NEC 2026 Compatible

Where the ampacity of a conductor does not correspond to a standard overcurrent device rating, the next higher standard rating may be used only if the conductor ampacity does not exceed:

Journeyman Level📋 NEC 240.4(B)Overcurrent Protection
A

400 amperes

B

600 amperes

C

800 amperes

D

1000 amperes

Explanation & Direct Citation

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    Overcurrent Protection Practice Question: NEC 240.4(B) | SparkShift | SparkShift