The title says it all. If plastic or fiberglass is allowed by code, what if any cons would there be?

  • Is it for indoor or outdoor, is it flash mounted or box.
    – Ruskes
    Jun 19 at 1:43
  • Answer to the title is check your local codes.
    – Mazura
    Jun 19 at 1:44
  • indoor. I don't know what flash mounted is but it will go into a gyp wall so the outlet face is flush with the gyp, approx 8" from the breaker panel
    – MilkyTech
    Jun 21 at 13:26

1 Answer 1


Same cons as any application of a plastic box .vs. steel - not as sturdy, not as good at containing arcs and preventing a fire. Sturdy may come into play quicker with a 14-50 since the plug/unplug forces are considerable.

Code is a minimum, and barring location in an area with stricter modifications, to USA NEC a listed box of adequate size is allowed, for the most part. Some areas (or occupancies) do not allow plastic, but if plastic is allowed it's not generally limited to a particular size of outlet (but the box has to have suitable entrances for the wire/cable/conduit being used. And it does have to be of adequate size for "box fill" based on number and size of wires, and devices connected to wires. That takes a big box for wires typical of a 50A circuit.)

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