jaggedben
Senior Member
- Location
- Northern California
- Occupation
- Solar and Energy Storage Installer
Since the feeder has a 100 amp breaker at each end - it will never carry more then a 100 amp device allows.
The feeder is supplying a separate building - there needs to be a main disconnect on the load side of the feeder in the separate building, main breaker in the panel is probably simplest way to do so in most cases.
The feeder conductor is only a 90 amp conductor, one could have a 100 at the supply end and that makes the conductor a feeder tap - but if outside there is no limit to length, but a 90 amp breaker would be needed on the load end. Or a 90 amp is acceptable on the supply end and it really wouldn't matter what setting is on the load end when it comes to protecting the feeder conductor.
Good points, although if the AHJ decides to enforce the 120% rule on this conductor then it's mostly moot. Not much support in the 2008 code for considering an inverter output circuit to also be a tap.