Code Q&A: Sizing Branch-Circuit Conductors

Code Q&A: Sizing Branch-Circuit Conductors

NEC guidelines for sizing branch-circuit conductors

Q. What is the Code requirement for sizing branch-circuit conductors?

Find the Answer

A. Branch-circuit conductors must have an ampacity of not less than the maximum load to be served. Conductors must be the larger of 210.19(A)(1)(a) or (b):

(a) Conductors must be sized no less than 125% of the continuous loads, plus 100% of the noncontinuous loads, based on the terminal temperature rating ampa

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