No big deal in putting one on, but was just
curious what the code requirements are, as I'm used to working with metal
rather than the plastic ones.
For a plastic box:
Regarding the bare ground wires that one twists together in the box, is it
required to still put a wire nut on them, even though they are twisted very
well together ?
Here a wirenut is a definate no-no. Using the ground screw in the box to
ensure a good bond is what they want. After that you need to use a bare
crimp. The plastic boxes we have still have a ground screw that will make
contact with whatever fixture, etc you install.
There is no exception in the code that excludes the Equipment Grounding
Conductors (EGCs) from the requirements of 110.14. So, yes you do have
to use a crimp sleeve, wire nut, or other listed means to join the EGCs
110.14 Electrical Connections.
(B) Splices. Conductors shall be spliced or joined with splicing devices
identified for the use or by brazing, welding, or soldering with a
fusible metal or alloy.
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