AIC Ratings for osolete panels

[radicalx]

Would anyone know where to find AIC ratings for older and/or obsolete panelboards? Does the U.L. number help? I run across this when performing short circuit studies on existing systems. Thanks for any help, this forum looks pretty nice.

Dave

 

[ron]

I always end of contacting the manufacturer in such cases.

 

[jim dungar]

How old is old? What type of panels?

Prior to the early 80's many ratings were self-certified. Prior to the 60's, 5kAIC was common for molded case breakers.

 

[mdshunk]

I always end of contacting the manufacturer in such cases.

I wonder if you could do me a favor and ring up Trumbull in the morning?

 

[peter d]

I wonder if you could do me a favor and ring up Trumbull in the morning?

Oh, you mean GE?

 

[radicalx]

One of the panels I'm working with is a Zinsco 100A 277/480V with 20 20/1 breakers. Not sure of the manufacture data even.

 

[Jraef]

In the case of "unrated" equipment, I believe you must assume the rating is no greater than 5kA.

 

[radicalx]

In the case of "unrated" equipment, I believe you must assume the rating is no greater than 5kA.

I agree, and have been doing this. Causes people to make an effort to find out the true rating, too! BTW, I like your Dr. Evil pic, funny stuff. Thanks for the help!

Dave