
2-2 WM doc 3/8/21 General Safety
General Safety
Electrical Lockout Procedures
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TO CONTROL MAINTENANCE DANGERS:
Lockout procedures must be followed (see OSHA regula-
tion 1910.147).
Never rely on machine stop control for maintenance safety
(emergency stops, on/off buttons, interlocks).
Do not reach into moving blades or feed systems. Allow all
coasting parts to come to a complete stop.
Electrical power supply and air supply must both be locked
out.
Where established lockout procedures cannot be used
(electrical troubleshooting or mechanical dynamic trouble-
shooting), alternative effective protective techniques shall
be employed which may require special skills and plan-
ning.
Always follow safe operations practices in the workplace.
EQUIPMENT LOCKOUT PROCEDURE
Lockout procedures per OSHA regulation 1910.147, appen-
dix A:
GENERAL
The following simple lockout procedure is provided to assist
owner/operators in developing their procedures so they meet
the requirements of OSHA regulation 1910.147. When the
energy isolating devices are not lockable, tagout may be
used, provided the owner/operator complies with the provi-
sions of the standard which require additional training and
more rigorous periodic inspections. When tagout is used and
the energy isolating devices are lockable, the owner/operator
must provide full operator protection (see OSHA regulation
1910.147, paragraph (c)(3)) and additional training and more
rigorous periodic inspections are required. For more complex
systems, more comprehensive procedures may need to be
developed, documented, and utilized.
PURPOSE
This procedure establishes the minimum requirements for the
lockout of energy isolating devices whenever maintenance or
servicing is done on machines or equipment. It shall be used
to ensure that the machine or equipment is stopped, isolated
from all potentially hazardous energy sources and locked out
before personnel perform any servicing or maintenance
where the unexpected enervation or start-up of the machine
or equipment or release of stored energy could cause injury.
COMPLIANCE WITH THIS PROGRAM
All personnel are required to comply with the restrictions and
limitations imposed upon them during the use of lockout. The
authorized personnel are required to perform the lockout in
accordance with this procedure. All operators, upon observ-
ing a machine or piece of equipment which is locked out to
perform servicing or maintenance shall not attempt to start,
energize, or use that machine or equipment.
SEQUENCE OF LOCKOUT
1. Notify all affected personnel that servicing or maintenance is
required on a machine or equipment and that the machine or
equipment must be shut down and locked out to perform the
servicing or maintenance.
2. The authorized employee shall refer to the company proce-
dure to identify the type and magnitude of the energy that the
machine or equipment utilizes, shall understand the hazards
of the energy, and shall know the methods to control the
energy.
3. If the machine or equipment is operating, shut it down by the
normal stopping procedure (depress the stop button, open
switch, close valve, etc.).
4. De-activate the energy isolating device(s) so that the
machine or equipment is isolated from the energy source(s).
5. Lock out the energy isolating device(s) with assigned individ-
ual lock(s).
6. Stored or residual energy (such as that in capacitors, springs,
elevated machine members, rotating flywheels, hydraulic sys-
tems, and air, gas, steam, or water pressure, etc.) must be
dissipated or restrained by methods such as grounding, repo-
sitioning, blocking, bleeding down, etc.
7. Ensure that the equipment is disconnected from the energy
source(s) by first checking that no personnel are exposed,
then verify the isolation of the equipment by operating the
push button or other normal operating control(s) or by testing
to make certain the equipment will not operate.
CAUTION! Return operating control(s) to neutral or
"off" position after verifying the isolation of the equip-
ment.
8. The machine or equipment is now locked out.
RESTORING EQUIPMENT TO SERVICE
When the servicing or maintenance is completed and the
machine or equipment is ready to return to normal operating
condition, the following steps shall be taken.
1. Check the machine or equipment and the immediate area
around the machine to ensure that nonessential items have
been removed and that the machine or equipment compo-
nents are operationally intact.
2. Check the work area to ensure that all personnel have been
safely positioned or removed from the area.
3. Verify that the controls are in neutral.
4. Remove the lockout devices and re-energize the machine or
equipment.
NOTE: The removal of some forms of blocking may
require re-enervation of the machine before safe
removal.
5. Notify affected personnel that the servicing or maintenance is
completed and the machine or equipment is ready for use.
PROCEDURE INVOLVING MORE THAN ONE PERSON
In the preceding steps, if more than one individual is required
to lock out the equipment, each shall place his own per-
sonal lock on the energy isolating devices.