A feeder carries 90 amperes noncontinuous and 40 amperes continuous. Ignoring other factors, what ampacity is required?

NASCLA Electrical exam practice question · Wiring & Protection

A feeder carries 90 amperes noncontinuous and 40 amperes continuous. Ignoring other factors, what ampacity is required?

A162.5 amperes
B104 amperes
140 amperes
D130 amperes

Why C is correct

The continuous portion is carried at 125 percent: forty amperes becomes fifty. Adding the ninety-ampere noncontinuous load yields one hundred forty amperes.

Practice 17 more Wiring & Protection questions

Timed mock exams, a wrong book and flashcards — one subscription covers every contractor exam line.

Start studying free

On a restaurant build-out during plan review, what is the primary hazard addressed by arc-fault circuit-interrupter protection?
On a warehouse conversion during plan review, a design requires surge-protective equipment at a dwelling service; what installation principle is important?
On a single-family remodel at final inspection, ground-fault protection of equipment trips during commissioning; what is the proper response?
On a restaurant build-out at final inspection, a contractor wants to rely on a series-rated combination; what must be verified?
On a warehouse conversion at final inspection, a dwelling service calculation exceeds the proposed main rating; what is the compliant response?
On a multifamily project at final inspection, a portable generator inlet can energize utility conductors because no transfer mechanism is installed; what is required?

A feeder carries 90 amperes noncontinuous and 40 amperes continuous. Ignoring other factors, what ampacity is required?

A feeder carries 90 amperes noncontinuous and 40 amperes continuous. Ignoring other factors, what ampacity is required?

More Wiring & Protection questions