LOCKOUT
6
330-ATJ-01-IMOT © 2020, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | www.wsps.ca
Figure 1
Energy forms, energy sources, and general lockout guidelines
Energy Form Energy Source General Lockout Guideline
Electrical Energy Power transmission lines
Machine power cords
Motors
Solenoids
Capacitors (stored
electrical energy)
Shut down the machine using acceptable
procedures. Isolate the hazardous energy –
depending on the task to be completed
this might be a local control or a main
disconnect
Lock and tag the isolation point
Be aware of any residual or stored energy.
Ensure you understand how to control
stored electrical energy according to
manufacturer's instructions. Only do so if
you have the correct tools and training
Hydraulic Energy Hydraulic systems
(e.g. hydraulic presses,
rams, cylinders hammers)
Shut off system in accordance with
manufacturer's instructions
Bleed off and blank lines as necessary
Lock and tag (with chains – if needed to
secure valve in a safe position, built-in
lockout devices, or lockout attachments
for valves), block any possible movement
of machinery
Pneumatic Energy Pneumatic systems (e.g.,
lines, pressure reservoirs,
accumulators, air surge
tanks, rams, cylinders)
Shut off system in accordance with
manufacturer's instructions
Bleed off excess air; if pressure cannot be
relieved, block any possible movement of
machinery
Lock and tag (with chains – if needed to
secure valve in a safe position, built-in
lockout devices, or lockout attachments
for valves). Block any possible movement
of machinery
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