120 % rule for solar busbars

I explain the 120% rule for solar busbars. There are a few different ways to correctly size it, but this is the most common. It also clarifies a mistake I made in a different video, where I misused it.
The content in this video is in no way to be substituted for advice from a licensed Electrician/Engineer in your State and municipality. For exact and complete details consult a licensed Electrician/Engineer that works with the local jurisdiction in your area. Never disregard professional information based off information you have seen or read in this content.

[@Joe-qw6il]

Do you think inspector would allow if I went 125% instead of 120%? I have a 200A main breaker and I’m adding an 8.8 kw system which would need a 50A breaker, thanks

[@SolidElectricalSolutions]

You would have to ask your AHJ but to avoid that conversation I would downsize the main breaker, as long as my load calculation would allow for it.

[@rodneyriddnauer]

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