3.5 Ton Fan Coil Unit above a 4160V Transformer

[tybkeith]

Is it acceptable to mount a Fan Coil Unit above a 4160 dry-type transformer in a small electric room? A drip pan will be provided under the Fan Coil Unit.

 

[Knightryder12]

I am sure this is not code compliant, but even if it was, it would not be a good idea to put a possible water source over a 4160 transformer.

 

[tybkeith]

I am sure this is not code compliant, but even if it was, it would not be a good idea to put a possible water source over a 4160 transformer.

Thank you for the reply. It doesn't look right to me either. The potential of water dripping onto the 5kV transformer, a maintenance tech possibly standing on the transformer to change the FCU filter, violation of dedicated space above the transformer, etc. But, NFPA 70 only addresses dedicated space above switchgear, motor control centers, etc. it does not say anything about dedicated space above a transformer.

 

[augie47]

What is the enclosure rating on the transformer ?? Our POCO has several 4160 dry transformers located outdoors & subject to abuse with no serious problems

 

[tybkeith]

What is the enclosure rating on the transformer ?? Our POCO has several 4160 dry transformers located outdoors & subject to abuse with no serious problems

The product data does not list the enclosure rating. Here is what I see... 3PH, 5kV, General Purpose Dry Type, Indoor, Case F

 

[petersonra]

I am sure this is not code compliant, but even if it was, it would not be a good idea to put a possible water source over a 4160 transformer.

A lot of 4160 transformers are located outside in the weather.

I don't know if it is code compliant or not. There is a requirement for working space but it only applies to equipment likely to be required to be worked on while energized, and the general consensus seems to be that this does not apply to transformers. I am unconvinced but that seems to be the general feeling.