Lockout is the term used to describe a procedure where the source of electrical power is removed and a lock is installed to prevent power from being turned on. OSHA requires a lockout before any electrical equipment is inspected, serviced or repaired. A danger tag also must be attached at the disconnect device.
According to McGill Electrical Product Group, Rosemont, Ill., a manufacturer of electrical safety products, lockout procedures are needed:
- When there is danger of being injured if equipment power is turned on.
- When there is equipment or machinery that does not need power to be on while maintenance is performed.
- When removing or bypassing a safety device, such as a machine guard.
- When the possibility exists of being caught in moving machinery.
- When clearing jammed electrical equipment.