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Chapter 23: Q23.8-19CQ (page 858)

A GFI may trip just because the live/hot and neutral wires connected to it are significantly different in length. Explain why.

Short Answer

Expert verified

The GFI will trip due to a substantial variance in currents running via cables of varying lengths.

Step by step solution

01

Definition of GFI

The ground-fault circuit interrupter, or GFCI, is a fast-acting circuit breaker that may shut off electric power in as little asof a second in the case of a ground fault.

02

Explanation

A ground fault interrupter (GFI) is a safety device that operates on the principle of electromagnetic induction. The currents in the live/hot and neutral wires are compared. If the wires' lengths differ significantly, the currents flowing through them are not equal; a longer wire carries less current, and vice versa.

Because the difference in length is large, the difference in currents is also significant. The difference is greater than a safe value, causing the GFI to trip.

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