148 doesn't play favorites: The code mandates that all metallic parts of electrical boxes must bond to ground—no exceptions for cabinet doors. Bottom line: That door is part of the enclosure. Skip the grounding, and you're gambling with safety. In factories, construction sites, and even commercial buildings, this question pops up all the time. Your boss might insist on it, while your. Today, we're diving deep into the world of distribution box grounding, breaking down the standards, and shining a light on those sneaky mistakes that even experienced electricians sometimes make. The neutral wire is just as important. They should never be connected together downstream of the service equipment, such as in subpanels or other parts of the circuits.
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