First off I am in Florida and still working off the 2008 NEC untill July.
I have a micro inverter system that will have 3 - 20 amp breakers at two different points of connection in the existing electrical system of a single family dwelling.
The house has a standard 200 amp extended service, consisting of a 200 amp meter main combo (with breaker spaces) feeding a 200 amp MLO panel (via feed through lugs in the meter main) wtih 4/0 aluminum conductors. The bus in the meter main is rated 200 amps and the bus in the MLO panel is rated 200 amps.
The first point of interconnection to the PV system is 2 - 20 amp back fed breakers in the MLO panel inside the house. The second point is a 20 amp backfed breaker on the bus bar within the meter main combo enclosure.
Is this code compliant? My fear is this does not meet the 120% rule for the 4/0 feeders because they have 260 amps in overcurrent devices supplying power to them. Am I correct in this and should be be aware of any other possible issues?
I have a micro inverter system that will have 3 - 20 amp breakers at two different points of connection in the existing electrical system of a single family dwelling.
The house has a standard 200 amp extended service, consisting of a 200 amp meter main combo (with breaker spaces) feeding a 200 amp MLO panel (via feed through lugs in the meter main) wtih 4/0 aluminum conductors. The bus in the meter main is rated 200 amps and the bus in the MLO panel is rated 200 amps.
The first point of interconnection to the PV system is 2 - 20 amp back fed breakers in the MLO panel inside the house. The second point is a 20 amp backfed breaker on the bus bar within the meter main combo enclosure.
Is this code compliant? My fear is this does not meet the 120% rule for the 4/0 feeders because they have 260 amps in overcurrent devices supplying power to them. Am I correct in this and should be be aware of any other possible issues?