Which equipment is included in service equipment for a building?

Service equipment for a building encompasses the components that are essential for receiving, distributing, and protecting electrical power. This typically includes circuit breakers and fuses, along with their accessories.

Circuit breakers serve as automatic switches designed to protect an electrical circuit from damage caused by overload or short circuit. Fuses perform a similar protective function by breaking the circuit when the current exceeds safe levels. Accessories that may be included with these devices, such as mounting panels or overcurrent protective devices, help in the safe and effective management of electrical distribution systems.

By including both circuit breakers and fuses, this choice covers key elements responsible for both the interruption of current flow during fault conditions and the efficient distribution of electrical power throughout the building. This comprehensive range of equipment is critical for ensuring safety and functionality in an electrical system.

Transformers and relays, while important in electrical systems, do not fall under the category of "service equipment" as they serve different roles. Similarly, disconnect switches while also essential, do not encompass all the necessary protective devices and accessories like circuit breakers and fuses provide. Therefore, the defining characteristics of service equipment align with the selection made.