Cord and plug connected appliances shall not exceed what percentage of the branch-circuit rating?

Cord and plug connected appliances are designed to limit the amount of current drawn to ensure safety and prevent overloads on branch circuits. According to the National Electrical Code (NEC), the maximum loading of branch circuits is typically set at 80% of the branch circuit rating. This rule is in place to allow for a buffer to accommodate the inrush current or other temporary fluctuations in electricity usage that might occur when multiple appliances are connected and in operation.

By adhering to this 80% guideline, electricians can ensure that the circuit operates within a safe range, reducing the risk of tripping circuit breakers or causing overheating of wires and devices. This standard plays an essential role in maintaining the overall safety and reliability of residential electrical systems, ensuring that circuits are not overloaded.

Other options may suggest higher percentages, but those would not provide the necessary safety margin that 80% offers. Therefore, the appropriate percentage for cord and plug connected appliances to not exceed is indeed 80% of the branch-circuit rating.