Which of the following is a critical safety step when dealing with electrical systems?

Lock-out tag-out is a critical safety step when dealing with electrical systems because it ensures that all energy sources are properly shut off and cannot be unexpectedly re-engaged while maintenance or repair work is being performed. This practice involves placing physical locks and tags on switches and circuit breakers to signal that equipment is not to be operated, providing a vital layer of safety for workers.

Implementing lock-out tag-out procedures prevents accidental energization of electrical systems, which could lead to severe injuries or fatalities. It establishes a clear communication protocol that protects those working on or near electrical equipment by ensuring that everyone on-site is aware of the current status of the power supply. Such protocols are essential for maintaining a safe work environment, especially in complex electrical systems where multiple power sources may be present.

While turning off all power sources, wearing insulated gloves, and using a multimeter are important aspects of working with electrical systems, none offer the comprehensive safety assurance that lock-out tag-out provides. Turning off power ensures immediate safety from electric shock, but without the assurance that no one else can restore power during servicing, risk remains. Insulated gloves offer personal protection but do not eliminate the possibility of hazardous conditions arising from energization. A multimeter is a useful tool for testing and troubleshooting but