Explanation: As noted in Sec. 450.13(B) of the 2020 NEC, transformers placed in hollow spaces must be no larger than 50kVA. Lupacchino is a senior design engineer with Gaylor Electric, Inc. in ...
Article 450, Part III provides the requirements for transformer vaults. The first requirement is that they be located where they can be ventilated to the outside without using flues or ducts, wherever ...
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