Electrician Red Seal · Question
A maintenance electrician is troubleshooting a 120 V ceiling fan in a commercial washroom that causes the GFCI breaker to trip occasionally. They determine the fan motor has developed a minor insulation breakdown. Which of the following grounding-related concepts is demonstrated by the GFCI tripping?
The GFCI tripping in response to a minor insulation breakdown in the fan motor demonstrates ground fault protection. A ground fault occurs when current leaks fr
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Question: A maintenance electrician is troubleshooting a 120 V ceiling fan in a commercial washroom that causes the GFCI breaker to trip occasionally. They determine the fan motor has developed a minor insulation breakdown. Which of the following grounding-related concepts is demonstrated by the GFCI tripping?
Answer options:
- Equipotential bonding ✅ Ground fault protection
- Surge protection
- Neutral-to-ground bond
Correct answer: Ground fault protection
Explanation: The GFCI tripping in response to a minor insulation breakdown in the fan motor demonstrates ground fault protection. A ground fault occurs when current leaks from the ungrounded conductor to ground. The GFCI detects this imbalance between the phase and neutral currents and trips, protecting against shock hazards, even when the fault current is too low to trip a standard breaker.
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- During a renovation of a commercial kitchen, an electrician needs to replace an old single-phase, 240 V, 5 kW
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