Branch Circuits & WiringQuestion 189 of 521

How are conductors that both originate and terminate within the box (such as short pigtails or jumpers) treated in a box-fill calculation?

a.They are not counted
b.They count as one each
c.They count as two each
d.They count as clamp allowances

Explanation

Per 314.16(B)(1), a conductor that originates and terminates within the box, such as a pigtail, is not counted in the box fill. Only conductors that enter and are not spliced (or that terminate on a device) get an allowance.

Law Reference: 2023 NEC §314.16(B)(1)

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