NEC Commercial Electrical Practice Test

A continuous load is defined as a load where the maximum current is expected to continue for how many hours or more?

1. 1 hour

2. 2 hours

3. 3 hours

4. 4 hours

The correct answer is: 3 hours

A continuous load is defined as a load where the maximum current is expected to continue for three hours or more. This definition is important in electrical design and safety practices because it helps determine the appropriate sizing of conductors and overcurrent protection devices. When planning electrical installations, understanding the nature of continuous loads is crucial to prevent overheating of wires and other components which can result from prolonged use at maximum capacity. For example, if an electrical circuit is designed to supply power to equipment that operates consistently for extended periods, proper loading considerations must be made to ensure reliability and safety. This definition aligns with the National Electrical Code (NEC) guidelines, which emphasize the importance of factoring in continuous loads to maintain system integrity and reduce the risk of failure.