National Electrical Code (NEC) Article 230 Practice Exam

When combining multiple services in one location, what must be ensured?

Each service must have a single disconnect for simplicity.

All services can share a common disconnect.

Each service must have a separate disconnect unless a single service disconnect is approved.

In the context of the National Electrical Code (NEC), when multiple services are combined in one location, it is essential that each service has a separate disconnect unless a single service disconnect has been specifically approved by the authority having jurisdiction (AHJ). This requirement ensures that maintenance and emergency disconnecting can be performed safely and effectively for each service, allowing for individual control and reducing the risk of accidental energization when servicing equipment.

The requirement for separate disconnects supports safety protocols by preventing confusion and potential hazards that could arise from having multiple services operated by a single disconnect. It also facilitates clear identification of each service during inspections and maintenance, ensuring that each service can be de-energized independently without affecting others. This approach aligns with the NEC's emphasis on safety and operational clarity in electrical installations.

No specific requirements for service disconnects are necessary.