LOCKOUT
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330-ATJ-01-IMOT © 2020, Workplace Safety & Prevention Services (WSPS)
1 877 494 WSPS (9777) | 905 614 1400 | www.wsps.ca
Energy Form Energy Source General Lockout Guideline
Kinetic Energy
(energy of a moving
object or materials
moving; an object
may be powered or
coasting)
Rotating Blades
Flywheels
Materials in supply lines
or bins or silos
Isolate all energies that can create
equipment motion
Ensure that all motions are stopped
Block material from moving into area
of work
Potential Energy
(stored energy that
an object has the
potential to release
due to its position)
Springs
Actuators
Counterweights
Raised loads
If possible, lower all suspended parts and
loads to the lowest position
Block parts that might move due to gravity
Release or block spring energy
Thermal Energy Supply lines
Storage tanks and vessels
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
Bleed off excess liquids or gases. Blank lines
as necessary
Locks
For personal protection, it is important that each person working on a machine places their personal
lock to secure the energy isolating devices. The use of an information tag is a means of communication
and should provide details of work being done (see figure 2). Only when the work is completed, may
each worker remove his/her lock. Note: A work permit may not be used at all workplaces, so follow the
employer's lockout policy on completed work
Figure 2
A locked out and tagged disconnect switch
WSPS.CA
