John wrote:
Many receptacles or switches have side screws that slightly protrude
outwards, especially after a wire has been screwed on. If you put two such
devices in a junction box, one device's hot could potentially touches the
adjacent one's neutral, touches a bare ground wire, or touches the metal
junction box.

What is the proper way to prevent this from happening?



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Don't think it is proper but I have seen fixtures with electrical tape
wrapped around them that would prevent a short. I agree with Tony the
chance of a short is remote if everything is put together correctly.