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Electrical Code 3 Practice Test

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For a mobile home supplied with an optical fiber communications system and equipment, the grounding electrode shall be bonded to the metal frame or available grounding terminal with a copper conductor not smaller than what size?
Correct Answer:
12 AWG
Explanation:
The key idea is making sure the mobile home’s grounding system remains at the same electrical potential by providing a solid bonding path from the grounding electrode to the metal frame. For this bonding conductor, copper must be at least twelve gauge. This size gives a reliable, low-impedance path for fault currents without being unnecessarily bulky. Smaller conductors, like fourteen gauge, wouldn’t be adequate for this bonding task. Larger sizes (eight or ten) would meet the requirement but aren’t the minimum specified. Hence, the required not-smaller-than size is twelve AWG.

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