What is an essential safety practice before performing generator maintenance?

• A. Lockout/tagout (LOTO) and de-energize equipment; follow site safety procedures.
• B. Wear PPE and proceed without de-energizing.
• C. Only lockout if a supervisor is present.
• D. Keep doors closed and hope for safety.

Answer: (A)

Preventing unexpected energization is the key safety concept. Before doing maintenance on a generator, you must isolate the equipment from all energy sources and ensure it cannot be operated until work is finished. This is accomplished with lockout/tagout and de-energizing the machine, along with following the site’s safety procedures. Lockout/tagout creates a controlled state with a visible warning that the equipment is under maintenance, preventing others from re-energizing it. De-energizing removes electrical, hydraulic, pneumatic, and other stored energies that could cause startup or movement. Personal protective equipment helps protect you, but it does not make the equipment safe to work on if it could still re-energize. Relying on someone’s presence or simply keeping doors closed does not guarantee safety. So the essential practice is to implement LOTO, de-energize, and follow the established procedures.