NEC 2026 Compatible

A feeder supplies a continuous load of 150 amperes. The conductors are copper, Type USE-2, and will be directly buried in the earth in a trench with an ambient earth temperature of 77°F (25°C). There are 3 current-carrying conductors. What is the minimum size copper conductor required?

Master Level📋 NEC 310.15(B)(3), 215.2(A)(1)Wire Sizing & Ampacity
A

1/0 AWG

B

2/0 AWG

C

3/0 AWG

D

4/0 AWG

Explanation & Direct Citation

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