Conductors supplying more than one receptacle for portable loads must have an ampacity of at least what?

In the context of electrical installations, when dealing with conductors supplying multiple receptacles for portable loads, it is crucial for the ampacity of those conductors to meet or exceed the branch circuit rating. This requirement is in place to ensure that the conductors can safely handle the maximum load that could be drawn from the receptacles without overheating or causing a safety hazard.

The branch circuit rating is determined based on several factors, including the type of circuit, load calculations, and the types of devices that may be connected to it. By matching the conductor’s ampacity to this rating, you ensure that the entire circuit can operate safely under maximum load conditions, thus preventing the risk of overloading the conductors, which could lead to fire hazards or equipment damage.

Selecting a lower ampacity than the branch circuit rating would not provide adequate protection for the circuit, as it might lead to overheating during operation. Therefore, ensuring that the conductors have an ampacity that is at least equal to the branch circuit rating is essential for safety and compliance with electrical codes.

This understanding underscores why the correct answer highlights the importance of matching the conductors’ capabilities to the circuit they serve, ensuring both safety and functionality in electrical installations.