NEC 2026 Compatible

A feeder conductor is tapped to supply a panelboard. The tap conductor is 10 feet long and terminates in an overcurrent device rated for the tap conductor's ampacity. What is the minimum size of the tap conductor relative to the feeder overcurrent device rating, according to the 10-foot tap rule?

Journeyman Level📋 NEC 240.21(B)(1)Tap Rules
A

Equal to the feeder overcurrent device rating

B

Not less than 1/3 the ampacity of the feeder conductors

C

Not less than the rating of the overcurrent device at the load end

D

Not less than 1/10 the ampacity of the feeder conductors

Explanation & Direct Citation

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    Tap Rules Practice Question: NEC 240.21(B)(1) | SparkShift | SparkShift