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Electrical Safety (Construction)
National Summary

OSHA's electrical standards are as comprehensive as the importance of the topic would suggest. The seriousness and prevalence of electrical hazards in the workplace, exposing construction employees to such dangers as electric shock, electrocution, fires, and explosions, make attention to electrical safety a major concern in the industry. Subpart K is based on those safeguards in the National Electrical Code (NEC) which OSHA regards as applicable to construction workers.

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Questions & Answers Does "during use" mean while the extension cord is energized? Or can you simply unplug an extension cord from a power source, plug another extension cord, then plug back into the power source? 10/27/2015National
Interpretations Interpretation of the OSHA construction standards for electrical branch circuits. 11/21/1995National
Regulations 29 CFR § 1926.400 Introduction  National
Regulations 29 CFR § 1926.402 Applicability  National
Regulations 29 CFR § 1926.403 General requirements  National
Regulations 29 CFR § 1926.404 Wiring design and protection  National
Regulations 29 CFR § 1926.405 Wiring methods, components, and equipment for general use  National
Regulations 29 CFR § 1926.406 Specific purpose equipment and installations  National
Regulations 29 CFR § 1926.407 Hazardous (classified) locations  National
Regulations 29 CFR § 1926.408 Special systems  National
Regulations 29 CFR § 1926.416 General requirements  National
Regulations 29 CFR § 1926.431 Maintenance of equipment  National
Regulations 29 CFR § 1926.432 Environmental deterioration of equipment  National
Regulations 29 CFR § 1926.449 Definitions applicable to this subpart  National
Interpretations Acceptable uses of flexible temporary cords/cables on construction sites 01/16/2003National
Interpretations Application of 1926.404(b)(1) to 208-volt branch circuits; requirement for electrical subcontractor under 1926.404(b)(1) to provide ground-fault circuit interrupters on circuits used by other subcontractors.[1926.404(b); 1926.404(b)(1); 03/22/2005National
Interpretations Approval of temporary power for a construction site.[1926.403(a)] 01/08/1992National
Interpretations Approved and Acceptable equipment has been determined to be safe by a qualified electrical testing laboratory.[1926.403] 01/07/1992National
Interpretations Compliance of type SJTW flexible cords with 1926.405(a)(2)(ii)(J) and use on construction sites.[1926.405; 1926.405(a)(2)(ii)(J)] 03/29/2004National
Interpretations CSHO use of external GFCI testers to enforce 29 CFR 1926.404(b)(1)[1926.404; 1926.404(b)(1); 1926.404(b)(1)(i); 1926.404(b)(1)(ii); 1926.404(b)(1)(iii)] 07/09/2003National
Meetings Electrical Hazards in Construction (Word)  National
Quizzes Electrical Hazards in Construction (Word)  National
Regulatory Analysis Electrical Safety (Construction)  National
Interpretations Extension cord grounding continuity requirements.[1926.404(b)(1)(iii)(D)] 08/09/1993National
Interpretations Flexible corrugated plastic covers for temporary use to cover live electric parts in switch and panel boxes.[1926.405(d); 1926.305(d)] 06/17/2002National
Interpretations General Duty Clause (5(a)(1)) citations on multi-employer worksites; NFPA 70E electrical safety requirements and personal protective equipment.[1926.402(a); 1910.132; 1910.335; 1926.403; 1926.404; 1926.405; 1926.406; 1926.407; 1926.408; 07/25/2003National
Interpretations Ground Fault Circuit Interrupter Information [1926.404(b)(1)] 02/10/1992National
Interpretations Ground fault circuit interrupters on extension cords and portable tools.[ 1926.404 ] 11/04/1992National
Interpretations Ground fault protection for a construction job-site trailer. 02/16/1993National
Guidance Documents Ground Fault Protection on Construction Sites  National
Interpretations Ground-fault protection for branch circuits.[1926.404(b)(1)] 09/17/1992National
Interpretations Information on ground fault circuit Interrupters.[1926.404(b)(1)] 02/04/1992National
Interpretations Insulation issues: definition; plastic sheaths; and guarding requirements. 02/23/1999National
Interpretations Interpretation of "unattended" in 29 CFR 1926.351(d)(1) with regard to electrode holders.[1926.351; 1926.351(d)(1)] 04/30/2010National
Interpretations Maximum allowable distance between supports for temporary electrical wiring.[1926.402(a); 1926.403(b)(1); 1926.405(a)(2)] 05/13/2004National
Interpretations Minimum distance between supports for temporary electrical wiring.[1926.405] 04/05/2004National
Interpretations Portable and vehicle mounted generators must be approved on the job site.[1926.403] 06/28/1993National
Interpretations Portable electric lighting.[ 1926.405] 03/28/1995National
Interpretations Proper equipment for testing ground-fault circuit interrupters (GFCIs).[1926.404(b)(1)(ii)] 12/09/1993National
Interpretations Protection of employees from exposure to live electrical parts with plastic switch plates/receptacle cover and non-conductive screws.[1926.405(j)(1)(i); 1926.416(a)(1); 1926.404(f)(7)(i)] 09/17/2004National
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