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May 5, 2021


UL 1640 Requirements for PDUs

Last week, we discussed the updated guidelines for UL 943 and the May 2021 deadline for compliance. This week, we’re discussing another important safety standard: UL 1640.

Improving GFCI Safety Through UL 943

Since its first requirement 50 years ago, the Ground Fault Circuit Interrupter (GFCI) has undergone numerous design improvements to increase personnel protection. These changes were catalyzed by input from organizations such as the Consumer Products Safety Commission (CPSC), the National Electrical Manufacturers Association (NEMA), and Underwriters Laboratories.