[Title 29 CFR 1910.147]
[Code of Federal Regulations (annual edition) - July 1, 2002 Edition]
[Title 29 - LABOR]
[Subtitle B - Regulations Relating to Labor (Continued)]
[Chapter Xvii - OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT]
[Part 1910 - OCCUPATIONAL SAFETY AND HEALTH STANDARDS]
[Subpart J - General Environmental Controls]
[Sec. 1910.147 - The control of hazardous energy (lockout/tagout).]
[From the U.S. Government Printing Office]


29LABOR52002-07-012002-07-01falseThe control of hazardous energy (lockout/tagout).1910.147Sec. 1910.147LABORRegulations Relating to Labor (Continued)OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENTOCCUPATIONAL SAFETY AND HEALTH STANDARDSGeneral Environmental Controls
Sec. 1910.147  The control of hazardous energy (lockout/tagout).

    (a) Scope, application and purpose--(1) Scope. (i) This standard 
covers the servicing and maintenance of machines and equipment in which 
the unexpected

[[Page 489]]

energization or start up of the machines or equipment, or release of 
stored energy could cause injury to employees. This standard establishes 
minimum performance requirements for the control of such hazardous 
energy.
    (ii) This standard does not cover the following:
    (A) Construction, agriculture and maritime employment;
    (B) Installations under the exclusive control of electric utilities 
for the purpose of power generation, transmission and distribution, 
including related equipment for communication or metering; and
    (C) Exposure to electrical hazards from work on, near, or with 
conductors or equipment in electric utilization installations, which is 
covered by subpart S of this part; and
    (D) Oil and gas well drilling and servicing.
    (2) Application. (i) This standard applies to the control of energy 
during servicing and/or maintenance of machines and equipment.
    (ii) Normal production operations are not covered by this standard 
(See subpart 0 of this part). Servicing and/or maintenance which takes 
place during normal production operations is covered by this standard 
only if;:
    (A) An employee is required to remove or bypass a guard or other 
safety device; or
    (B) An employee is required to place any part of his or her body 
into an area on a machine or piece of equipment where work is actually 
performed upon the material being processed (point of operation) or 
where an associated danger zone exists during a machine operating cycle.
    Note: Exception to paragraph (a)(2)(ii): Minor tool changes and 
adjustments, and other minor servicing activities, which take place 
during normal production operations, are not covered by this standard if 
they are routine, repetitive, and integral to the use of the equipment 
for production, provided that the work is performed using alternative 
measures which provide effective protection (See subpart 0 of this 
part).
    (iii) This standard does not apply to the following.
    (A) Work on cord and plug connected electric equipment for which 
exposure to the hazards of unexpected energization or start up of the 
equipment is controlled by the unplugging of the equipment from the 
energy source and by the plug being under the exclusive control of the 
employee performing the servicing or maintenance.
    (B) Hot tap operations involving transmission and distribution 
systems for substances such as gas, steam, water or petroleum products 
when they are performed on pressurized pipelines, provided that the 
employer demonstrates that (1) continuity of service is essential; (2) 
shutdown of the system is impractical; and (3) documented procedures are 
followed, and special equipment is used which will provide proven 
effective protection for employees.
    (3) Purpose. (i) This section requires employers to establish a 
program and utilize procedures for affixing appropriate lockout devices 
or tagout devices to energy isolating devices, and to otherwise disable 
machines or equipment to prevent unexpected energization, start-up or 
release of stored energy in order to prevent injury to employees.
    (ii) When other standards in this part require the use of lockout or 
tagout, they shall be used and supplemented by the procedural and 
training requirements of this section.
    (b) Definitions applicable to this section.
    Affected employee. An employee whose job requires him/her to operate 
or use a machine or equipment on which servicing or maintenance is being 
performed under lockout or tagout, or whose job requires him/her to work 
in an area in which such servicing or maintenance is being performed.
    Authorized employee. A person who locks out or tags out machines or 
equipment in order to perform servicing or maintenance on that machine 
or equipment. An affected employee becomes an authorized employee when 
that employee's duties include performing servicing or maintenance 
covered under this section.
    Capable of being locked out. An energy isolating device is capable 
of being locked out if it has a hasp or other means of attachment to 
which, or through which, a lock can be affixed, or it has a locking 
mechanism built into it. Other energy isolating devices are capable of 
being locked out, if lockout

[[Page 490]]

can be achieved without the need to dismantle, rebuild, or replace the 
energy isolating device or permanently alter its energy control 
capability.
    Energized. Connected to an energy source or containing residual or 
stored energy.
    Energy isolating device. A mechanical device that physically 
prevents the transmission or release of energy, including but not 
limited to the following: A manually operated electrical circuit 
breaker; a disconnect switch; a manually operated switch by which the 
conductors of a circuit can be disconnected from all ungrounded supply 
conductors, and, in addition, no pole can be operated independently; a 
line valve; a block; and any similar device used to block or isolate 
energy. Push buttons, selector switches and other control circuit type 
devices are not energy isolating devices.
    Energy source. Any source of electrical, mechanical, hydraulic, 
pneumatic, chemical, thermal, or other energy.
    Hot tap. A procedure used in the repair, maintenance and services 
activities which involves welding on a piece of equipment (pipelines, 
vessels or tanks) under pressure, in order to install connections or 
appurtenances. It is commonly used to replace or add sections of 
pipeline without the interruption of service for air, gas, water, steam, 
and petrochemical distribution systems.
    Lockout. The placement of a lockout device on an energy isolating 
device, in accordance with an established procedure, ensuring that the 
energy isolating device and the equipment being controlled cannot be 
operated until the lockout device is removed.
    Lockout device. A device that utilizes a positive means such as a 
lock, either key or combination type, to hold an energy isolating device 
in a safe position and prevent the energizing of a machine or equipment. 
Included are blank flanges and bolted slip blinds.
    Normal production operations. The utilization of a machine or 
equipment to perform its intended production function.
    Servicing and/or maintenance. Workplace activities such as 
constructing, installing, setting up, adjusting, inspecting, modifying, 
and maintaining and/or servicing machines or equipment. These activities 
include lubrication, cleaning or unjamming of machines or equipment and 
making adjustments or tool changes, where the employee may be exposed to 
the unexpected energization or startup of the equipment or release of 
hazardous energy.
    Setting up. Any work performed to prepare a machine or equipment to 
perform its normal production operation.
    Tagout. The placement of a tagout device on an energy isolating 
device, in accordance with an established procedure, to indicate that 
the energy isolating device and the equipment being controlled may not 
be operated until the tagout device is removed.
    Tagout device. A prominent warning device, such as a tag and a means 
of attachment, which can be securely fastened to an energy isolating 
device in accordance with an established procedure, to indicate that the 
energy isolating device and the equipment being controlled may not be 
operated until the tagout device is removed.
    (c) General--(1) Energy control program. The employer shall 
establish a program consisting of energy control procedures, employee 
training and periodic inspections to ensure that before any employee 
performs any servicing or maintenance on a machine or equipment where 
the unexpected energizing, start up or release of stored energy could 
occur and cause injury, the machine or equipment shall be isolated from 
the energy source, and rendered inoperative.
    (2) Lockout/tagout. (i) If an energy isolating device is not capable 
of being locked out, the employer's energy control program under 
paragraph (c)(1) of this section shall utilize a tagout system.
    (ii) If an energy isolating device is capable of being locked out, 
the employer's energy control program under paragraph (c)(1) of this 
section shall utilize lockout, unless the employer can demonstrate that 
the utilization of a tagout system will provide full employee protection 
as set forth in paragraph (c)(3) of this section.

[[Page 491]]

    (iii) After January 2, 1990, whenever replacement or major repair, 
renovation or modification of a machine or equipment is performed, and 
whenever new machines or equipment are installed, energy isolating 
devices for such machine or equipment shall be designed to accept a 
lockout device.
    (3) Full employee protection. (i) When a tagout device is used on an 
energy isolating device which is capable of being locked out, the tagout 
device shall be attached at the same location that the lockout device 
would have been attached, and the employer shall demonstrate that the 
tagout program will provide a level of safety equivalent to that 
obtained by using a lockout program.
    (ii) In demonstrating that a level of safety is achieved in the 
tagout program which is equivalent to the level of safety obtained by 
using a lockout program, the employer shall demonstrate full compliance 
with all tagout-related provisions of this standard together with such 
additional elements as are necessary to provide the equivalent safety 
available from the use of a lockout device. Additional means to be 
considered as part of the demonstration of full employee protection 
shall include the implementation of additional safety measures such as 
the removal of an isolating circuit element, blocking of a controlling 
switch, opening of an extra disconnecting device, or the removal of a 
valve handle to reduce the likelihood of inadvertent energization.
    (4) Energy control procedure. (i) Procedures shall be developed, 
documented and utilized for the control of potentially hazardous energy 
when employees are engaged in the activities covered by this section.
    Note: Exception: The employer need not document the required 
procedure for a particular machine or equipment, when all of the 
following elements exist: (1) The machine or equipment has no potential 
for stored or residual energy or reaccumulation of stored energy after 
shut down which could endanger employees; (2) the machine or equipment 
has a single energy source which can be readily identified and isolated; 
(3) the isolation and locking out of that energy source will completely 
deenergize and deactivate the machine or equipment; (4) the machine or 
equipment is isolated from that energy source and locked out during 
servicing or maintenance; (5) a single lockout device will achieve a 
locked-out condition; (6) the lockout device is under the exclusive 
control of the authorized employee performing the servicing or 
maintenance; (7) the servicing or maintenance does not create hazards 
for other employees; and (8) the employer, in utilizing this exception, 
has had no accidents involving the unexpected activation or 
reenergization of the machine or equipment during servicing or 
maintenance.
    (ii) The procedures shall clearly and specifically outline the 
scope, purpose, authorization, rules, and techniques to be utilized for 
the control of hazardous energy, and the means to enforce compliance 
including, but not limited to, the following:
    (A) A specific statement of the intended use of the procedure;
    (B) Specific procedural steps for shutting down, isolating, blocking 
and securing machines or equipment to control hazardous energy;
    (C) Specific procedural steps for the placement, removal and 
transfer of lockout devices or tagout devices and the responsibility for 
them; and
    (D) Specific requirements for testing a machine or equipment to 
determine and verify the effectiveness of lockout devices, tagout 
devices, and other energy control measures.
    (5) Protective materials and hardware. (i) Locks, tags, chains, 
wedges, key blocks, adapter pins, self-locking fasteners, or other 
hardware shall be provided by the employer for isolating, securing or 
blocking of machines or equipment from energy sources.
    (ii) Lockout devices and tagout devices shall be singularly 
identified; shall be the only devices(s) used for controlling energy; 
shall not be used for other purposes; and shall meet the following 
requirements:
    (A) Durable. (1) Lockout and tagout devices shall be capable of 
withstanding the environment to which they are exposed for the maximum 
period of time that exposure is expected.
    (2) Tagout devices shall be constructed and printed so that exposure 
to weather conditions or wet and damp locations will not cause the tag 
to deteriorate or the message on the tag to become illegible.
    (3) Tags shall not deteriorate when used in corrosive environments 
such as areas where acid and alkali chemicals are handled and stored.

[[Page 492]]

    (B) Standardized. Lockout and tagout devices shall be standardized 
within the facility in at least one of the following criteria: Color; 
shape; or size; and additionally, in the case of tagout devices, print 
and format shall be standardized.
    (C) Substantial--(1) Lockout devices. Lockout devices shall be 
substantial enough to prevent removal without the use of excessive force 
or unusual techniques, such as with the use of bolt cutters or other 
metal cutting tools.
    (2) Tagout devices. Tagout devices, including and their means of 
attachment, shall be substantial enough to prevent inadvertent or 
accidental removal. Tagout device attachment means shall be of a non-
reusable type, attachable by hand, self-locking, and non-releasable with 
a minimum unlocking strength of no less than 50 pounds and having the 
general design and basic characteristics of being at least equivalent to 
a one-piece, all-environment-tolerant nylon cable tie.
    (D) Identifiable. Lockout devices and tagout devices shall indicate 
the identity of the employee applying the device(s).
    (iii) Tagout devices shall warn against hazardous conditions if the 
machine or equipment is energized and shall include a legend such as the 
following: Do Not Start, Do Not Open, Do Not Close, Do Not Energize, Do 
Not Operate.
    (6) Periodic inspection. (i) The employer shall conduct a periodic 
inspection of the energy control procedure at least annually to ensure 
that the procedure and the requirements of this standard are being 
followed.
    (A) The periodic inspection shall be perfomed by an authorized 
employee other than the ones(s) utilizing the energy control procedure 
being inspected.
    (B) The periodic inspection shall be conducted to correct any 
deviations or inadequacies identified.
    (C) Where lockout is used for energy control, the periodic 
inspection shall include a review, between the inspector and each 
authorized employee, of that employee's responsibilities under the 
energy control procedure being inspected.
    (D) Where tagout is used for energy control, the periodic inspection 
shall include a review, between the inspector and each authorized and 
affected employee, of that employee's responsibilities under the energy 
control procedure being inspected, and the elements set forth in 
paragraph (c)(7)(ii) of this section.
    (ii) The employer shall certify that the periodic inspections have 
been performed. The certification shall identify the machine or 
equipment on which the energy control procedure was being utilized, the 
date of the inspection, the employees included in the inspection, and 
the person performing the inspection.
    (7) Training and communication. (i) The employer shall provide 
training to ensure that the purpose and function of the energy control 
program are understood by employees and that the knowledge and skills 
required for the safe application, usage, and removal of the energy 
controls are acquired by employees. The training shall include the 
following:
    (A) Each authorized employee shall receive training in the 
recognition of applicable hazardous energy sources, the type and 
magnitude of the energy available in the workplace, and the methods and 
means necessary for energy isolation and control.
    (B) Each affected employee shall be instructed in the purpose and 
use of the energy control procedure.
    (C) All other employees whose work operations are or may be in an 
area where energy control procedures may be utilized, shall be 
instructed about the procedure, and about the prohibition relating to 
attempts to restart or reenergize machines or equipment which are locked 
out or tagged out.
    (ii) When tagout systems are used, employees shall also be trained 
in the following limitations of tags:
    (A) Tags are essentially warning devices affixed to energy isolating 
devices, and do not provide the physical restraint on those devices that 
is provided by a lock.
    (B) When a tag is attached to an energy isolating means, it is not 
to be removed without authorization of the authorized person responsible 
for it, and it is never to be bypassed, ignored, or otherwise defeated.

[[Page 493]]

    (C) Tags must be legible and understandable by all authorized 
employees, affected employees, and all other employees whose work 
operations are or may be in the area, in order to be effective.
    (D) Tags and their means of attachment must be made of materials 
which will withstand the environmental conditions encountered in the 
workplace.
    (E) Tags may evoke a false sense of security, and their meaning 
needs to be understood as part of the overall energy control program.
    (F) Tags must be securely attached to energy isolating devices so 
that they cannot be inadvertently or accidentally detached during use.
    (iii) Employee retraining.
    (A) Retraining shall be provided for all authorized and affected 
employees whenever there is a change in their job assignments, a change 
in machines, equipment or processes that present a new hazard, or when 
there is a change in the energy control procedures.
    (B) Additional retraining shall also be conducted whenever a 
periodic inspection under paragraph (c)(6) of this section reveals, or 
whenever the employer has reason to believe, that there are deviations 
from or inadequacies in the employee's knowledge or use of the energy 
control procedures.
    (C) The retraining shall reestablish employee proficiency and 
introduce new or revised control methods and procedures, as necessary.
    (iv) The employer shall certify that employee training has been 
accomplished and is being kept up to date. The certification shall 
contain each employee's name and dates of training.
    (8) Energy isolation. Lockout or tagout shall be performed only 
bythe authorized employees who are performing the servicing or 
maintenance.
    (9) Notification of employees. Affected employees shall be notified 
by the employer or authorized employee of the application and removal of 
lockout devices or tagout devices. Notification shall be given before 
the controls are applied, and after they are removed from the machine or 
equipment.
    (d) Application of control. The established procedures for the 
application of energy control (the lockout or tagout procedures) shall 
cover the following elements and actions and shall be done in the 
following sequence:
    (1) Preparation for shutdown. Before an authorized or affected 
employee turns off a machine or equipment, the authorized employee shall 
have knowledge of the type and magnitude of the energy, the hazards of 
the energy to be controlled, and the method or means to control the 
energy.
    (2) Machine or equipment shutdown. The machine or equipment shall be 
turned off or shut down using the procedures established for the machine 
or equipment. An orderly shutdown must be utilized to avoid any 
additional or increased hazard(s) to employees as a result of the 
equipment stoppage.
    (3) Machine or equipment isolation. All energy isolating devices 
that are needed to control the energy to the machine or equipment shall 
be physically located and operated in such a manner as to isolate the 
machine or equipment from the energy source(s).
    (4) Lockout or tagout device application. (i) Lockout or tagout 
devices shall be affixed to each energy isolating device by authorized 
employees.
    (ii) Lockout devices, where used, shall be affixed in a manner to 
that will hold the energy isolating devices in a ``safe'' or ``off'' 
position.
    (iii) Tagout devices, where used, shall be affixed in such a manner 
as will clearly indicate that the operation or movement of energy 
isolating devices from the ``safe'' or ``off'' position is prohibited.
    (A) Where tagout devices are used with energy isolating devices 
designed with the capability of being locked, the tag attachment shall 
be fastened at the same point at which the lock would have been 
attached.
    (B) Where a tag cannot be affixed directly to the energy isolating 
device, the tag shall be located as close as safely possible to the 
device, in a position that will be immediately obvious to anyone 
attempting to operate the device.
    (5) Stored energy. (i) Following the application of lockout or 
tagout devices to energy isolating devices, all potentially hazardous 
stored or residual energy shall be relieved, disconnected, restrained, 
and otherwise rendered safe.

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    (ii) If there is a possibility of reaccumulation of stored energy to 
a hazardous level, verification of isolation shall be continued until 
the servicing or maintenance is completed, or until the possibility of 
such accumulation no longer exists.
    (6) Verification of isolation. Prior to starting work on machines or 
equipment that have been locked out or tagged out, the authorized 
employee shall verify that isolation and deenergization of the machine 
or equipment have been accomplished.
    (e) Release from lockout or tagout. Before lockout or tagout devices 
are removed and energy is restored to the machine or equipment, 
procedures shall be followed and actions taken by the authorized 
employee(s) to ensure the following:
    (1) The machine or equipment. The work area shall be inspected to 
ensure that nonessential items have been removed and to ensure that 
machine or equipment components are operationally intact.
    (2) Employees. (i) The work area shall be checked to ensure that all 
employees have been safely positioned or removed.
    (ii) After lockout or tagout devices have been removed and before a 
machine or equipment is started, affected employees shall be notified 
that the lockout or tagout device(s) have been removed.
    (3) Lockout or tagout devices removal. Each lockout or tagout device 
shall be removed from each energy isolating device by the employee who 
applied the device. Exception to paragraph (e)(3): When the authorized 
employee who applied the lockout or tagout device is not available to 
remove it, that device may be removed under the direction of the 
employer, provided that specific procedures and training for such 
removal have been developed, documented and incorporated into the 
employer's energy control program. The employer shall demonstrate that 
the specific procedure provides equivalent safety to the removal of the 
device by the authorized employee who applied it. The specific procedure 
shall include at least the following elements:
    (i) Verfication by the employer that the authorized employee who 
applied the device is not at the facility;
    (ii) Making all reasonable efforts to contact the authorized 
employee to inform him/her that his/her lockout or tagout device has 
been removed; and
    (iii) Ensuring that the authorized employee has this knowledge 
before he/she resumes work at that facility.
    (f) Additional requirements--(1) Testing or positioning of machines, 
equipment or components thereof. In situations in which lockout or 
tagout devices must be temporarily removed from the energy isolating 
device and the machine or equipment energized to test or position the 
machine, equipment or component thereof, the following sequence of 
actions shall be followed:
    (i) Clear the machine or equipment of tools and materials in 
accordance with paragraph (e)(1) of this section;
    (ii) Remove employees from the machine or equipment area in 
accordance with paragraph (e)(2) of this section;
    (iii) Remove the lockout or tagout devices as specified in paragraph 
(e)(3) of this section;
    (iv) Energize and proceed with testing or positioning;
    (v) Deenergize all systems and reapply energy control measures in 
accordance with paragraph (d) of this section to continue the servicing 
and/or maintenance.
    (2) Outside personnel (contractors, etc.). (i) Whenever outside 
servicing personnel are to be engaged in activities covered by the scope 
and application of this standard, the on-site employer and the outside 
employer shall inform each other of their respective lockout or tagout 
procedures.
    (ii) The on-site employer shall ensure that his/her employees 
understand and comply with the restrictions and prohibitions of the 
outside employer's energy control program.
    (3) Group lockout or tagout. (i) When servicing and/or maintenance 
is performed by a crew, craft, department or other group, they shall 
utilize a procedure which affords the employees a level of protection 
equivalent to that provided by the implementation of a personal lockout 
or tagout device.
    (ii) Group lockout or tagout devices shall be used in accordance 
with the

[[Page 495]]

procedures required by paragraph (c)(4) of this section including, but 
not necessarily limited to, the following specific requirements:
    (A) Primary responsibility is vested in an authorized employee for a 
set number of employees working under the protection of a group lockout 
or tagout device (such as an operations lock);
    (B) Provision for the authorized employee to ascertain the exposure 
status of individual group members with regard to the lockout or tagout 
of the machine or equipment and
    (C) When more than one crew, craft, department, etc. is involved, 
assignment of overall job-associated lockout or tagout control 
responsibility to an authorized employee designated to coordinate 
affected work forces and ensure continuity of protection; and
    (D) Each authorized employee shall affix a personal lockout or 
tagout device to the group lockout device, group lockbox, or comparable 
mechanism when he or she begins work, and shall remove those devices 
when he or she stops working on the machine or equipment being serviced 
or maintained.
    (4) Shift or personnel changes. Specific procedures shall be 
utilized during shift or personnel changes to ensure the continuity of 
lockout or tagout protection, including provision for the orderly 
transfer of lockout or tagout device protection between off-going and 
oncoming employees, to minimize exposure to hazards from the unexpected 
energization or start-up of the machine or equipment, or the release of 
stored energy.
    Note: The following appendix to Sec. 1910.147 services as a non-
mandatory guideline to assist employers and employees in complying with 
the requirements of this section, as well as to provide other helpful 
information. Nothing in the appendix adds to or detracts from any of the 
requirements of this section.

     Appendix A to Sec. 1910.147--Typical Minimal Lockout Procedure

                                 General

    The following simple lockout procedure is provided to assist 
employers in developing their procedures so they meet the requirements 
of this standard. When the energy isolating devices are not lockable, 
tagout may be used, provided the employer complies with the provisions 
of the standard which require additional training and more rigorous 
periodic inspections. When tagout is used and the energy isolating 
devices are lockable, the employer must provide full employee protection 
(see 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.

                            Lockout Procedure

Lockout procedure for

________________________________________________________________________

(Name of Company for single procedure or identification of equipment if 
multiple procedures are used)

                                 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 employees perform any servicing or 
maintenance where the unexpected energization or start-up of the machine 
or equipment or release of stored energy could cause injury.

                      Compliance With This Program

    All employees are required to comply with the restrictions and 
limitations imposed upon them during the use of lockout. The authorized 
employees are required to perform the lockout in accordance with this 
procedure. All employees, upon observing 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.

________________________________________________________________________

Type of compliance enforcement to be taken for violation of the above.

                           Sequence of Lockout

    (1) Notify all affected employees 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.

________________________________________________________________________

Name(s)/Job Title(s) of affected employees and how to notify.

    (2) The authorized employee shall refer to the company procedure 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.

________________________________________________________________________


[[Page 496]]

________________________________________________________________________
Type(s) and magnitude(s) of energy, its hazards and the methods to 
control the energy.

    (3) If the machine or equipment is operating, shut it down by the 
normal stopping procedure (depress stop button, open switch, close 
valve, etc.).

________________________________________________________________________

Type(s) and location(s) of machine or equipment operating controls.
    (4) De-activate the energy isolating device(s) so that the machine 
or equipment is isolated from the energy source(s).

________________________________________________________________________

Type(s) and location(s) of energy isolating devices.

    (5) Lock out the energy isolating device(s) with assigned individual 
lock(s).
    (6) Stored or residual energy (such as that in capacitors, springs, 
elevated machine members, rotating flywheels, hydraulic systems, and 
air, gas, steam, or water pressure, etc.) must be dissipated or 
restrained by methods such as grounding, repositioning, blocking, 
bleeding down, etc.

________________________________________________________________________

Type(s) of stored energy--methods to dissipate or restrain.

    (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 equipment.

________________________________________________________________________

Method of verifying the isolation of the equipment.

    (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 or equipment to ensure that nonessential items have been removed 
and that the machine or equipment components are operationally intact.
    (2) Check the work area to ensure that all employees have been 
safely positioned or removed from the area.
    (3) Verify that the controls are in neutral.
    (4) Remove the lockout devices and reenergize the machine or 
equipment.
    Note: The removal of some forms of blocking may require 
reenergization of the machine before safe removal.
    (5) Notify affected employees that the servicing or maintenance is 
completed and the machine or equipment is ready for use.

[54 FR 36687, Sept. 1, 1989, as amended at 54 FR 42498, Oct. 17, 1989; 
55 FR 38685, 38686, Sept. 20, 1990]