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For a feeder calculation, apply 100% of a 90-ampere noncontinuous load plus 125% of a 40-ampere continuous load. Ignoring other adjustments, what calculated ampacity results?

NASCLA Electrical exam practice question · Wiring & Protection

For a feeder calculation, apply 100% of a 90-ampere noncontinuous load plus 125% of a 40-ampere continuous load. Ignoring other adjustments, what calculated ampacity results?

  • A162.5 amperes
  • B104 amperes
  • 140 amperes
  • D130 amperes

Where to look it up

Explicit exercise assumptions; not a universal code requirement.

Why C is correct

90 + (1.25 × 40) = 90 + 50 = 140 amperes. This applies the stated calculation assumptions; conductor selection and any permitted exceptions require separate evaluation.

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