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Lockout/Tagout
National Summary

This topic covers OSHA’s Lockout/Tagout (LOTO) standard, which is designed to control hazardous energy in order to prevent injuries to employees who service machines and equipment. Forms of hazardous energy include electrical, mechanical, hydraulic, chemical, pneumatic, and thermal energy.

OSHA’s lockout/tagout regulations require the use of locks to prevent equipment from operating while it is being serviced and/or tags that warn against starting machinery. All employers who use equipment for which lockout/tagout is required must have a documented program that includes energy control procedures, employee training, and periodic inspections.

For related resources and training materials, refer to the following topics:


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Violations 2009 Violation Summary for Lockout/Tagout - General Industry  National
Violations 2011 Violation Summary for Lockout/Tagout - General Industry  National
Regulations 29 CFR § 1910.147 The control of hazardous energy (lockout/tagout)  National
Interpretations Acceptability of modifying a standard on/off switch to provide lockout capability to a machine.[1910.147; 1910.147(c)(3); 1910.147(c)(2)(iii); 1910.303(a); 1910.399; 1910.303] 05/13/2003National
Forms Annual Lockout/Tagout Inspection Review  National
Interpretations Applicability of OSHA's LOTO standards; isolation and verification procedures.[1910.147; 1910.333(b); 1910.399] 11/16/2000National
Interpretations Application of Control of Hazardous Energy (LOTO) requirements to compressed gas cylinders. [1910.147; 1910.147(b); 1910.147(c)(7); 1910.147(c)(7)(iii)(A); 1910.147(c)(7)(iii)(B); 1910.147(f)(2)(i)] 04/23/2007National
Interpretations Application of the Lockout/Tagout standard to die-setting activities and other machine setup operations. 12/28/2006National
Questions & Answers Are there any OSHA interpretations or other guidance available on the use of programmable logic controllers for use in interlocks? 06/25/2010National
Forms Authorized Employee Training Certification Form  National
Interpretations Authorized employees must have the opportunity to verify energy isolation in group lockout/tagout 01/29/2002National
Questions & Answers Can a duplicate key for the purpose of lock removal under LOTO be held in a secure area with a procedure in place for access to the key and returning the key that does not jeapordize the employee's safety? 09/21/2011National
Interpretations Clarification of system operator exclusive control provisions.[1910.269(d)(8)(ii); 1910.269(d)(8)(v); 1910.269(x)] 11/21/2000National
Interpretations Clarification on entitlement of a copy of energy control program documentation at meat packing plant. 02/27/1997National
Interpretations Color is not the only prescribed factor for the standardization of LOTO devices.[1910.147; 1910.147(c)(5)(ii)(B)] 08/30/2002National
Interpretations Consultants performing lockout/tagout periodic inspections.[1910.147] 10/29/1996National
Forms Contractor Certification  National
Guidance Documents Control of Hazardous Energy (Lockout/Tagout)  National
Checklists Control of Hazardous Energy (Lockout/Tagout) Checklist (PDF)  National
Checklists Control of Hazardous Energy (PDF)  National
Quizzes Control of Hazardous Energy (PDF)  National
Trainer's Outlines Control of Hazardous Energy (PDF) [Safety Audit Checklists]  National
Directives CPL 02-00-147 - The Control of Hazardous Energy --Enforcement Policy and Inspection Procedures 02/11/2008National
Questions & Answers Do I have to train the authorized users and affected users separately, or can I train one class comprised of both audiences? 03/30/2011National
Handouts Don't Just Turn It Off--Lock It Out (PDF)  National
Handouts Don't Just Turn It Off--Lock It Out (PDF) -- Spanish  National
Talks Don't Just Turn It Off--Lock It Out (Word)  National
Interpretations Evaluation of the ElectroGuard disconnect system for use as an energy isolating device. 02/26/2007National
Interpretations Food Inspectors lockout/tagout procedures.[1910.147] 10/02/1996National
Interpretations Group tagging requirements requarding 1910.269(d). 10/14/1999National
Questions & Answers How often do we have to inspect each piece of equipment for lockout/tagout and how often do we have to train our employees? 05/11/2010National
Questions & Answers If an operator is throwing the disconnect on a 220 volt circuit for lockout purposes, what PPE and/or safety precautions should he or she take? If usual operations do not expose employees to live wires and/or curcuits, does NFPA 70e come into effect? 07/28/2010National
Questions & Answers If equipment has a safety interlock and it's own safety disconnect built in the unit, would it still need to be included in a lockout/tagout policy? 09/12/2011National
Questions & Answers If my factory does not operate 24/7 and we are in the middle of a LOTO maintenance procedure that another crew will complete the next day, how do you pass off the keys/locks/tags/etc. so the new crew is protected? 06/03/2010National
Questions & Answers In a lockout program, is it permissible to utilize one or two locks with no name on them and let the authorized person who will be doing the work to use one of these locks if he also places a tag with his name on it on the lock? 03/27/2008National
Questions & Answers In regard to lockout/tagout what is meant by "Certification of periodic inspections" as shown in 29 CFR 1910.147(c)? 05/29/2009National
Interpretations Interlock requirements for access door(s) of trash compactor. [1910.147; 1910.147(a)(2)(ii); 1910.212] 01/18/2006National
Questions & Answers Is the written instruction for LOTO required to be posted and hung at each machine? Or does the regulation allow the written instructions to be filed away for easy access and training on how to access? 11/20/2012National
PowerPoints Jammed Machines Lockout Tagout  National
Speaker's Notes Jammed Machines Lockout Tagout - Script View  National
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