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Tuesday, April 25, 2017
Question:
Listing of NM (Romex)
Charlie, got into a discussion with a mechanical contractor about running NM through sealtite to an AC disconnect or condensing unit. Told him that it's a wet location and not permitted. So he asks if he strips the NM jacket and uses proper connectors is it legal?
What is the listing of the conductors once the NM jacket is removed?
Inspector vs Mechanical
Please omit my name
A
Answer:
Hey no name thanks for your question. NM cable is listed as a "cable" and is not allowed in wet locations as stated in 334.12(B)(4). The cable is intended to be stripped such as when making spices or terminations in enclosures but there is no exception that permits the conductors to be in a wet location. The conductors do not comply with 310.10(C) for use in a wet location. Maybe suggest to the mechanical contractor to stick with the mechanical codes and you will cover the electrical issues.