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Wednesday, September 30, 2020
Question:
Hello CQD,
Thank you for providing this service to the Industry. Trying to install an old work single gang box into a finished wall and feeding the box with MC. Are there any Code restrictions with using a plastic box (one example would be Arlington F101) that has Trade Size 1”2” openings with a metallic conduit such as MC or Steel flex?
Thank you again,
Rick Harrahill
A
Answer:
Hi Rick,
No restriction if the box is suitable (identified) for use with MC cable. The concern would be to ensure that an equipment grounding means extended to the device and that the armor of the MC cable is grounded. Installation instructions provided by manufacturers often provide the needed information. See NEC 110.3(B).