NEMA ST 20:2021
Current
The latest, up-to-date edition.
Dry Type Transformers for General Applications
Hardcopy , PDF
English
06-12-2022
This technical publication applies to single-phase and polyphase dry-type transformers (including autotransformers and non-current-limiting reactors) for supplying energy to power, heating, and lighting circuits and designed to be installed and used in accordance with the National Electrical Code®.1
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