Lockout/Tagout requirements (29 CFR 1910.147): a compliance breakdown
Key takeaways
- Energy-control procedures must be machine-specific; one generic procedure for an entire facility rarely satisfies 1910.147(c)(4).
- Three employee roles matter — authorized, affected, and other — and each has a distinct training obligation.
- A periodic inspection of the procedures is required at least annually and must be documented.
- Tagout-only programs must provide protection equivalent to lockout, which is a high bar OSHA scrutinizes closely.
When does Lockout/Tagout (1910.147) apply?
The standard covers the servicing and maintenance of machines and equipment where the unexpected energization, startup, or release of stored energy could harm employees. "Energy" is broad — electrical, mechanical, hydraulic, pneumatic, chemical, thermal, and the potential energy stored in springs, raised loads, or pressurized lines.
It does not apply to minor tool changes and adjustments that occur during normal production operations, provided they are routine, repetitive, and integral to production and the work is done using alternative effective protection. That production exception is narrow and frequently misapplied.
What are the six required elements of a LOTO program?
A compliant program under 1910.147 includes: documented energy-control procedures; an employee training and communication program; periodic inspection of the procedures; protective materials and hardware (locks, tags, blocks); enforcement of the procedures by the employer; and provisions for specific situations such as group lockout, shift changes, and outside contractors.
The documented procedures themselves must identify the scope and purpose, the specific steps for shutting down and isolating equipment, the steps for applying and removing energy-control devices, and the requirements for testing to verify isolation.
Who has to be trained, and on what?
1910.147(c)(7) defines three groups. Authorized employees — those who lock or tag out equipment to perform service — receive the most extensive training on recognizing hazardous energy, the type and magnitude of energy in the workplace, and the methods to isolate and control it.
Affected employees operate or work near the equipment being serviced and must understand the purpose and use of the procedures. All other employees who may be in an area where procedures are used must be instructed on the prohibition against restarting locked-out equipment. Retraining is required when job assignments, machines, or procedures change.
Why is 1910.147 always near the top of OSHA’s citation list?
Lockout/Tagout consistently ranks among OSHA’s most-cited general industry standards, with thousands of citations every fiscal year. The failures cluster predictably: no documented machine-specific procedures, missing or undocumented annual inspections, and incomplete training records.
Because these are documentation and program failures rather than one-off equipment issues, they are visible the moment an inspector asks for the written procedures — which makes 1910.147 one of the easiest standards for OSHA to cite and one of the most preventable for employers to close.
Referenced standards
Frequently asked questions
How often must Lockout/Tagout procedures be inspected? +
At least annually. 29 CFR 1910.147(c)(6) requires a periodic inspection of each energy-control procedure, conducted by an authorized employee who is not using the procedure being inspected, and the inspection must be documented.
Is a tagout-only program allowed under 1910.147? +
Yes, but only when the employer demonstrates that tagout provides protection equivalent to lockout, or when the equipment cannot be locked out. OSHA holds tagout-only programs to a "full employee protection" standard that is difficult to meet, so lockout is strongly preferred.
Does Lockout/Tagout apply to minor tool changes during production? +
Not necessarily. Minor servicing during normal production operations is exempt if it is routine, repetitive, and integral to production and is performed using alternative measures that provide effective protection. This exception is narrow and does not cover most maintenance work.
Marcus is a Certified Safety Professional with 14 years building compliance programs for general industry and construction employers. He reviews Cairn’s regulatory guidance against the current Code of Federal Regulations and OSHA enforcement record.