Branch circuit conductors must have an ampacity that is what in relation to the maximum to be served?

Branch circuit conductors must have an ampacity that is not less than the maximum current they are expected to carry. This requirement ensures that the conductors can safely handle the electrical load without overheating or risking damage, which can lead to electrical fires or equipment failure.

It is crucial for safety standards that the conductors are adequately sized for the anticipated load. If the ampacity were to be equal, greater than, or slightly less than the maximum load, it could pose risks; for example, if conductors are only equal to the load, any fluctuations or surges in current could result in overheating. Therefore, by specifying that conductors must have an ampacity that is not less than the maximum, it supports a safety margin that accommodates typical load variations and maintains system integrity.