Control of Hazardous Energy — Lockout/Tagout (29 CFR 1910.147)
The Lockout/Tagout standard requires employers to establish procedures for isolating energy sources during equipment servicing and maintenance. Failure to control hazardous energy causes approximately 50,000 injuries and 120 deaths annually.
What 29 CFR 1910.147 Requires
Lockout/Tagout (LOTO) is one of the most documentation-intensive OSHA standards. It requires machine-specific written procedures for every piece of equipment that could release hazardous energy during servicing. The standard also mandates distinct training for authorized employees (who perform LOTO) and affected employees (who work near locked-out equipment):
- Written energy control program covering lockout/tagout procedures
- Machine-specific energy control procedures for each piece of equipment
- Training for authorized, affected, and other employees
- Periodic inspections of energy control procedures at least annually
- Lockout/tagout devices must be durable, standardized, and individually assigned
- Group lockout procedures when multiple workers service the same equipment
Most Common Violations
LOTO violations are almost entirely documentation-based — the most common citation is simply not having written energy control procedures. Generic procedures that are not specific to individual machines are also frequently cited. The annual periodic inspection requirement is the second most missed element:
- No written energy control program
- Missing machine-specific lockout/tagout procedures
- Inadequate or missing employee training documentation
- No periodic inspections of energy control procedures
- Using tagout alone when lockout is feasible
- Lockout devices not individually assigned to authorized employees
Penalty Exposure
Penalty range: $1,190–$16,550 per serious violation; up to $165,514 per willful violation
LOTO violations carry severe penalties because failure to control hazardous energy causes approximately 120 fatalities per year. A single serious LOTO citation can cost up to $16,550 in 2026. Because the standard requires machine-specific procedures, OSHA can cite a separate violation for each piece of equipment lacking documented procedures — creating substantial cumulative penalties.
The annual periodic inspection is a unique requirement that many contractors miss. Its absence alone generates a citation regardless of how well the day-to-day LOTO program operates.
Documentation You Need
LOTO documentation is extensive but structured. The key requirement is that procedures must be specific to each machine — not generic templates applied broadly:
- Written energy control program
- Machine-specific lockout/tagout procedures for each piece of equipment
- Training records for authorized, affected, and other employees
- Annual periodic inspection records with inspector name and date
- Lockout device assignment records
- Group lockout coordination documentation when applicable
What Inspectors Look For
During an OSHA inspection, LOTO compliance is evaluated primarily through document review. Inspectors will request written procedures and training records, then verify that workers can describe the procedures for their specific equipment:
- Written energy control program — first document requested
- Machine-specific procedures — generic "turn off power" is not sufficient
- Training records distinguishing authorized vs. affected employees
- Annual periodic inspection records
- Physical lockout devices at the point of use
- Employee knowledge of their specific lockout responsibilities
Build Your LOTO Documentation Before an Inspector Asks for It
The OSHA Defense Documentation System includes training record templates and inspection log formats covering the documentation framework for lockout/tagout compliance under 29 CFR 1910.147.
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