Lake
New member
- Location
- New Jersey, USA
Is there a section in the code that governs when to use a Main Breaker vs MLO? I working on a PV system with a total of 41 string inverters and the output of the inverters being divided between three 600A, MLO, 480Y/277 panel boards. The panel boards are then fed to a 2,000A, MLO Switchboard. I am trying to determine if the 600A panel boards will require a Main or not based on the code.