A. If Type NM cables pass through factory or field-made openings in metal framing members, the cable must be protected by listed bushings or listed grommets that cover all metal edges. The protection ...
As EC&M reported here and here in June, the National Fire Protection Association (NFPA) issued two Tentative Interim Amendments (TIAs) to the 2020 edition of NFPA 70, National Electrical Code, which ...
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