Can anyone please help me with a technical question? I have a customer wanting to purchase a 25 KVA 1ph Encapsulated transformer. But, he needs ClassI, Div II rating. We are a manufacturers rep and sell transformers, and our factory technical "expert" cannot answer this one. To my knowledge, no manufacturer labels a dry type transfromer as ClassI, DivII.
I believe that somewhere in the code the requirements for transformers installed in such a classified area are spelled out but don't know where to look. Can anyone help my customer out? I believe that if the winding tempature is below a certain level and the transformer is encapsulated, then it can be used in this setting. Any thoughts?