Standard Interpretations
OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed. Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.
- 1910.304 - Compliance requirements for relocatable power taps or "power strips" - 11/18/2002
- 1910.304 - Double Insulated vs. Electrically Grounded Sewing Machines for Schooling Use. - 02/19/1986
- 1910.304 - Electrical Conductor Identification. - 12/18/1997
- 1910.304 - Electrical equipment grounding requirements on concrete floors. - 11/26/2003
- 1910.304 - Electrical Grounding of Overhead Cranes and Hoists. - 12/05/2011
- 1910.304 - Electrical Standards. - 06/22/1981
- 1910.304 - Extension cord equipped with a built-in "continuity tester". - 04/08/1993
- 1910.304 - Grounding requirements with respect to a battery charger used with rechargeable power tools. - 03/12/1996
- 1910.304 - Testing equipment for use in potentially hazardous environments. - 10/29/1986
- 1910.304(a)(1) - Covering for Grounded Contact Conductors on Overhead Traveling Crane Systems (Patrick E. Wall/DEP/GIE/Harvey/26611) - 06/29/2015
- 1910.304(a)(2) - Acceptable job-made extension cords. - 06/17/1992
- 1910.304(a)(3) - Grounding requirements for equipment connected by cord and plug. - 12/21/1999
- 1910.304(b)(2) - Compliance requirements for relocatable power taps or "power strips" - 11/18/2002
- 1910.304(f) - Interpretation of standards applicable to battery storage installations. - 08/09/1983