DavidF2
DIY
Hi,
I plan to add solar to my home and have a question about how many amps I can backfeed into my AC service panel using Net Metering. I know NEC 705.12 (D) (3) limits this to 120% of the service panel busbar capacity minus the main circuit breaker rating.
I have an old GE panel from the ‘70s, Model number TM1410MUF that has a 100A main breaker, so at first glance it looks like I can only have a 20A solar breaker. But, the label on the door says “Main Ratings 120/240V A-C 3—WIRE”, then below that it says “125A Max SEE MAIN CIR. BKR. RATING”.
Is this saying my busbar rating is 125A, and so would I be able to install a solar breaker (1.2 x 125) – 100 Main = 50A? Note I only need 30-40A.
Thanks!
I plan to add solar to my home and have a question about how many amps I can backfeed into my AC service panel using Net Metering. I know NEC 705.12 (D) (3) limits this to 120% of the service panel busbar capacity minus the main circuit breaker rating.
I have an old GE panel from the ‘70s, Model number TM1410MUF that has a 100A main breaker, so at first glance it looks like I can only have a 20A solar breaker. But, the label on the door says “Main Ratings 120/240V A-C 3—WIRE”, then below that it says “125A Max SEE MAIN CIR. BKR. RATING”.
Is this saying my busbar rating is 125A, and so would I be able to install a solar breaker (1.2 x 125) – 100 Main = 50A? Note I only need 30-40A.
Thanks!
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