Which of the following is a true statement about EPO switches?

EPO (Emergency Power Off) switches are critical safety devices in electrical and mechanical systems. The statement that they should have some type of signaling to indicate operation is accurate because signaling provides visual or auditory confirmation that the EPO switch is engaged. This feature enhances safety by ensuring that personnel are aware of the operational status of the switch, which is essential in emergency situations where immediate shutdown of power is necessary. An indicator helps prevent confusion and allows for a quick response if the need arises to reset or re-engage systems safely.

In contrast, other statements about EPO switches do not hold true. The assumption that they can be operated without any restrictions overlooks the safety protocols and operational guidelines that govern their use. The idea that they require a single-step operation may be misleading, as some may involve verification or specific procedures to ensure safety before resetting or re-engaging power. Lastly, while EPO switches are influenced by safety standards, not all are directly covered by the National Electrical Code (NEC), which mainly addresses wiring and electrical installations rather than the specific operation of emergency switches.