hhsting
Senior Member
- Location
- Glen bunie, md, us
- Occupation
- Junior plan reviewer
I have enphase IQ7-60-2-US micro inverter.
Max power each inv: 240w
Max output voltage: 240V single phase
Attached sketch shows AC 240/120V single phase subpanel MLO which connects to line side of main service disco.
Subpanel has 6 breakers which feed respective string microinverters.
So I have (12)#10 awg in one conduit going to each respective string from the subpanel. If I take 15 microinverter string then max amps drawn is 15A. To size breaker IQ7 15x1.25=18.75A which is 20A.
However when I do ampacity correction of #10 for 12 of them 50% I get exactly 15A. However breaker is sized 20A.
Is #10 sized correctly or should it be next size up#8?
Max power each inv: 240w
Max output voltage: 240V single phase
Attached sketch shows AC 240/120V single phase subpanel MLO which connects to line side of main service disco.
Subpanel has 6 breakers which feed respective string microinverters.
So I have (12)#10 awg in one conduit going to each respective string from the subpanel. If I take 15 microinverter string then max amps drawn is 15A. To size breaker IQ7 15x1.25=18.75A which is 20A.
However when I do ampacity correction of #10 for 12 of them 50% I get exactly 15A. However breaker is sized 20A.
Is #10 sized correctly or should it be next size up#8?