{
  "schemaVersion": "1.0",
  "id": "https://elect-learn.org/en/lesson/12-common-fault-map/",
  "url": "https://elect-learn.org/en/lesson/12-common-fault-map/",
  "markdownUrl": "https://elect-learn.org/en/lesson/12-common-fault-map/index.md",
  "jsonUrl": "https://elect-learn.org/en/lesson/12-common-fault-map/index.json",
  "language": "en",
  "title": "Common Fault Troubleshooting Map",
  "description": "Put dead circuits, trips, heat, and miswiring into one decision map that reviews the first 11 lessons.",
  "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": "section-1",
      "heading": "Lesson information",
      "paragraphs": [
        "Practical Workflows · Capstone · 30 min",
        "Troubleshooting",
        "Interactive"
      ]
    },
    {
      "id": "section-2",
      "heading": "Symptoms begin the inquiry; evidence decides the next step.",
      "paragraphs": [
        "Overcurrent protection responds to excessive current. Residual-current protection responds to an imbalance between outgoing and returning current."
      ],
      "items": [
        "Record where, when, and under what conditions it occurs.",
        "Distinguish overcurrent, residual current, an open path, and connection faults.",
        "Repeated trips, burning smell, or tingling metal: stop use and report."
      ]
    },
    {
      "id": "section-3",
      "heading": "Goals",
      "items": [
        "Classify troubleshooting paths by symptom.",
        "Reuse de-energizing, meter use, protective devices, and wiring logic.",
        "Recognize red lines that require stopping and escalation."
      ]
    },
    {
      "id": "section-4",
      "heading": "A row of kitchen receptacles is dead",
      "paragraphs": [
        "A coffee maker does not work, nearby receptacles are also dead, and the panel breaker appears not tripped.",
        "Wrong call: Immediately opening the first receptacle to look for a broken wire.",
        "Stop point: Start with external checks, protective devices, and safety signs; do not open energized devices.",
        "Reasoning path: Check GFCI reset, fully cycle breaker OFF/ON, loads and moisture; if needed, de-energize and trace upstream connections.",
        "Review: Integrated exam topics: GFCI downstream, breaker state, open neutral, loose connections, and stop points."
      ]
    },
    {
      "id": "section-5",
      "heading": "Core concepts",
      "items": [
        "First branch by symptom: dead, tripping, heating, miswired, intermittent.",
        "Troubleshooting moves from lower-risk external checks to higher-risk internal inspection.",
        "At each step ask: has this reached a point where licensed help is required?"
      ]
    },
    {
      "id": "tool-multimeter",
      "heading": "Digital Multimeter",
      "paragraphs": [
        "Measures voltage, continuity, and resistance so you verify instead of guess.",
        "Misuse and limits: Wrong jack or mode selection can damage the meter or create danger."
      ]
    },
    {
      "id": "tool-tester",
      "heading": "Non-contact Voltage Tester",
      "paragraphs": [
        "Quickly screens for possible voltage as an early warning.",
        "Misuse and limits: It is not proof of absence of voltage by itself; confirm with a suitable meter."
      ]
    },
    {
      "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-breaker",
      "heading": "Circuit Breaker",
      "paragraphs": [
        "Interrupts overloads or shorts to protect conductors.",
        "Misuse and limits: Do not hide trip problems by installing a larger breaker."
      ]
    },
    {
      "id": "tool-gfci",
      "heading": "GFCI Receptacle",
      "paragraphs": [
        "Detects current imbalance and trips quickly, common in damp locations.",
        "Misuse and limits: Reversing LINE/LOAD can break downstream protection or reset behavior."
      ]
    },
    {
      "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": [
        "Skipping GFCI and breaker state checks.",
        "Continuing tests after odor, heat, or sparking appears.",
        "Focusing on one receptacle and ignoring upstream/downstream relationships."
      ]
    },
    {
      "id": "section-13",
      "heading": "Safe Workflow",
      "items": [
        "Start with red flags: sparks, odor, heat, moisture, or damage means stop.",
        "External checks: loads, GFCI, breaker, and other points on the circuit.",
        "If a box must be opened, return to de-energize, lock/label, and verify.",
        "Record readings and symptoms, then narrow from upstream to downstream."
      ],
      "ordered": true
    },
    {
      "id": "quiz-1",
      "heading": "Why check GFCI first when a row of kitchen receptacles is dead?",
      "paragraphs": [
        "Because downstream receptacles may be protected by an upstream GFCI and lose power together when it trips."
      ]
    },
    {
      "id": "quiz-2",
      "heading": "What is the priority when odor or heat appears?",
      "paragraphs": [
        "Stop use, de-energize, keep safe, and escalate to qualified/licensed inspection."
      ]
    },
    {
      "id": "section-16",
      "heading": "Look Back",
      "links": [
        {
          "title": "Review Lesson 2: de-energize and verify before opening boxes.",
          "url": "https://elect-learn.org/en/lesson/02-deenergize-test-lockout/"
        },
        {
          "title": "Review Lesson 7: GFCI/breaker trips are clues.",
          "url": "https://elect-learn.org/en/lesson/07-breakers-gfci-afci-panel/"
        },
        {
          "title": "Review Lesson 11: troubleshooting verifies hypotheses; it is not trial wiring.",
          "url": "https://elect-learn.org/en/lesson/11-single-pole-switch-troubleshooting/"
        }
      ]
    }
  ],
  "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/"
  }
}