If the grounding conductor is connected through a raceway, does it need to be bonded at both ends?

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The grounding conductor does not need to be bonded at both ends when it is connected through a raceway. This is because the primary purpose of bonding is to ensure that there is a continuous path for ground fault current to minimize voltage differences that could be harmful. In the case of raceways, if the raceway itself is effectively grounding the equipment and maintaining a continuous grounding path, additional bonding at both ends is not necessary.

This is particularly relevant in installations where the raceway is designed to provide a low-resistance grounding path. The NEC (National Electrical Code) outlines that bonding requirements depend on the system and installation type, and in scenarios where effective grounding is already established through the raceway, additional bonding at both ends does not enhance the safety.

Other options, such as requiring bonding if the raceway is metal or if installed vertically, add conditions that do not pertain to the general requirement for bonding, simplifying the understanding that bonding at both ends is not a necessity in many scenarios.

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