Joethemechanic
Senior Member
- Location
- Hazleton Pa
- Occupation
- Electro-Mechanical Technician. Industrial machinery
I worry with all the DIY hackwork, there may be additional ground bonds in the building and/or equipment
250 amp total at 240V is 60 KVA I wouldn't worry too much about a 30 KVA trans on that service, not normally, but with all the hackwork, everything could be loaded on one winding.
Or maybe one winding is defective, and this place is operating on an open delta, then the trans, or bank of trans has to be derated to 57.7% capacity.
You are going to end up having to check everything, starting with the transformer windings.
250 amp total at 240V is 60 KVA I wouldn't worry too much about a 30 KVA trans on that service, not normally, but with all the hackwork, everything could be loaded on one winding.
Or maybe one winding is defective, and this place is operating on an open delta, then the trans, or bank of trans has to be derated to 57.7% capacity.
You are going to end up having to check everything, starting with the transformer windings.