What Is Lockout/Tagout (LOTO)? + Free Checklist
Lockout/Tagout (LOTO) is an OSHA-mandated safety procedure (29 CFR 1910.147) that prevents unexpected startup of machinery or release of hazardous energy during maintenance and servicing. LOTO protects workers from approximately 50,000 injuries and 120 deaths annually caused by uncontrolled energy release.
What is Lockout/Tagout?
Lockout/Tagout involves placing locks and tags on energy isolation devices to ensure equipment cannot be energized until maintenance is complete. "Lockout" physically prevents operation while "Tagout" provides warning identification. The goal is achieving a "zero energy state" before work begins.
Types of Hazardous Energy
- Electrical: AC/DC power, capacitors, batteries
- Mechanical: Springs, gravity, rotating parts
- Hydraulic: Pressurized fluid systems
- Pneumatic: Compressed air/gas
- Thermal: Hot/cold surfaces, steam
- Chemical: Reactive substances, process fluids
OSHA LOTO Requirements
- Written Program: Document energy control procedures for each machine
- Training: Authorized, affected, and other employees must be trained
- Periodic Inspection: Annual review of procedures
- Standardized Devices: Locks and tags must be substantial and standardized
The 6 Steps of LOTO
- Preparation: Identify energy sources and isolation devices
- Shutdown: Turn off equipment using normal procedures
- Isolation: Open/disconnect energy isolation devices
- Lock/Tag: Apply personal locks and tags
- Release Stored Energy: Dissipate or restrain residual energy
- Verification: Verify zero energy state before work
Related Resources
Free Checklist Templates
- Lockout Tagout (LOTO) Procedure - FREE Download
- LOTO Verification - FREE Download
- Lockout/Tagout (LOTO) Procedure - FREE Download