Underwriters Laboratory (UL) has released the fourth edition of UL 1640. This standard pertains to Portable Power-Distribution Equipment and is now available on the UL webstore.
Description: “These requirements cover portable power-distribution equipment rated 600 volts or less and 1600 amperes maximum. They are intended for either single-or multi-phase supply and are intended to distribute power in accordance with the National Electrical Code, NFPA 70 (NEC).
These requirements cover portable power-distribution equipment intended for use in the following locations:
a) Carnivals, circuses, fairs, and similar locations in accordance with Article 525 of the NEC;
b) Exhibition halls in accordance with Article 518 of the NEC;
c) Motion picture and television studios and similar locations in accordance with Article 530 of the NEC;
d) Theaters, audience areas of motion-picture and television studios, and similar locations in accordance with Article 520 of the NEC; and
e) Temporary installations at construction sites in accordance with Article 590 of the NEC.”
*Description from UL Website.
