Electrical Engineering › Section B · Resistance, Ohm's law, power, and energy › Topic B.6
Circuit breakers, GFCIs, fuses, and safety
Too much current overheats wires and starts fires, and a small current through the body can kill. Fuses, breakers and ground-fault interrupters exist to stop both, and understanding how they work is part of working safely with electricity.
In this topic
- Why circuits need protection
- Fuses
- Circuit breakers
- Worked example: a kitchen circuit
- Electricity and the body
- Worked example: dry hands and wet hands
- Ground-fault circuit interrupters
- Worked example: a leaking appliance
- Grounding, AFCIs and safe practice
- Common mistakes to avoid
- Key takeaways
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