I-Line PowerPact Breaker

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Little Bill

Little Bill

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What is the difference between an I-line PowerPact QBA222001 and QBA222003?
I know they are both 2-pole 200A breakers but I can't find the difference in them.
 
The last number indicates I-line phasing.

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Well these breakers are on the same side one on top of the other.
To simplify, I will just show what I have and ask it another way. The I-line panelboard has the QBA222001 on the top, which according to the chart Brant posted is an AB phasing. The QBA222003 is right below it and would be BA phasing. I need to add another 200A 2-pole breaker, do I need the AB or BA phasing? Does it matter where I put it?

 
Little Bill said:
Well these breakers are on the same side one on top of the other.
To simplify, I will just show what I have and ask it another way. The I-line panelboard has the QBA222001 on the top, which according to the chart Brant posted is an AB phasing. The QBA222003 is right below it and would be BA phasing. I need to add another 200A 2-pole breaker, do I need the AB or BA phasing? Does it matter where I put it?

Click to expand...

It’s up to you if you need to consider load balancing. If you had all 2-pole breakers, and all -1 type, you’d have no loads on C phase. Make sense?


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If I'm remembering correctly, I line busses are arranged (b) (a) (c).. and cb placement (or replacement) can go south real quick..
 
rambojoe said:
If I'm remembering correctly, I line busses are arranged (b) (a) (c).. and cb placement (or replacement) can go south real quick..
Click to expand...
I-line bussing is ABC front to rear, always. On single phase panels, the B phase bus exists even though it does not have a line/lug connection. Because of this all 1pole and 2pole breakers must be ordered with the desired phase connection, hence the digit in the part number (older style, like FA and Q2, breaker used letters instead of numbers)

Some people want breakers mounted with bus phasing ABC top to bottom, even though this is not an NEC requirement, for those situations you can order 2 and 3ppole breakers with 'opposite' phasing like BA versus AB.
 
brantmacga said:
It’s up to you if you need to consider load balancing. If you had all 2-pole breakers, and all -1 type, you’d have no loads on C phase. Make sense?


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Click to expand...
Yes, I understand balancing. What I'm trying to understand is the difference in AB and BA. Either one would be on both phase A & B.
 
Little Bill said:
Yes, I understand balancing. What I'm trying to understand is the difference in AB and BA. Either one would be on both phase A & B.
Click to expand...
Jim explained it in his last sentance:

"Some people want breakers mounted with bus phasing ABC top to bottom, even though this is not an NEC requirement, for those situations you can order 2 and 3ppole breakers with 'opposite' phasing like BA versus AB."

If you didnt coordinate it right, you could have you conductors be BAC as you work down instead of ABC.
 
electrofelon said:
Jim explained it in his last sentance:

"Some people want breakers mounted with bus phasing ABC top to bottom, even though this is not an NEC requirement, for those situations you can order 2 and 3ppole breakers with 'opposite' phasing like BA versus AB."

If you didnt coordinate it right, you could have you conductors be BAC as you work down instead of ABC.
Click to expand...
And if you do not have a C, you could end up with either ABAB or ABBA.
 
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