Control of Hazardous Energy
(Lockout/Tagout) 29 CFR 1910.147

What Is Lockout/Tagout?

"Lockout/Tagout (LOTO)" refers to specific practices and procedures to safeguard employees from the unexpected energization or startup of machinery and equipment, or the release of hazardous energy during service or maintenance activities.

Before performing service or maintenance and that the authorized employee(s) either lock or tag the energy-isolating device(s) to prevent the release of hazardous energy

Types of Lockout Devices
Locks
Tags
Wedges
Chains
Multi-lock hasps (5 locks per hasp)
Valve lockouts
Breaker/Fuse lockouts
Plug lockouts

Control of Hazardous Energy (Lockout/Tagout) 29
CFR 1910.147
They must be:
Identifiable
Durable
Standardized

Energy Sources
Electrical
Mechanical
Hydraulic
Pneumatic
Chemical
Thermal
Gravity
Other types of energy

When Must LOTO Be Used?
When servicing or maintaining equipment where:
Unexpected energization or start-up could occur
Or released stored energy could cause injury to employees

LOTO Exceptions
Work where hazardous energy does not exist
Activities performed during routine production processes
Work on cord or plug connected electrical equipment where it is controlled by the employee

Typical LOTO Procedures
Performing a shutdown, include testing machinery
Isolating equipment
Applying and removing lockout devices
Safely releasing stored energy

Affected Employees
Employees who
Operate
Work around
Occasionally adjust equipment that is subject to
LOTO

Authorized Employee
Recognizes hazardous energy
Types and magnitude of energy in the workplace
Means to isolate those types of energy

Authorized Employee
Responsibilities
Repair or service equipment as needed
Ensure that all energy sources are locked out
Test equipment to verify residual energy is dissipated
Place a “Danger—Do Not Operate” tag on equipment

Affected Employee Responsibilities
Notify maintenance, etc., when equipment needs repair or adjustment
Leave all LOTO devices in place
Verify equipment is safe to operate following
LOTO
Follow all safety rules while operating the equipment

Authorized Employee
Responsibilities
(cont.)
Obtain assistance when necessary
Remove locks and/or tags following LOTO
Coordinate multi-shift repair

VIOLATIONS OF LOTO
Use any lock for lockout
Leave keys in lock during lockout
Use someone else’s lock during lockout
No identification on lock