Sub-panel on 100amp breaker failed inspection.

[Bcat]

I recently installed a sub-panel (rated at 125amp). It is supplied by #1 SER AL on a 100amp breaker in a 200amp sub panel. The inspector said the maximum breaker I can use is 90amp. Yet I've done the same setup before and passed. I know I can't put #2 SER AL on a 100amp breaker (changed breaker to 90amp to pass), and was told I had to use #1 SER AL. So now I'm confused, and frustrated. Which inspector do I believe? Do I just down size the breaker to 90amp to appease this inspector? Anyone, especially inspectors, care to weight in on this?

 

[LarryFine]

Welcome to the forum.

You are correct. Ask the inspector to look at the ampacity table again.

 

[infinity]

#1 aluminum is rated for 100 amps at 75°C. He's wrong so don't downsize anything.

Welcome to the forum.

 

[rc/retired]

Your installation is code compliant.

Ron