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Electricalaka: disconnect switchaka: safety switchaka: fusible disconnect

Disconnect

In Plain English

A switch or device that cuts power to a piece of equipment so it can be serviced safely.

Definition

A device that opens an electrical circuit so that equipment can be safely de-energized for maintenance or emergencies. The NEC requires disconnects within sight of equipment they serve, such as HVAC units, motors, and appliances. Disconnects can be fusible or non-fusible and may include lockout/tagout provisions.

Example

Each rooftop HVAC unit was provided with a lockable fusible disconnect mounted within sight of the unit.

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