3.1
SECTION 3 – MAINTENANCE & TROUBLESHOOTING
SAFETY DURING MAINTENANCE AND TROUBLESHOOTING
“Lock-out”, or “Lock-out Tag-out” are terms that refer to procedures taken to prevent the unexpected start-up, or other re-
lease of energy, by a machine, whenever anyone is required to remove or bypass safety guards or devices, or whenever
anyone is required to place part of his/her body in a hazard area.
In almost all jurisdictions, it is required that owners of industrial equipment establish and post lock-out procedures. Know
and use the lock-out procedures of your company or organization. In the absence, of such posted procedures, use the
following procedure.
LOCK OUT PROCEDURE
Whenever work is to be performed on a machine, which requires removal or bypassing of safety guards or devices, or the
placement of part of anyone’s body in a hazard area, the following steps shall be taken:
1. Operator shuts down the machine.
2. The supervisor in charge of the machine must be informed of the intention to Lock-out the machine.
3. The FEEDER power which supplies power to the machine and which is connected to the machine via the
Power Junction Box (see picture below) must be turned OFF and locked in the OFF (0) position by means of
a padlock. The key for this padlock must be kept by the person performing the work on the machine. If more
than one person is performing work on the machine, then a multiple lock hasp shall be used, and each person
shall apply his or her own lock to the hasp.
4. The Machine Power Disconnect Switch must be turned OFF, and locked in the OFF (0) position by means of
a padlock. The key for this padlock must be kept by the person performing the work on the machine. If more
than one person is performing work on the machine, then a multiple lock hasp shall be used, and each person
shall apply his or her own lock to the hasp.
5. Prior to starting any work on the locked-out machine, the supervisor shall attempt to start the machine to
ensure that the lock-out device provides adequate protection. Operating controls must be reset to the “OFF”
position after this test.
6. Work on the locked-out machine may now proceed.
Machine disconnect switch used for
safety lockout purposes.
Special door lock.
Power Junction Box.
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