What is the maximum percentage of the branch circuit ampere rating for a cord-and-plug connected utilization equipment?

The maximum percentage of the branch circuit ampere rating for cord-and-plug connected utilization equipment is set at 80%. This rule is established under the National Electrical Code (NEC) to ensure safe operation and adequate capacity within electrical systems. By allowing a maximum connection at this percentage, it provides a margin for handling inrush currents or any fluctuating demand that equipment may impose, while also preventing overload on the circuit.

This guideline helps maintain the safety and reliability of the electrical system, as it reduces the risk of overheating and potential tripping of circuit breakers. Additionally, having this restriction in place encourages proper handling and use of electrical equipment, ensuring that users do not exceed the safe operational capacity of the circuit.