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.
- 1926.401 - Plugging into an unprotected outlet with a portable GFCI would be in violation of the standard. - 02/10/1977
- 1926.401 - Portable electric lighting used in moist and/or other similar hazardous locations. - 08/24/1981
- 1926.401 - Temporary wiring and temporary lighting in heavy construction. - 12/20/1979