Final answer:
True, a control circuit supplied by a separate 120 VAC source must have a disconnect according to standard electrical safety practices, which also marked as detailed in 6 0 . 2 ,including utilizing a three-wire system with safety features like grounding, protective casing, and thermal overload protection.
Therefore, the correct answer is: option 'true'.
Step-by-step explanation:
The given statement is true. According to standard electrical safety practices, all AC circuits, including control circuits, must have a means of disconnection to ensure they can be safely serviced or managed.
This is often achieved by a disconnect switch or by clearly marking the connection to ensure that anyone working on the circuit is aware of how to isolate the power.
Modern household and industrial wiring uses a three-wire system which includes several safety features like a neutral wire connected to ground at both the voltage source and user location, a protective appliance case, and a circuit breaker or fuse in series on the active wire to protect against thermal overload.
The proper implementation of these systems, including disconnects, helps ensure electrical safety by preventing electric shocks and other dangers associated with working on live circuits.