What is the minimum load computed for a required sign branch circuit?

The minimum load requirement for a branch circuit serving a sign is defined by the National Electrical Code (NEC). According to NEC guidelines, the minimum load for a branch circuit that is dedicated to signs is typically calculated at 1200 volt-amperes (VA). This requirement is established to ensure that the circuit can adequately support the electrical needs of the signs, providing enough capacity to prevent overloading and ensuring safe operation.

This requirement considers the various demands that might be placed on the circuit, such as different lighting, backlighting, or additional electrical components that may be part of the sign system. Using the standard of 1200 VA allows for flexibility and safety, as it accommodates potential surges in electrical demand that can occur when the sign is in operation.

The other options, such as 600 VA, 900 VA, and 1500 VA, do not align with the NEC’s specific guidelines for signage. Therefore, while these values may be applicable in different contexts, 1200 VA is the correct and code-compliant minimum load for a required sign branch circuit.