Electrical Construction & Maintenance (EC&M) Magazine

Code Q&A

Jan. 25, 2006 Mike Holt | Electrical Construction and Maintenance

What is the largest size transformer permitted to be mounted above a suspended ceiling used for environmental air?

Q. What is the largest size transformer permitted to be mounted above a suspended ceiling used for environmental air?

A. Dry-type transformers, rated not more than 50 kVA, are permitted above suspended ceilings or in hollow spaces of buildings, if not permanently closed in by the structure [450.13(B)].

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