Answer by JACK for How to determine electrical box size per NEC
Wires exiting have to be counted too. You'd need to add 4 for the two NM cables. Conduit lock nuts, NB snap and outside clamps are not counted in the fill calculations. The grounds leaving with the NM...
View ArticleAnswer by ThreePhaseEel for How to determine electrical box size per NEC
You count all wires that depart the boxWhen dealing with box fill, you have to count all the wires that depart the box (NEC 314.16(B)(1) is phrased "Each conductor that originates outside the box and...
View ArticleHow to determine electrical box size per NEC
Here is a quick exercise:Wires for two circuits are entering a junction box through one conduit.On the other end, the circuits split into two branchesTwo neutrals entering (current count = 2)Two hots...
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