The total rating of utilization equipment fastened in place other than luminaires shall not exceed what percentage of the branch circuit rating?

The total rating of utilization equipment fastened in place other than luminaires shall not exceed what percentage of the branch circuit rating?

• A. 25%
• B. 50%
• C. 75%
• D. 100%

Answer: (B)

The rule limits how much fixed, permanently installed equipment (other than luminaires) can be on a single branch circuit. The total rating of that utilization equipment must not exceed half of the branch-circuit rating. This creates room on the same circuit for lighting loads and other devices without overloading the circuit. For example, on a 20-amp circuit, the fixed equipment on that circuit can total up to 10 amps. The other percentages would either be too restrictive or too permissive, risking an overload when lighting or additional fixed loads are connected.

The rule limits how much fixed, permanently installed equipment (other than luminaires) can be on a single branch circuit. The total rating of that utilization equipment must not exceed half of the branch-circuit rating. This creates room on the same circuit for lighting loads and other devices without overloading the circuit. For example, on a 20-amp circuit, the fixed equipment on that circuit can total up to 10 amps. The other percentages would either be too restrictive or too permissive, risking an overload when lighting or additional fixed loads are connected.