identify use.",
        "Misuse and limits: Wrong gauge, jacket, environment, or color use may violate code."
      ]
    },
    {
      "id": "tool-box",
      "heading": "Electrical Box",
      "paragraphs": [
        "Houses splices, supports devices, and protects connection points.",
        "Misuse and limits: Overfilled boxes, missing covers, or exposed splices are common hazards."
      ]
    },
    {
      "id": "section-12",
      "heading": "Common Pitfalls",
      "items": [
        "Disconnecting wires without photos or labels.",
        "Treating every white wire as neutral.",
        "Misreading a loose backstab connection as device failure."
      ]
    },
    {
      "id": "section-13",
      "heading": "Safe Workflow",
      "items": [
        "De-energize, verify, photograph, and label.",
        "Identify line/feed, load, switch leg, and ground.",
        "Terminate according to device instructions and local code; have qualified review where required."
      ],
      "ordered": true
    },
    {
      "id": "quiz-1",
      "heading": "Is a fixture box guaranteed de-energized when the wall switch is off?",
      "paragraphs": [
        "No. The box may contain an always-hot feed or other circuits; de-energize at the breaker and verify."
      ]
    },
    {
      "id": "quiz-2",
      "heading": "What should you record before disconnecting wires?",
      "paragraphs": [
        "Clear photos, labels, and each conductor's terminal/splice relationship."
      ]
    },
    {
      "id": "section-16",
      "heading": "Look Back",
      "links": [
        {
          "title": "Review Lesson 2: de-energize and verify.",
          "url": "https://elect-learn.org/en/lesson/02-deenergize-test-lockout/"
        },
        {
          "title": "Review Lesson 5: hot, neutral, and ground roles.",
          "url": "https://elect-learn.org/en/lesson/05-hot-neutral-ground/"
        }
      ]
    }
  ],
  "dateModified": "2026-10-23",
  "publisher": {
    "name": "Elect Learn",
    "url": "https://elect-learn.org"
  },
  "review": {
    "status": "not-independently-reviewed",
    "statement": "No independent professional review is recorded. Cited sources do not imply review or endorsement by those organizations.",
    "policyUrl": "https://elect-learn.org/en/methodology/"
  }
}