Balake
Networking Engineer
Is it NEC compliant or even CEC if I used a 200 amp busbar with a 100 amp service breaker? I am trying to get a solar array installed on my house but I currently have a old 100amp Zinsco panel that flickers my lights so I am in need of replacing it.
Now due to the 120% rule
(Busbar ampacity x 1.2)-main breaker rating=max inverter amps
If I replace it with the same rated busbar and breaker then i can only install a 20amp inverter which limits me to a 3.8kw array. But, if I use a 200amp or even a 150amp busbar with a 100 amp main service breaker then I should be able to use a higher amp breaker for my inverter?
I have searched the NEC about this code but I am terrible at finding that code or maybe it doesnt exist.
TL:DR
Can I install a 200amp busbar with a 100amp service breaker so I can have a higher rated solar array? Where can I find this code in the NEC?
Now due to the 120% rule
(Busbar ampacity x 1.2)-main breaker rating=max inverter amps
If I replace it with the same rated busbar and breaker then i can only install a 20amp inverter which limits me to a 3.8kw array. But, if I use a 200amp or even a 150amp busbar with a 100 amp main service breaker then I should be able to use a higher amp breaker for my inverter?
I have searched the NEC about this code but I am terrible at finding that code or maybe it doesnt exist.
TL:DR
Can I install a 200amp busbar with a 100amp service breaker so I can have a higher rated solar array? Where can I find this code in the NEC?