increased AIC rating for dual line equipment

[starship2050]

I'm relatively new in SoCal . I was presented a question that I have no idea what they're talking about. It was stated to me that some circuit breaker for a piece of dual line equipment was rated at 10KAIC and that it was insufficient that it had to be increased. Can anyone tell me what this is about?

 

[zog]

Sounds like the available fault current is > the AIC rating of the breaker, meaning the breaker is not capable of clearing a fault if it occurs. So you need a higher rated breaker to replace it (Or reduce your available fault current), this is pretty common, we gets calls just like this everyday.

 

[charlie b]

I don't know what you mean by "dual line equipment." Can you explain the phrase?

 

[templdl]

Sounds like the available fault current is > the AIC rating of the breaker, meaning the breaker is not capable of clearing a fault if it occurs. So you need a higher rated breaker to replace it (Or reduce your available fault current), this is pretty common, we gets calls just like this everyday.

You could take a shot in the dark to see if the panel manufacturer has a breaker that can be installed upstream that would have a series rating woth the existing panel. You would most likey strike out but it's still worth a look.
Like Charlie B, I to would like for you to explain what "dual line equipment" is. We all have out little catch phrases or terms for diffent things in each one of our areas but I have never come across "dual line equipment" before.