UL 1062 PDF
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UL Standard for Safety Unit Substations – Fourth Edition
1 Scope
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 volts. Their construction, installation, and use are intended to be in accordance with the National Electrical Code, ANSI/NFPA 70.
1.2 Deleted
Summary of Topics
This reaffirmation of ANSI/UL 1062 dated August 13, 2025 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS). No technical changes have been made.
| Edition | 4 |
|---|---|
| Published Date | December 18, 2025 |
| Language | English |






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