Branch-circuit conductors must have an ampacity not less than what?

Branch-circuit conductors must have an ampacity not less than the maximum load served. This is crucial for ensuring that the conductors can handle the highest amount of current that may flow through them during operation without overheating or becoming damaged. The National Electrical Code (NEC) emphasizes that conductors need to be sized appropriately to prevent safety hazards such as fire risks due to overheating, which can occur if conductors are undersized for the load.

Sizing branch-circuit conductors based on the maximum load also allows for a buffer against any potential overloads, ensuring the circuit remains functional and safe under varying conditions. By adhering to this requirement, electricians can ensure reliable electrical performance and compliance with safety standards.