Using K = 12.9, a one-way length of 150 feet, 30 amperes, and a permitted 6-volt drop, what circular-mil area results from CM = 2KIL ÷ VD?
- A38,700 cmil
- B15,480 cmil
- C9,675 cmil
- 19,350 cmil
Why D is correct
Substitute the supplied values: 2 × 12.9 × 30 × 150 ÷ 6 = 19,350 circular mils. A permitted conductor must then be selected at or above the result.