UFC 3 -520-01
June 10, 2002
Temporary electrical power and lighting installations 600 volts, nominal, or
less can be used only for the following applications:
During and for remodeling, maintenance, repair, or demolition of buildings,
structures, or equipment, and similar activities.
For experimental or development work.
For a period not to exceed 90 days for Christmas decorative lighting, carnivals, and
Temporary wiring over 600 volts, nominal, can be used only during periods of
tests, experiments, or emergencies.
Originate feeders for temporary wiring in an approved distribution center. The
conductors should be run as multiconductor cord or cable assemblies, or, where not
subject to physical damage, the y can be run as open conductors on insulators not more
than 3 meters (10 feet) apart.
Originate branch circuits for temporary wiring in an approved power outlet or
panelboard. Conductors should be multiconductor cord or cable assemblies or open
conductors. If run as open conductors, fasten them at ceiling height every 3 meters (10
feet). No branch-circuit conductor can be laid on the floor. Each branch circuit that
supplies receptacles or fixed equipment must contain a separate equipment grounding
conductor if run as open conductors.
Receptacles must be of the grounding type. Unless installed in a complete
metallic raceway, each branch circuit must contain a separate equipment grounding
conductor and all receptacles must be electrically co nnected to the grounding
conductor. Provide GFCI protection in accordance with NEC Article 527.6 (2002
No bare conductors nor earth returns can be used for the wiring of any
Suitable disconnecting switches or plug connectors should be installed to
permit the disconnection of all ungrounded conductors of each temporary circuit.
Protect lamps for general illumination from accidental contact or breakage.
Protection should be provided by elevation of at least 2.1 meters (7 feet) from the
normal working surface or by a suitable fixture or lampholder with a guard.
Protect flexible cords and cables from accidental damage. Avoid sharp
provide flexible cords and cables with protection to avoid damage.