Lockout Definitions

Lock Out Applies if:

Machinery or equipment is in use for normal production work, and a work activity creates a risk of injury to workers from the movement of the machinery or equipment. Also if there is exposure to an energy source, and the machinery or equipment is not effectively safeguarded to protect the workers from the risk.

Machinery or equipment is shut down for maintenance, no work may be done until

  1. All parts and attachments have been secured against inadvertent movement,
  2. Where the work will expose workers to energy sources, the hazard has been effectively controlled, and
  3. The energy isolating devices have been locked out as required.

Clearing a jam-up exposes a worker to energized equipment, or if using a tool becomes a hazard when exposed to energized equipment.

A lockout cannot be performed when there is a power disruption, as proper lockout cannot be verified without power.

"control system isolating device"  means a device that physically prevents activation of a system used for controlling the operation of machinery or equipment;

"energy isolating device"  means a device that physically prevents the transmission or release of an energy source to machinery or equipment;

"energy source"  means any electrical, mechanical, hydraulic, pneumatic, chemical, thermal, or other source of energy of potential harm to workers;

"key securing system"  means a system which physically prevents access to keys when locks or positive sealing devices are applied in a group lockout procedure;

"lockout"  means the use of a lock or locks to render machinery or equipment inoperable or to isolate an energy source in accordance with a written procedure;

"maintenance"  means work performed to keep machinery or equipment in a safe operating condition, including installing, repairing, cleaning, lubricating and the clearing of obstructions to the normal flow of material;

"normal production"  means work that is routine, repetitive, and integral to the normal use of machinery or equipment for production;

"personal lock"  means a lock provided by the employer for use by a worker to ensure personal lockout protection such that each lock when applied is operable only by a key in the worker's possession, and by a key under the control of the supervisor or manager in charge.