What size copper conductor feeds a bathroom GFCI receptacle according to code?

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Multiple Choice

What size copper conductor feeds a bathroom GFCI receptacle according to code?

Explanation:
Bathrooms must be fed by a 20-amp branch circuit for receptacles, and the conductor must be sized to carry 20 amps. The smallest copper conductor rated for 20 amps is 12 AWG, so it meets the requirement. Smaller wire like 14 AWG is only rated for 15 amps and wouldn’t satisfy the 20-amp rule. Larger sizes such as 10 AWG or 8 AWG would work but aren’t necessary for a standard bathroom on a 20-amp circuit.

Bathrooms must be fed by a 20-amp branch circuit for receptacles, and the conductor must be sized to carry 20 amps. The smallest copper conductor rated for 20 amps is 12 AWG, so it meets the requirement. Smaller wire like 14 AWG is only rated for 15 amps and wouldn’t satisfy the 20-amp rule. Larger sizes such as 10 AWG or 8 AWG would work but aren’t necessary for a standard bathroom on a 20-amp circuit.

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