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.
- 1910.335 - Applicability of the new Electrical Safety final rule, Subpart S, to the construction industry - 09/07/1990
- 1910.335(a) - Whether use of personal protective equipment is mandatory when working under heat stress conditions. - 05/18/2010
- 1910.335(a)(1)(iv) - OSHA requirements for warning signs and protection from electric-arc-flash hazards and compliance with NFPA 70E-2004. - 11/14/2006
- 1910.335(a)(1)(v) - OSHA requirements for warning signs and protection from electric-arc-flash hazards and compliance with NFPA 70E-2004. - 11/14/2006
- 1910.335(a)(2)(i) - OSHA requirements for warning signs and protection from electric-arc-flash hazards and compliance with NFPA 70E-2004. - 11/14/2006
- 1910.335(a)(2)(i) - Training and PPE for employees performing tests on equipment. - 06/22/1998
- 1910.335(a)(2)(i) - Use of insulated hand tools - 07/30/1996
- 1910.335(a)(2)(ii) - OSHA requirements for warning signs and protection from electric-arc-flash hazards and compliance with NFPA 70E-2004. - 11/14/2006
- 1910.335(a)(2)(ii) - Use of ANSI C2-1997 as guidance for protecting employees working near insulated shielded conductors - 09/26/2002
- 1910.335(b)(1) - OSHA requirements for warning signs and protection from electric-arc-flash hazards and compliance with NFPA 70E-2004. - 11/14/2006