Safety
Lockout/Tagout (LOTO)
A safety procedure ensuring that dangerous machines are properly shut off and not restarted before maintenance is completed.
What is Lockout/Tagout (LOTO)?
Lockout/tagout (LOTO) is a safety procedure used in industry and construction to ensure that dangerous machines and energy sources are properly shut off, isolated, and not re-energized before maintenance or service work is completed.
The Six Steps
- **Preparation** — identify all energy sources
- **Shutdown** — turn off the machine
- **Isolation** — isolate the machine from energy sources
- **Lockout/Tagout** — apply locks and tags
- **Stored energy verification** — verify zero energy state
- **Verification** — test that the machine cannot be started
OSHA Standard
29 CFR 1910.147 — The Control of Hazardous Energy (Lockout/Tagout)
Common Energy Sources
- Electrical
- Hydraulic
- Pneumatic
- Thermal
- Chemical
- Gravitational
- Stored mechanical energy
Related Terms
- Job Safety Analysis (JSA)
A systematic process of identifying potential hazards associated with each step of a job task and developing safe work procedures.
- Safety Data Sheet (SDS)
A document that provides information on the properties of hazardous chemicals, including safe handling, storage, and emergency procedures.
- Electrical Safety
Safety practices and standards designed to protect workers from electrical hazards including shock, electrocution, burns, and fires.
- OSHA
Occupational Safety and Health Administration. The US federal agency that sets and enforces workplace safety standards.
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