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Are non-residential electrical questions on topic here? For example, this question, which asks about wiring a showcase light. There are special codes that deal with this type of wiring, which would not be familiar to DIYers that do primarily residential electrical work.

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In the past, we've considered commercial questions off topic, but allowing them if they were relevant to residential uses. I feel this is a good approach going forward since there's a limited pool of talent on the site that would know answers to commercial questions, and people asking these questions should really be hiring a professional as a cost of doing business.

Regarding the specific question being linked to above, I suspect an answer that doesn't get into commercial code requirements would help the OP and others in a residential environment equally. The standard "check your local codes" disclaimer would cover any concern of the OP doing work that may require a licensed electrician. So I lean towards leaving it open.

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