Electrical Engineering (EE) Laws Practice Exam

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What is the function of an equipment grounding conductor (EGC)?

It stores energy to be used during faults.

It shields conductors from EMI.

It provides a low-resistance path to ground for fault current to reduce shock risk and enable protective devices to operate.

An equipment grounding conductor provides a low-resistance path to ground for fault current. In normal operation it carries little or no current, but if a fault causes a live conductor to contact a metal enclosure, the fault current travels through the EGC to earth. This strong path to ground drives the protective device (like a breaker) to trip quickly, reducing shock risk and keeping exposed parts at ground potential. It isn’t meant to store energy, shield against EMI, or deliver lighting; those functions come from other parts of the system.

It delivers lighting to a location.

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