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What is the smallest copper wire size permitted by the national electric code for a 20 amp single phase electrical circuit?
Wiki User
∙ 11y ago
I think you mean either what is the correct size or minimum wire size needed when a branch circuit is protected by a 20 A breaker. The size is 12 American Wire gauge (AWG). 14 AWG is used for 15 A circuit and 10 AWG for a 30 A breaker. The lower the gauge the larger the cross-section of the wire.
Wiki User
∙ 14y ago
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