j2020
Member
- Location
- California
- Occupation
- Engineer
Can someone please educate me on a question that I have. There is an existing Distribution Panel that is rated at 400A, 480V, 3 phase, 3 wire with 400A main breaker. I wanted to re-route an existing feeder from another existing Distribution Panel located in the same room to connect to the 400A, 480V, 3 phase, 3 wire Distribution Panel. My question is that the existing Distribution Panel that I want to re-route the feeder to the 400A distribution panel has a 600A adjustable trip main breaker. I checked and the main breaker can be set at 400A. My question is if the main breaker is rated at 600A and I can adjust the trip at 400A, is it allowable to connect to the 400A, 480V, 3 phase, 3 wire Distribution Panel since the Distribution Panel that I want to connect to has a 400A main breaker?