Friday, November 27, 2009


1.0 PURPOSE :-

To provide guidelines or locking out equipment or machinery. Electrical and non-electrical

systems are locked out to prevent unexpected energization, start-up or release of stored energy.

The lock-out device is a mechanism that allows the use of a padlock to hold switch, lever or valve

handle in the “off” position. In the market switches and valves are availables with buit-in lock

out device. However, where such arrangement is not available, it should be modified so that

locks can be used.


2.1 Turn off equipment or machine at the point of operation.

2.2 Isolate the equipment by operating/disconnecting the switch, valve or any other energising device. Ensure stored energy such as rotating fly-wheels hydraulic systems, air or steam pressure etc. are dissipated.

2.3 Lock operation lever in the “off” position with a locking device. If multilock device is provided, then ensure each person involved to place a separate lock retains his key.

2.4 Follow an established lock-out procedures (see chapter 11.0) for Electrical Lock-Out procedures for required guidance.

2.5 Test machine controls and switches to ensure that they are in “off” position.

2.6 Display warning sign such as : “Danger – Men At Work “.

2.7 On completion of job the Lock-Out Counterfoil is filled in by the supervisor, who will then check the details and then order the employee to whom the lock was assigned to remove the lock.


1. If equipment or machinery cannot be locked out then the source of energy must be tagged.

2. Mere removal of a fuse may not guarantee energy cut-off.

Some machines use a combination of power sources. Ensure all alternate sources of energy are disconnected and / or dissipated.

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