What must be done before working on energized equipment according to the NEC?

Before working on energized equipment, the National Electrical Code (NEC) emphasizes the importance of ensuring safety through de-energization and the implementation of lockout/tagout procedures. This is critical as it protects workers from electrical hazards by ensuring that the equipment is not inadvertently turned back on while work is being performed.

De-energization involves disconnecting the equipment from its power source to eliminate the risk of electrical shock or arc flash. Lockout/tagout procedures further enhance safety by requiring that the energy isolating devices be physically locked in the off position and that tags are placed which indicate that work is being performed. This creates a safety barrier that alerts other personnel not to operate the equipment.

Testing voltage levels or inspecting equipment for wear is prudent, but these actions should take place only after the equipment has been safely de-energized and secured. Covering equipment with insulating material might provide additional safety but does not replace the need for effective lockout/tagout measures. Thus, de-energization and implementing lockout/tagout procedures are indeed essential steps in adhering to NEC guidelines before commencing work on energized equipment.