The metal box of the distribution box, the electrical installation board, and the metal base and casing of the electrical appliances in the box must be grounded. The protective neutral wire should be reliably connected through the terminal board. 26 (Clearance. Power from factory ground must be installed by a qualified electrician. Each DISTRIBUTION BOX and controller must be grounded. Grounding of the units: Attach a ground wire from one of. Here are the steps on how to ground a power distribution box: 1. Make sure all tools are intact to prevent accidents during the grounding. Inspector is telling us these need to be grounded even though they're pass throughs. I've done it this way a hundred times and never had an issue until now. His reasoning is that it changes the pvc to the gear so the conduit isn't bonded to the gear going into the box but my thought on that is that. Understand key IEEE standards for electrical enclosures—covering safety, grounding, shielding, and durability—and how to apply them in real projects.
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