jwatts
Member
- Location
- Chicago, IL
Little confusion here about reverse fed transformers, grounding/bonding, and loads. Have a job site where the single phase 480V pole light feeds were damaged during excavation. There is an old transformer on site that was recently disconnected. The transformer is a step down, 480v to 208/120v. I know it is not listed for reverse fed, but I need to get the lights up and running ASAP as it is a shopping mall. I was planning on reverse feeding it with 208v, and getting 480v. Question I have is I believe I need to utilize a corner grounded delta on the 480v side, otherwise the system is not grounded. I have seen corner grounded deltas for 3 phase motors, but my situation is a bit different. I was hoping I could utilize this setup for the single phase 480v parking lot feeds, since each pole head has 2 hots, and no neutral is utilized in the system. Any clarifications or suggestions would be greatly appreciated.