Fastened-in-place utilization equipment that is connected to a branch circuit with other loads shall not exceed ___ percent of the branch circuit rating.

• A. 50
• B. 75
• C. 80
• D. 100

Answer: (A)

The rule focuses on how to apportion a branch circuit’s capacity when multiple loads share it, specifically for fastened-in-place utilization equipment. When such fixed equipment shares a circuit with other loads, the code restricts how much of the circuit’s rating it can use. Limiting that equipment to half the circuit rating ensures there’s enough headroom for the other devices (and for startup surges or fluctuating demand) without overloading the circuit.

So, on a typical circuit, the fixed equipment can use up to 50 percent of the circuit’s rating if there are other loads present. If there were no other loads on the circuit, the calculation would be different, but with multiple loads, 50 percent is the safe cap.