Locking Out of Equipment

Deactivating Equipment Procedure

a. Safety padlocks will be used to lock machine controls in the “OFF” position prior to inspection, maintenance or repair work.

b. Safety padlocks will be provided by the Safety Department to operations units and to designated maintenance personnel.

c. Safety padlocks will be provided with one key only. No locks will be keyed alike.

d. By use of multiple lock adapters, both maintenance and the involved area unit supervisor will place safety padlocks on the main switch and lock it in the open position.

e. If more than one maintenance craft is involved, each will attach his lock to the switch.

f. Both Maintenance and Operations personnel will try the switch or switches to be certain that the equipment has been deactivated.

g. As the mechanics finish their work, they will remove their locks, with the Operations lock being the last lock removed.

h. In the event of a change of mechanics, the mechanic being relieved will remove his lock and the relieving mechanic will apply his lock before starting to work.

NAME: Remote switches are not to be considered as lock-out points. Only main switches or breakers will be used to lock out equipment.


Valves which could result in Injury or damage if operated will be tagged out in accordance with Tag Out procedure. For high hazard systems, locking, blinding, or disconnecting is required by Operating Department standard operating procedures (Hot Work Permits or Entry Permits) in Ileti of tagging.

A standby man will be assigned by the supervisor of the work involved and will be continuously present outside the opening of the confined area when personnel are inside. The standby man will be instructed In the applicable rules and procedures and will be responsible for the safety of all personnel inside.

Rescue, retrieval and communications equipment will be in the immediate area. The standby man will be instructed that under no circumstances is he to enter the confined space’, during an emergency he will sound the alarm and assist rescuers from outside of the space.

A person entering a confined space will wear retrieval harness, life line and other prescribed equipment as determined by the hazard assessment.