NEC 2026 Compatible

An industrial facility requires a 480V, 3-phase feeder to supply a motor control center with a calculated noncontinuous load of 200A. The conductors are copper with 75°C insulation (THWN). The ambient temperature in the area is consistently 45°C. What is the minimum size copper conductor required?

Master Level📋 NEC 310.16, 310.15(B)(2)(a)Wire Sizing & Ampacity
A

3/0 AWG THWN

B

4/0 AWG THWN

C

250 kcmil THWN

D

300 kcmil THWN

Explanation & Direct Citation

The correct answer is located in the National Electrical Code Section XXX.XX(Y)(Z). Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.

Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam.

Unlock the Answer & Explanation

Sign in to get 3 free questions with full explanations — no payment needed.

    Wire Sizing & Ampacity Practice Question: NEC 310.16, 310.15(B)(2)(a) | SparkShift | SparkShift