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UL 1062 Ed. 4-2025

Unit Substations - Published Date: December 18, 2025

1.1 These requirements cover unit substations of 1000 kVA single-phase and 3000 kVA 3-phase maximum having a maximum nominal primary or secondary rating of 600 V. Their construction, installation, and use are intended to be in accordance with NFPA 70®, National Electrical Code® (NEC®).  NOTE: NFPA 70®, National Electrical Code®, and NEC® are registered trademarks of the National Fire Protection Association, Quincy, MA.

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