Does the casing of a metal electrical distribution box need to be grounded
Metal electrical boxes must be grounded because they are conductive components that enclose energized wires and connections. Yes — if you're running AC mains power (like 120V or 240V) into a metal enclosure, grounding is absolutely required. This is a basic safety rule that helps protect against electric shock and potential fire hazards if a short circuit occurs. For field technicians, correctly handling the physical connection between the casing and grounding is a core aspect of complying with electrical acceptance specifications.
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