Lockout/Tagout (LOTO) Safety for Manufacturing (29 CFR 1910.147) (2025)
29 CFR 1910.147 — the Lockout/Tagout (LOTO) standard — requires every general-industry manufacturer that services or maintains equipment with hazardous energy to run a written energy-control program: written procedures specific to the machine, individual locks and tags on every energy-isolating device, zero-energy verification by try-out, training for authorized and affected employees, an annual periodic inspection, and a group-LOTO procedure for multi-worker jobs. Any plant that runs stamping presses, mixers, conveyors, robotic cells, or batch reactors must comply — and the citation exposure runs up to $161,323 per violation.
Why It Matters
Unexpected energization during service is one of the most preventable causes of manufacturing fatality
OSHA's enforcement data consistently places §1910.147 near the top of general- industry citation counts year after year. The pattern is well known and almost entirely preventable: an authorized employee performs service on a covered machine, the energy- control procedure is incomplete or skipped, the machine is re-energized before work finishes, and the employee is caught at the point of operation. The fatalities cluster in facilities where the written procedure is generic rather than machine-specific, where locks are shared rather than individually applied, where stored energy (hydraulic, pneumatic, gravitational, thermal, chemical, residual electrical) is not released or restrained, and where the annual periodic inspection is signed without any actual observation.
29 CFR 1910.147 was written to consolidate that risk into a single program: general duty and applicability in §1910.147(a)–(b), written energy-control procedures in §1910.147(c), training for authorized and affected employees in §1910.147(d), annual periodic inspection in §1910.147(e), durable and standardized lockout/tagout devices in §1910.147(f), and group lockout/tagout coordination in §1910.147(g). A well-run LOTO program covers every form of hazardous energy — electrical, mechanical, hydraulic, pneumatic, chemical, thermal — and ties directly to the OSHA 300, 300A, and 301 entries when an energy incident occurs.
~50/yr
workers killed and thousands more seriously injured by unexpected energization during service or maintenance (BLS / OSHA enforcement data)
3%–5%
energy-control programs that OSHA cites as deficient in any given audit cycle (OSHA Federal-State enforcement data)
29 CFR 1910.147 — Sections That Carry the Citations
Six paragraphs of §1910.147 that cover the full LOTO program
The §1910.147 standard reads like a tightly stacked rulebook — every paragraph is a citation trigger, and a deficient LOTO program can stack citations across multiple paragraphs in one maintenance event. These six paragraphs cover the program from applicability to group coordination.
2025 OSHA §1910.147 citation penalties
OSHA adjusts its civil penalty amounts annually for inflation under the Federal Civil Penalties Inflation Adjustment Act. As of January 2025:
| Violation Type | Maximum Penalty Per Citation | Typical Trigger |
|---|---|---|
| Willful or Repeat | $161,323 | Manufacturer knowingly performed energized service or maintenance on covered equipment without LOTO, knowingly used a non-durable or non-standard LOTO device, or knowingly continued with an uncertified energy-control procedure; same §1910.147 violation cited within 5 years |
| Serious | $16,132 | Substantial probability of death or serious physical harm from an unguarded point-of-operation re-energization on a covered machine, an absent or incomplete written energy-control procedure, or an untrained authorized employee performing the lockout |
| Other-than-Serious | $16,132 | §1910.147 violation with direct relationship to safety but low probability of serious harm — missing training certification signature, periodic inspection certification stale or incomplete, group LOTO log missing a participatingemployee entry |
| Failure to Abate | $16,132/day | LOTO program gap, missing energy-control procedure, or training certification not corrected by the OSHA-specified abatement deadline |
Note: A single maintenance event on a covered machine can produce multiple §1910.147 citations — a missing machine-specific procedure, an authorized employee who never received the current procedure, a periodic inspection that was never actually performed, and a non-durable or shared lockout device each represent independent compliance duties under 29 CFR 1910.147.
Source: OSHA penalty adjustment schedule. Amounts are updated annually under the Federal Civil Penalties Inflation Adjustment Act Improvements Act of 2015.
Daily LOTO Walkthrough
LOTO daily-inspection checklist — five items to confirm before maintenance begins
These five items map to the in-app Lockout/Tagout category on the Sentinel Safety Fall Protection Daily Inspection template — locks & tags applied to every isolating device, zero-energy verified by try-out, stored energy released, written procedure current and accessible at the worksite, and group LOTO coordinated when multiple authorized employees are on the same job. Run them on paper on the shop floor and inside Sentinel Safety in the office so the same checklist governs every shift.
- Locks and tags applied to every energy-isolating device before maintenance begins, with each lock individually keyed and each tag bearing the authorized employee's identity
- Zero-energy state verified by try-out on the machine controls before any employee enters the danger zone, with stored energy released, restrained, or otherwise rendered safe
- Written energy-control procedure current for the machine, accessible at the worksite, and reviewed within the last 12 months under §1910.147(e)
- Each participating authorized employee carries a personal lock; no shared locks; no locks removed by anyone other than the authorized employee who applied them
- Group LOTO coordinated by a single designated responsible employee, with a group lockout box or comparable device, and continuity of lockout protection maintained across shift or personnel changes
Common Questions
Lockout/Tagout under 29 CFR 1910.147, answered
Related OSHA Manufacturing & Construction Pages
Three pages that bind to LOTO in a maintenance program
LOTO never stands alone in a maintenance program — it pairs with the EHS software layer that runs the training records and inspection certifications, with the record-keeping program that captures a §1910.147 incident on the OSHA 300, and with the field checklist that drives every pre-shift walk. These three pages cover the adjacent programs a LOTO coordinator needs on the same job.
Stop managing LOTO procedures and §1910.147 inspections with clipboards and spreadsheets
Sentinel Safety automates machine-specific energy-control procedures, individual-lock LOTO logbooks, group lockout coordination across shift changes, annual §1910.147(e) periodic-inspection certifications, training records and re-training reminders for authorized and affected employees, OSHA 300 / 300A / 301 record-keeping, and AI-powered incident reports — so maintenance and safety managers can run the plant, not the paperwork.
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