A cleaning crew member reaches into an industrial mixer to clean the interior. Someone turns the machine on from a panel 30 feet away. This is the accident scenario that 29 CFR 1910.147, the Control of Hazardous Energy standard, was written to prevent. The standard requires employers to establish energy control procedures (lockout/tagout procedures) for any machine or equipment that must be cleaned, maintained, or serviced, where the unexpected startup of that equipment could expose employees to injury from stored energy, whether electrical, pneumatic, hydraulic, chemical, thermal, or gravitational.
For cleaning contractors, 1910.147 applies any time the cleaning scope includes cleaning or servicing machine interiors, hoods, conveyor systems, or any equipment where the cleaning worker must place any part of their body in a location where moving parts or released energy could cause injury. The 2026 penalty ceiling is $16,550 per Serious violation and $165,514 per Willful or Repeat. LOTO fatality investigations consistently result in Willful citations when energy control procedures were absent or not followed.
What the Standard Requires
The standard requires the employer to develop, document, and use energy control procedures for each piece of equipment that requires servicing or maintenance where unexpected energization or startup could expose workers to injury. The procedures must be specific enough that an employee with appropriate training can apply them without relying on memory or verbal instruction.
| Requirement | Specific Obligation | CFR Section |
|---|---|---|
| Written energy control procedures | Documented procedure for each equipment type; includes steps to isolate all energy sources | 1910.147(c)(4) |
| Employee training | Authorized employees (those who apply LOTO) and affected employees (those in the area) require separate training | 1910.147(c)(7) |
| Periodic inspection | Annual inspection of each energy control procedure; certified in writing; corrective action if deficiencies found | 1910.147(c)(6) |
| Lockout/tagout hardware | Each authorized employee must have their own lock; tags must meet durability and standardization requirements | 1910.147(c)(5) |
| Sequence of lockout | Notify affected employees; identify energy sources; isolate; apply lockout/tagout devices; release stored energy; verify isolation before proceeding | 1910.147(d) |
| Contractor coordination | When outside contractor performs LOTO-covered tasks, host employer must inform contractor of LOTO procedures; contractor must comply | 1910.147(f)(2) |
The contractor coordination requirement at 1910.147(f)(2) is the provision most directly applicable to BSCs. When a cleaning contractor services equipment at a client facility, the client must inform the BSC of the facility's energy control procedures, and the BSC must ensure its employees comply with those procedures and do not attempt to restart any locked-out equipment. The BSC must also inform the client of its own energy control procedures. Failure to exchange this information is a citable violation for both parties.
Who It Applies To
The standard applies to general industry employers for any service or maintenance activities where unexpected energization could occur. Minor tool changes and adjustments that are routine, repetitive, and integral to the production process, performed on minor tool changes with an alternative protection measure in place, may fall under the minor servicing exception at 1910.147(a)(2)(ii). For cleaning operations, this exception is narrow: cleaning the interior of a conveyor, cleaning inside an industrial oven or mixer, or clearing jams from any powered equipment requires full LOTO compliance. Wiping down the exterior of a machine that is running does not.
What the Inspector Looks At
OSHA LOTO inspections triggered by injury or complaint focus immediately on whether a written energy control procedure exists for the equipment involved, whether the employee performing the task was an authorized employee under the procedure, and whether the lockout hardware was applied before work began.
| Inspector Check | Common Deficiency | Citation Risk |
|---|---|---|
| Written energy control procedures | No written procedures; procedures exist but are generic rather than equipment-specific | Serious, $16,550 |
| Authorized employee training | Employee performing LOTO-covered cleaning task not trained as authorized employee | Serious, $16,550 |
| Annual inspection records | Periodic inspection of procedures not conducted or not certified in writing | Serious |
| Individual locks | Group lockout used without individual employee locks; single lock applied by supervisor rather than each worker | Serious |
| Contractor coordination | No documented exchange of LOTO information between host employer and cleaning contractor | Serious |
| Tagout-only programs | Tagout used where lockout is feasible; no documentation that machine cannot be locked out | Serious to Willful |
Common Citations and What They Cost
1910.147(c)(4)(i), failure to develop documented energy control procedures, is the most commonly cited LOTO violation nationally. For cleaning contractors, 1910.147(c)(7)(i), failure to train authorized employees, is the second most common. Both are Serious at up to $16,550 each. LOTO citations are among the most likely to carry Willful classification when a serious injury or fatality triggers the inspection, because the absence of LOTO procedures after a machine-related injury indicates the employer knew the hazard existed and took no action. Willful LOTO citations at the $165,514 ceiling have been issued to general contractors and cleaning contractors in manufacturing environments after injury events.
Tradeoffs and Operator Reality
The practical problem for BSCs in industrial accounts is that the LOTO scope negotiation with the client happens at contract award, not at the time of the incident. A cleaning scope that includes "wipe down all processing equipment" may or may not include machine interiors, and the distinction matters enormously for LOTO compliance. BSCs who accept broad cleaning scopes without clarifying the LOTO boundary in writing are accepting LOTO liability without the training, hardware, or procedures to manage it. The resolution is a written scope that explicitly lists which cleaning tasks are LOTO-covered and which are not, and requires the client to either train and equip the BSC's crew as authorized employees or restrict the cleaning scope to exterior surfaces only. The tradeoff: clients sometimes interpret this scope clarification as resistance, particularly in facilities where "clean the equipment" has meant whatever is needed. Framing it as "here is what our LOTO compliance program covers" rather than "here is what we won't do" usually resolves the negotiation.
What to Put in the SOW and Training Matrix
The SOW for any industrial account with LOTO-covered cleaning tasks should explicitly list the equipment and tasks covered by the energy control program, the client's responsibility to provide the BSC with facility-specific energy control procedures, the BSC's responsibility to train authorized employees on those procedures, and the lockout hardware requirements. The training matrix should distinguish between authorized employee training (required for workers who apply and remove locks) and affected employee training (required for workers who are in the area during LOTO-covered tasks performed by others).
Use the scope-of-work generator to include LOTO boundary language in industrial account SOWs. For the walking-working surface hazards that exist in the same industrial environments as LOTO-covered equipment, see OSHA Walking-Working Surfaces 1910.22. For PIT interface hazards in industrial facilities, see OSHA PIT 1910.178. Full compliance reference at Opora Compliance Library.
The OSHA hazardous energy control topic page includes the standard text, a compliance directive, and enforcement guidance. The eCFR text of 1910.147 is the authoritative source. The CDC NIOSH lockout/tagout page includes injury data from hazardous energy release incidents and guidance on energy control procedure development. The OSHA 1910.147 Appendix A provides a model energy control procedure that satisfies 1910.147(c)(4) requirements for standard equipment configurations. For industrial cleaning programs where LOTO requirements are most prevalent, see the industrial cleaning vertical hub.
By the Opora Editorial Team · Last updated: 2026