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Wednesday, October 21, 2020

Question:

Hello Friends,
 
Is it permissible by Code to install a 10 AWG copper, bare, solid wire in metallic electrical tubing (EMT)? The tubing is installed on the exterior of a building, and there are no conductor fill issues.
 
Alex Curry 
A

Answer:

Hi Alex,

Thanks for participating. The equipment grounding conductors are permitted to be insulated, covered, or bare. See 250.118(1), which reads as follows: The equipment grounding conductor run with or enclosing the circuit conductors shall be one or more or a combination of the following: (1) A copper, aluminum, or copper-clad aluminum conductor. This conductor shall be solid or stranded; insulated, covered, or bare; and in the form of a wire or a busbar of any shape.

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