A feeder supplies 70 amperes of noncontinuous load and 40 amperes of continuous load. Ignoring other factors, what minimum calculated ampacity is required?
- A88 amperes
- 120 amperes
- C110 amperes
- D137.5 amperes
Why B is correct
The continuous load contributes 40 times 1.25, or 50 amperes. Adding the 70-ampere noncontinuous load produces a feeder calculation of 120 amperes.