OSHA 1910.147 — the Control of Hazardous Energy standard — requires employers to train every authorized employee, every affected employee, and every “other” employee who works in areas where lockout/tagout (LOTO) is performed, with the depth of training scaled to each role. Authorized employees get the full procedural training; affected employees get awareness-level training on what they must not touch and why; other employees get a basic notification of the program’s existence.
If that sounds like a lot of categories, it is — and it is the single most-cited safety training failure year after year. LOTO came in fourth on OSHA’s Top 10 Most Cited list for fiscal year 2025 with 2,177 violations.
Who Has to Be Trained Under OSHA 1910.147?
The standard divides your workforce into three categories, and each gets a different training scope.
Authorized employees are the people who actually perform the lockout — the maintenance technician, the electrician, the production mechanic. They isolate energy, apply the lock and tag, perform the servicing, then remove the device. Their training has to cover four specific topics under 1910.147(c)(7)(i)(A): recognition of applicable hazardous energy sources, the type and magnitude of the energy available in the workplace, the methods and means necessary for energy isolation and control, and verification of effective energy isolation. Coggno’s Lockout/Tagout/Tryout (LOTOTO) course is the option most maintenance leads pick because it adds the verification step (the “tryout”) that turns a procedure into a defensible one.
Affected employees are the operators and area workers whose machines get locked out by someone else. They don’t apply locks. They have to know enough to recognize when LOTO is in effect and not try to start the equipment. Awareness-level training is sufficient — typically 20–40 minutes — and it gets refreshed whenever procedures change. The Lockout/Tagout for Affected Employees course is built specifically for this tier and scopes correctly to OSHA’s expectation.
Other employees are everyone else who works in or passes through the area — janitorial staff, vendors, accounting staff who walk through the shop floor on their way to the breakroom. The standard requires they be “instructed” about the program. A short awareness module or even a documented orientation acknowledgment satisfies it, but only if that orientation actually mentions LOTO by name. New-hire orientation modules like the New Hire Orientation – General Industry: Lockout/Tagout course handle this layer cleanly.
What Specific Topics Does Authorized-Employee Training Have to Cover?
The four topics under 1910.147(c)(7)(i)(A) are the floor — most well-run programs go further. The training has to be both classroom-style (or e-learning) and hands-on on the actual equipment the employee will lock out. A generic LOTO course is a start; demonstrating the procedure on the specific machine the employee will service is what makes the training defensible.
Construction-side employers face a separate scope under 1926. The general industry standard at 1910.147 doesn’t apply to construction in the same way, but most construction employers train to general industry depth anyway because it covers the same hazards and reads cleaner during a multi-jurisdiction inspection. The Lockout/Tagout (LOTO) (Construction) Course covers the construction-specific framing for jobsite mechanical and electrical work.
How Often Does LOTO Training Need to Be Refreshed?
OSHA does not set a calendar-driven retraining requirement, which surprises people. The retraining triggers under 1910.147(c)(7)(iii) are event-driven: when there’s a change in job assignment, a change in machines or equipment, a change in the energy control procedure that introduces a new hazard, or when a periodic inspection reveals deviations or inadequacies. Most safety officers add an annual refresh anyway because it’s easier to defend “we trained everyone last March” than to reconstruct the chain of events that did or didn’t trigger retraining.
Periodic inspections themselves are a separate requirement under 1910.147(c)(6) — annual at minimum, performed by an authorized employee other than the one using the procedure being inspected. The inspection often surfaces the deviations that trigger retraining, so the two requirements interlock. Sloppy periodic inspection is one of the patterns OSHA inspectors look for during an opening conference, and the audit-trail documentation for those inspections needs to be available on request.
What Documentation Does OSHA Expect?
Three records are non-negotiable. First, the energy control program itself — written procedures for each piece of equipment, naming the energy sources, the isolating devices, the verification steps, and any unique features of the machine. Second, the training certification under 1910.147(c)(7)(iv): each authorized employee’s name and the date of their training. Third, the periodic inspection records under 1910.147(c)(6)(ii): date, equipment inspected, employees included, and the inspector. Coggno’s OSHA 10 General Industry course covers the broader documentation framework that surrounds these LOTO-specific records.
The mistake that gets the most employers cited isn’t missing training — it’s missing certification of training. Training happened, the people remember it, but no one wrote down the date and the names. That’s a paperwork citation that costs the same as a substantive one. Pair it with a usable LOTO program and you’ve covered both the substance and the audit trail; without it, OSHA’s audit failure penalties can climb fast on a serious or willful finding.
How Long Should Each Training Tier Take?
Realistic seat times: authorized-employee training runs 2–4 hours of e-learning plus equipment-specific hands-on time, which usually adds another 1–2 hours per major machine type. Affected-employee training runs 20–40 minutes. Other-employee awareness runs 5–15 minutes inside a broader new-hire orientation. The hands-on component is the part employers undertrain — a paper certificate from an LMS isn’t a substitute for the technician demonstrating they can actually isolate the right valve on the right machine. Run alongside manufacturing safety compliance requirements, LOTO training is usually one of three or four modules a maintenance tech completes in their first 60 days.
What’s the Difference Between Lockout, Tagout, and LOTOTO?
Lockout uses a physical device — a lock, hasp, or chain — that prevents the energy-isolating device from being operated. Tagout uses a warning tag where lockout isn’t possible. Tagout alone is permissible only if the employer can demonstrate it provides protection equivalent to lockout, which is a tall order. LOTOTO adds a third step — tryout — where the authorized employee verifies the equipment is de-energized before starting work. The 1910.147 standard does not require tryout by name, but it does require verification of effective energy control under 1910.147(d)(6), and tryout is the easiest way to document that verification.
Many employers default to LOTOTO procedures across the board because the verification step is what stops the residual-energy injuries. Capacitors, hydraulic accumulators, pneumatic systems, and gravity-loaded mechanisms all hold energy after the main switch is off — verification catches them before someone reaches in. Arc-flash awareness training often pairs with LOTO for electrical systems where stored energy is the highest-impact hazard.
Does LOTO Training Apply to Cord-and-Plug Equipment?
Often no, but read the exception carefully. 1910.147(a)(2)(iii)(A) exempts work on cord-and-plug-connected electric equipment if the hazard is controlled by unplugging, the plug is under the exclusive control of the employee performing the work, and the unplugging fully isolates the energy. If a co-worker could walk by and plug it back in, the exception fails. If the equipment also has stored or residual energy that unplugging doesn’t drain, the exception fails. In a small office or shop where cord-and-plug truly isolates everything, you don’t need a 1910.147 program for that equipment — but you still need to train your maintenance staff to recognize when the exception applies and when it doesn’t.
How Do Periodic Inspections Differ From Training?
Training teaches an employee how to perform the procedure. Periodic inspection verifies the procedure is being performed correctly in the field. The two are required by separate paragraphs of the standard and they generate separate records. The inspector must be an authorized employee other than the one using the procedure being inspected — meaning a one-person maintenance shop technically can’t comply with this paragraph, and OSHA has rejected workarounds. Multi-tech shops, contractor-of-record arrangements, or third-party inspections are the usual paths. OSHA 300 log entries can sometimes flag the deviations a periodic inspection should also be catching — if your 300 log is showing energy-isolation injuries, your inspections probably aren’t tight enough.
Get Your Team Trained — Without the Paperwork Headache
Coggno offers tiered LOTO training that matches OSHA’s three-employee-category structure, with completion records that meet the 1910.147(c)(7)(iv) certification requirement. Three places to start:
For maintenance technicians, electricians, and authorized personnel, Lockout/Tagout/Tryout (LOTOTO) covers all four 1910.147(c)(7)(i)(A) topics and the verification step.
For machine operators and area workers, Lockout/Tagout for Affected Employees hits the awareness depth OSHA expects in 20–40 minutes.
For new hires entering general-industry environments, New Hire Orientation – General Industry: Lockout/Tagout integrates the “other employee” notification into onboarding.
Book a 15-minute walkthrough and we’ll scope LOTO training to your headcount, equipment list, and inspection cycle.
Frequently Asked Questions About OSHA 1910.147 Training
Is LOTO training required annually?
OSHA does not require annual LOTO retraining by calendar — the retraining triggers under 1910.147(c)(7)(iii) are event-based (job change, equipment change, procedure change, or deviation found during periodic inspection). Most employers add an annual refresh as a best practice because it’s easier to demonstrate ongoing competence and it usually catches small procedural drift before it becomes a citation.
Authorized employees apply the locks and perform the servicing — they get the full procedural training. Affected employees operate or work near the equipment but don’t apply locks themselves — they get awareness training on what LOTO means and how to recognize it in their area. Mixing the two tiers is one of the most common citation patterns, often because an operator gets assigned to “lock it out themselves” without first being retrained as an authorized employee.
How much can an OSHA LOTO citation cost?
As of 2025, OSHA’s penalty structure assesses up to $16,550 per serious or other-than-serious violation, $16,550 per day for failure to abate, and up to $165,514 per willful or repeated violation. LOTO had 2,177 citations in fiscal year 2025, ranking 4th on the Most Cited list. Multi-citation events on a single inspection routinely stack above $50,000, especially when training certification is missing.
Do construction employers follow 1910.147?
Not strictly — construction work falls under the 29 CFR 1926 series, and the equivalent hazardous-energy expectations live in standards like 1926.417 (electrical) and the general duty clause for mechanical hazards. Most construction employers train to 1910.147 depth anyway because it sets a defensible baseline and reads better during multi-jurisdiction inspections than the patchwork of 1926 references. The OSHA 10 construction vs. general industry distinction is the cleanest framing for which path applies.
Can a contractor’s LOTO procedure replace ours when they work on our equipment?
No. 1910.147(f)(2)(i) requires the host employer and outside contractor to inform each other of their respective lockout/tagout procedures, and the host has to ensure their own employees understand and comply with the contractor’s restrictions. Most large facilities maintain a permit-to-work or LOTO-handoff process specifically for contractor jobs to keep both parties on the same procedural page.
What counts as verification of effective isolation?
1910.147(d)(6) requires the authorized employee to verify isolation before beginning service. The acceptable methods are equipment-specific: cycling the start button to confirm no motion, testing voltage with a meter on electrical circuits (and confirming the meter on a known live source first), bleeding pneumatic or hydraulic systems to atmospheric pressure, or visually confirming a blocking device is in place. Whatever method you use, document it in the equipment-specific procedure — verification is where most “thought we were locked out” injuries actually happen.
Do I need different training for each piece of equipment?
The general procedural training is the same — recognition of energy, isolation methods, verification. The equipment-specific training is where it gets granular: the actual valves, switches, and isolation points on the actual machine. OSHA expects authorized employees to be trained on the specific procedure for the specific equipment they will lock out, which is why the hands-on component of the training cannot be skipped or replaced with a generic e-learning course alone.
