Aic

[sharan]

Existing MLO panel in the field is 100 amps, 120/208V, 10000 AIC rated panel. Upstream breaker feeding this from a distribution panel is rated at 65000 AIC.

The Inspector wants this panel to be rated at 22000 AIC. Do I have to change the panel or 65000 AIC rated upstream breaker is sufficient?

 

[jim dungar]

Existing MLO panel in the field is 100 amps, 120/208V, 10000 AIC rated panel. Upstream breaker feeding this from a distribution panel is rated at 65000 AIC.

The Inspector wants this panel to be rated at 22000 AIC. Do I have to change the panel or 65000 AIC rated upstream breaker is sufficient?

You need to check with the manufacturer to see if there is a listed "series-rating" available for your panel and breaker combination. If there is, then the panel needs to be labeled correctly. see 110.9, 110.22, and 240.86

If there is no series rating possible, or if the requirement is for a fully rated panel, you need to replace the 10kAIC breakers.

 

[bob]

Existing MLO panel in the field is 100 amps, 120/208V, 10000 AIC rated panel. Upstream breaker feeding this from a distribution panel is rated at 65000 AIC.

The Inspector wants this panel to be rated at 22000 AIC. Do I have to change the panel or 65000 AIC rated upstream breaker is sufficient?

You have not provided enough information to make any kind of a decision.
Suppose the fault current at the panel is 40000 amps. Install a 22 kaic panel would do no good. First you need to determine what the fault current is at the main panel. That will determine if the 65 kaic breaker is required. The fact that it is there means nothing with out the fault current level. Then calculate the fault at the 100 amp panel. That will determine the rating required. I'm feel sure the inspector is just guessing.
Jim
I posted 1 microsecond after you did.

 

[GeorgeB]

The Inspector wants this panel to be rated at 22000 AIC. Do I have to change the panel or 65000 AIC rated upstream breaker is sufficient?

You have received 2 very good replies, but the question is why does the inspector WANT 22 kaic. I've worked on panels which were fed from a 65 kaic system that had no aic requirement over (calculated) 4500 amps.