What does LOTO stand for?

LOTO stands for Lockout/Tagout: a safety procedure that controls hazardous energy so equipment can't start up while it's being serviced. A lockout physically secures an energy-isolating device with a lock; a tagout adds a warning tag. OSHA requires LOTO under standard 1910.147 to protect workers during maintenance.

The LOTO Process

Lockout/Tagout is named for the tags that are placed on the equipment as well as the locks and tags that are placed on its energy source when isolating power from the equipment. There are other, more unique types of LOTO devices available as well. The power running to the machine should be shut off by flipping a breaker switch or closing a valve during the LOTO procedures. The reason for this is because LOTO requires machines to be disconnected from all potential energy sources before employees perform routine maintenance or repair equipment. By controlling all energy sources directed at the equipment, there is less of a risk posed to the employee while he or she is performing tasks.

Physical tags are used for locking and tagging out equipment because they help create a clear and complete message regarding work taking place on that machine. Each tag has a space for the name of the authorized personnel who is the only one who is allowed to remove the tag from its safe energy isolating position. The removal of a tag is done only when the work taking place on the machine is complete. This is to make sure that no worker is in danger of the machine accidentally starting up resulting in harm to the worker.

29 CFR 1910.147 details OSHA’s standard LOTO procedure and includes the responsibilities that the employer holds in protecting their employees from hazardous energy. It also includes the employer’s responsibility in properly training employees regarding a lockout tagout procedure.