What Does OSHA Require for Lockout/Tagout (LOTO) Procedures?
OSHA requires employers to establish a written Lockout/Tagout (LOTO) program under 29 CFR 1910.147 that controls hazardous energy whenever workers service or maintain equipment. Failure to follow LOTO is one of the top-cited OSHA violations every year — and one of the most preventable causes of workplace fatalities.
What Is Lockout/Tagout?
Lockout/Tagout refers to specific safety procedures used to ensure that dangerous machines are properly shut off and cannot be restarted before maintenance or servicing work is complete. "Lockout" uses a physical lock to isolate energy sources. "Tagout" uses a warning tag when a lock cannot be applied.
Hazardous energy includes electrical, mechanical, hydraulic, pneumatic, chemical, and thermal energy. Any of these can cause serious injury — or death — if released unexpectedly while a worker is inside or near equipment.
Who Does OSHA's LOTO Standard Apply To?
The general industry LOTO standard (29 CFR 1910.147) applies to all employers where workers service or maintain equipment that could release hazardous energy. This includes:
- Manufacturing facilities
- Food processing plants
- Warehouses and distribution centers
- Printing and packaging operations
- Utilities and maintenance contractors
Construction has a separate OSHA standard (29 CFR 1926 Subpart K) covering electrical hazards, but the core LOTO principles still apply to multi-employer worksites.
What Are the Core OSHA LOTO Requirements?
Here's what your program must include under 29 CFR 1910.147:
- Written Energy Control Program — A documented policy covering all energy types and how they will be controlled.
- Machine-Specific Procedures — Step-by-step written procedures for each piece of equipment where LOTO applies. These can't be generic — they must list the specific energy sources, isolation points, and sequence of steps.
- Employee Training — Authorized employees (those who perform lockout), affected employees (those who operate equipment), and other employees (those who work in areas where LOTO is used) all require different levels of training.
- Energy Isolating Devices — Locks, hasps, lockout stations, and tags must be provided by the employer at no cost.
- Annual Inspections — OSHA requires a periodic review (at least annually) of each energy control procedure, certified in writing.
- Contractor Coordination — When outside contractors perform servicing, you must inform them of your LOTO program and coordinate procedures with theirs.
A Real-World Scenario
A maintenance tech at a metal stamping plant is asked to clear a jam in a press. Without a machine-specific LOTO procedure, he shuts the machine off at the control panel but doesn't isolate the energy at the breaker. A coworker, unaware the tech is inside the machine, restarts it from the panel. Result: a crushing injury — and an OSHA citation with a $15,625 penalty.
With a proper LOTO program, the tech would have: identified the specific isolation point (main electrical disconnect), applied his personal lock, verified zero energy state by pressing the start button, and posted a tag. No one else can restart the equipment while his lock is on it.
For contractors and operations managers preparing for an audit or prequalification, LOTO is almost always on the checklist. EHS Inc specializes in building compliant LOTO programs for small manufacturers and contractors — including the machine-specific procedures that most companies are missing.
Common LOTO Mistakes That Trigger OSHA Citations
- Using only a tagout when lockout is feasible
- Sharing a group lock instead of each worker using their own personal lock
- No machine-specific written procedures (generic ones don't count)
- Skipping the annual review and certification
- Not training new employees before they start work
Frequently Asked Questions
Is a tagout alone ever acceptable under OSHA LOTO rules?
Tagout alone is only permitted when the equipment cannot be locked out — for example, if there is no hasp or locking mechanism on the energy isolating device. Even then, OSHA requires additional measures to provide equivalent protection, such as removing a valve handle or blocking a circuit breaker. Whenever lockout is feasible, it must be used instead of tagout.
How often does OSHA require LOTO procedures to be reviewed?
OSHA requires at least an annual inspection of each energy control procedure. The inspection must be performed by an authorized employee other than the one using the procedure, and it must be certified in writing with the machine, date, and employees involved.
What is the difference between an authorized employee and an affected employee in LOTO?
An authorized employee is trained to apply lockout/tagout devices and perform servicing. An affected employee operates or uses equipment that is being locked out. Affected employees need to understand that they cannot restart equipment with a lockout device applied — they don't need to know how to perform the full procedure themselves.
Does LOTO apply to cord-and-plug equipment?
Cord-and-plug equipment is exempt from the full LOTO standard if the plug is under the exclusive control of the employee doing the work. That means the employee must keep the plug physically in their possession during servicing. If the plug could be reached by someone else, full LOTO procedures apply.
How do I create machine-specific LOTO procedures?
Walk down each piece of equipment and document every energy source (electrical circuits, pneumatic lines, hydraulic accumulators, gravity loads, etc.), the specific isolation point for each, the sequence of steps, and how to verify zero energy state. Each procedure should be reviewed by someone familiar with the equipment. Many companies use a standardized template with photos. If this feels overwhelming, EHS Inc can build your machine-specific LOTO procedures for you as part of a full compliance package.
Bottom Line
OSHA's LOTO standard is non-negotiable for any facility where workers interact with equipment. A compliant program requires a written policy, machine-specific procedures, proper training at all levels, and an annual review cycle. If your program is missing any of these pieces, you're exposed — both to OSHA penalties and to serious worker injuries.
Need help building or auditing your LOTO program? EHS Inc provides done-for-you compliance services including LOTO procedure development, training, and annual review support for manufacturers and contractors across the country.