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Old 06-03-2009, 06:29 PM   #1
TOU
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Default Calculating AIC rating of Panel

Be nice..newby here..

I am working on a project with 600amp at the main. the main feeds 3 panels, each with 200amps. my question is, how do you calculate the AIC rating of these 3 200amps panel?

the main is 120/208v, 3phase and so are the panels. what do i need to look at? pls give example. thank you guys.
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Old 06-03-2009, 06:51 PM   #2
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Quote:
Originally Posted by TOU View Post
Be nice..newby here..

I am working on a project with 600amp at the main. the main feeds 3 panels, each with 200amps. my question is, how do you calculate the AIC rating of these 3 200amps panel?

the main is 120/208v, 3phase and so are the panels. what do i need to look at? pls give example. thank you guys.
Well they do it with a program to calculate you need more info like feeder lengths wire size and if its copper or alu.

You need to tell us if its rigid conduit or alum or pvc or emt or underground or overhead the length is it parallel or a single run .
Next is this to be series rated or what 100 percent rating ?

Its kinda ohms law but just a little more info like the fault current of that transformer feeding the main panel needs to be known also ? lots of stuff there is a program you can get check out the web HANDBOOK OF ELECTRICAL POWER CALCULATION .


Take care

Last edited by nick; 06-03-2009 at 07:11 PM.
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Old 06-03-2009, 07:05 PM   #3
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i was actually hoping there is a way to do it by hand...i want to see the process

anyway, do you have the name of such a program?
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Old 06-03-2009, 07:20 PM   #4
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i was actually hoping there is a way to do it by hand...i want to see the process

anyway, do you have the name of such a program?
I believe its called a Current Fault Study or a cordination study done by a engineer .http://login.ecmweb.com/wall.aspx?ER...istic_fault%2F

Last edited by nick; 06-03-2009 at 07:25 PM.
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Old 06-03-2009, 07:28 PM   #5
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http://www.cooperbussmann.com/pdf/87...4e9d57d93c.pdf
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Old 06-04-2009, 12:08 PM   #6
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thank you guys..
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