Final answer:
It is false that a control circuit device can be used as the sole means for de-energizing circuits or equipment; other safety devices are required.
Step-by-step explanation:
The statement that a control circuit device, such as a push button, selector switch, or interlock, may be used as the sole means for de-energizing circuits or equipment is false. Electrical safety systems and devices, including circuit breakers and fuses, are designed to interrupt excessive currents to prevent thermal hazards. These devices, along with additional protective measures such as the three-wire system and ground fault circuit interrupters (GFCIs), enhance safety by guarding against both thermal and shock hazards. Control circuit devices alone are not sufficient to ensure de-energization and the safety of an electrical system.