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.
- 1926.449 - Acceptable uses of flexible temporary cords/cables on construction sites. - 01/16/2003
- 1926.449 - Approval of temporary power for a construction site. - 01/08/1992
- 1926.449 - Hoists for suspension scaffolds must be tested by a qualified testing laboratory. - 01/16/2001
- 1926.449 - Laboratory testing requirements for hand-held electrical construction tools. - 12/12/1986
- 1926.449 - Portable and vehicle mounted generators must be "approved" on the job site. - 06/28/1993
- 1926.449 - Repair requirements for the cord plug (attachment plug) of double-insulated tools. - 05/19/2003
- 1926.449 - Temporary lighting branch circuits. - 09/24/1987
- 1926.449 - Tunnel boring machine equipment. - 12/09/1993
- 1926.449 - Use of approved GFCI's that do not have open-neutral protection. - 07/07/2003
- 1926.449 - Whether an employer can repair an extension cord under 29 CFR 1926, Subpart K. - 04/12/2010