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Hello Charlie, long time reader here. My name is Steve, I'm a Vermont electrician with a question about meter enclosures I'm hoping you can help me with. It would appear there is a dispute in just what the 1/4" knockouts on the bottom of your meters are really for.
Some say it's for the GEC (Grounding Electrode conductor), usually a bare #6 or #4 copper wire to simply run through. Others claim a 'Kenny Clamp' or other sort of listed connector is to be used. What is to code?....are the NEC passage(s) below being applicable
Thank you for your time, Steve Vermont Electrician
Hey Steve thanks for your question. Holes can be provided in enclosures by manufacturers for a variety of purposes including drainage and ventilation. Knockouts are also often provided to be used for ease in installing connectors to enclosures but are not provided in all enclosures. The enclosure manufacturer should be able to tell you what theirs are intended to be used for. There is no specific requirement in the NEC to secure grounding electrode conductors (GEC) to enclosures or to provide a specific bushing or fitting. See 250.64(E)
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