The device, or group of devices, that can disconnect the conductors of a circuit from their source is called what?

• A. Disconnecting Means
• B. Switch Gear
• C. Isolator
• D. Service Disconnect

Answer: (A)

Disconnecting means are the devices that can disconnect all conductors of a circuit from their source, allowing the circuit to be completely de-energized for service or maintenance. This can be a single switch or circuit breaker, or a group of devices arranged together to interrupt all of the conductors. That exact function is what the term describes, which is why it’s the best match for the question.

A switch gear is a broader assembly that houses switches and protective devices, not the act of disconnecting itself. An isolator provides isolation and a visible break but isn’t intended to interrupt current under load. A service disconnect is the main disconnect at the service entrance, not the general disconnecting means that can be applied to any circuit.