OSHA Lockout Tagout Letters of Interpretation

Source: United States Department of Labor

#    Standard Interpretations
3    2012 – 12/12/2012 – Whether an LED type device ca be used for the isolation and deenergization verification requirements of 1910.147 and 1910.333.
4    2012 – 08/02/2012 – Clarification on the use of a tagout device when an energy isolating device is capable of being locked out.
6    2012 – 04/03/2012 – Application of Lockout/Tagout to Employees Performing Maintenance Tasks on Cord and Plug Equipment.
7    2011 – 08/30/2011 – Use of local valves as a means of equipment isolation for energy control.
8    2011 – 08/04/2011 – Numerous questions on lockout/tagout under 1910.147 and 1910.269
9    2010 – 11/30/2010 – Numerous questions on lockout/tagout under 1910.147 and Subpart S.
10  2008 – 01/25/2008 – Use of a PLC system as an alternative measure which provides effective protection for minor servicing activities.
11  2007 – 05/04/2007 – Lockout/Tagout and the provisions for testing or positioning of machines while they are energized.
12  2007 – 04/23/2007 – Application of Control of Hazardous Energy (LOTO) requirements to compressed gas cylinders.
13  2007 – 04/18/2007 – PRCS and LOTO requirements for accumulation of stored energy in steam pits
14  2007 – 02/26/2007 – Evaluation of the ElectroGuard disconnect system for use as an energy isolating device.
15  2006 – 12/28/2006 – Application of the Lockout/Tagout standard to die-setting activities and other machine setup operations.
16  2006 – 10/11/2006 – Use of LOTO device on equipment placed in “out of service” status not related to servicing or maintenance.
17  2006 – 08/25/2006 – Several questions regarding OSHA’s LOTO and Bakery standards 29 CFR 1910.147 and 1910.263.
18  2006 – 07/28/2006 – Clarification about 29 CFR 1910.333 and 29 CFR 1910.147 as they relate to work inside an electrical panel and on related equipment.
20  2006 – 05/09/2006 – Use of additional lock on a conveyor and baler system exceeds one lockout device.
21  2006 – 01/18/2006 – Interlock requirements for access door(s) of trash compactor.
22  2005 – 10/24/2005 – Training programs for the Control of Hazardous Energy (LOTO) and for the Hazard Communication standard are not satisfied solely by merely providing employees written documentation.
23  2005 – 08/24/2005 – Lockout/tagout requirements for servicing manually-controlled vertical/horizontal milling machine and drill press tool changes.
25  2005 – 04/22/2005 – Lock out/Tag out (LOTO) requirements for die-setting operations in hydraulic power presses.
26  2004 – 11/10/2004 – Recognition of ANSI/ASSE Z244.1-2003 “Control of Hazardous Energy — Lockout/Tagout and Alternative Methods” consensus standard.
27  2004 – 04/07/2004 – Printing Industry: Lock Out/Tag Out and the essential elements of the inch-safe-service technique.
30  2003 – 05/13/2003 – Acceptability of modifying a standard on/off switch to provide lockout capability to a machine.
32  2002 – 08/30/2002 – Color is not the only prescribed factor for the standardization of LOTO devices.
33  2002 – 07/08/2002 – Use of verification tags for lockout.
34  2000 – 11/16/2000 – Applicability of OSHA’s LOTO standards; isolation and verification procedures.
35  2000 – 07/10/2000 – Evaluation of proposed modifications to the Bureau of Prisons’ Lockout/Tagout (LOTO) procedures.
36  1999 – 11/10/1999 – LOTO of hydraulic systems; postal workers’ exposure to hazardous material spills.
37  1999 – 02/26/1999 – OSHA enforcement policy on vertical food mixers.
38  1998 – 08/19/1998 – Workers must be protected from hazards of heated (hot) surfaces.
39  1997 – 02/27/1997 – Clarification on entitlement of a copy of energy control program documentation at meat packing plant.
40  1996 – 10/29/1996 – Consultants performing lockout/tagout periodic inspections.
41  1996 – 10/02/1996 – Food Inspectors lockout/tagout procedures.
42  1996 – 09/11/1996 – Voluntary safety and health audits under the Occupational Safety and Health Act.
43  1996 – 05/15/1996 – Electrical generators in hospitals and the control of hazardous energy.
44  1995 – 10/27/1995 – Guidance in determining whether elevator pits meet the definition of confined spaces.
45  1995 – 09/27/1995 – Interpretation of the Process Safety Management of Highly Hazardous Chemicals Standard.
46  1995 – 08/28/1995 – The Lockout/Tagout Standard.
48  1994 – 02/09/1994 – OSHA’s lockout/tagout standard is not applicable to maritime employment.
50  1993 – 06/14/1993 – Applicability of the Machine Guarding and Lockout/Tagout standards to printing presses.
51  1992 – 09/16/1992 – Printing Presses: requirements for normal production and servicing operations.
52  1991 – 08/05/1991 – Motor starter circuits and energy isolation devices
53  1991 – 06/04/1991 – Interpretation of 1910.147, related to floating fish processors.
54  1991 – 04/10/1991 – Work permits in lockout/tagout standard requirements