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DOE-HDBK-1092-98
8.0 TEMPORARY WIRING
It is required that temporary wiring comply with all the requirements pertaining to permanent wiring
unless specific exceptions are stated, which can be found in NEC Article 305, 29 CFR 1910.305(a)(2),
and 1926.405(a)(2).
The following codes and standards will aid in designing, installing, and inspecting temporary wiring
methods and using portable electric hand tools.
1. Articles 230, 305, and 400 of the National Electrical Code (NEC)
2. 29 CFR 1910.305
3. 29 CFR 1926.405
4. Table 232-1 of the National Electrical Safety Code (ANSI/IEEE C2)
5. Chapter 17 of NFPA 70B, Electrical Equipment Maintenance
6. Part I, Chapter 3 of NFPA 70E, Standard for Electrical Safety Requirements for Employee
Workplaces.
8.1 REQUIREMENTS AND INSTALLATION CONDITIONS OF USE
Temporary electrical installations shall be allowed during periods of construction, remodeling,
maintenance, repair, or demolition of equipment or structures or for experiments and developmental
work. However, such temporary installations are not substitutes for permanent installations and shall
be removed as soon as the construction, remodeling, experiment, or other special need is completed.
See NEC Section 305-3(d).
8.1.1 CONTACT PREVENTION
Except as modified in Article 305, temporary wiring shall meet all the requirements of the NEC for
permanent wiring to prevent accidental contact by workers or equipment.
8.1.2 VERTICAL CLEARANCES
Vertical clearance of wires, conductors, and cables above ground shall meet the requirements of NEC
Section 230-24(b) and NESC Table 232-1.1
1
See Appendix D, Reference Matrix.
8-1


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