Panel bussbar tab for tandem breakers

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  #1  
Old 12-02-12, 09:45 AM
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Panel bussbar tab for tandem breakers

I have a main circuit breaker panel with no identification on it other then the main breaker which is "Westinghouse WFP 2200T WFP2200T Circuit Breaker 781786-25867 390-676-04 0". The panel has a 200 amp main breaker with 20 notched circuit beaker buss tabs. I am thinking that 20 110 volt tandem circuit breakers can be installed in this panel for a total of 40 110 volt circuits. I am a bit fussy on the talk about old panels which I may or may not have since there is no ID on the panel. "For panelboards manufactured before adoption of the Class CTL standard, non-Class CTL tandem circuit breakers are allowed to be installed as replacement circuit breakers only". How do I determine if my panel was manufactured before adoption of the Class CTL standard and can I install tandem circuit breaker in this panel?
Thanks,
Oggie
 

Last edited by Nashkat1; 12-02-12 at 10:25 AM. Reason: Remove formatting
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  #2  
Old 12-02-12, 10:07 AM
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Do you have the cover for that panel ? Is the buss bar pictorial on it yet ?
 
  #3  
Old 12-02-12, 10:42 AM
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There had been paper glued to the cover but very little is left, nothing legible. If there are any identifiable markings on this panel it would have to be on the rear of the back panel or behind the buss bars. I didn't check there.
 

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Old 12-02-12, 11:45 AM
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I am thinking that 20 110 volt tandem circuit breakers can be installed in this panel for a total of 40 110 volt circuits.

I would NOT assume that. Most panels were never designed from the start to be loaded with tandem breakers. I would assume half or less could be tandems.

In re-reading your first post.....you said 20 notches were in the buss bars. How big is the total panel.
 
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Old 12-02-12, 01:42 PM
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I do not have the panel here where can measure it but it is about 28"x16"x7". There are 20 notched circuit beaker buss tabs. 10 110-volt breakers on each of the two busbars. There is a notch in the center of each tab that looks like it was specifically made to except tandem breakers. Because there is no confirmation on the panel I am searching for some proof or logical reason to feel comfortable that this panel is a 200 amp 20-Space 40-Circuit panel. As careful and meticulous as the electrical codes are I would think that a panel would be clearly marked. I am sure this was clearly marked on the paper that probably dry rotted the first summer and fell out when opened. Is there a web site with panel pictures I can compare this one with?
Thanks,
Oggie

Mod note: Oggie, it would save us some work and make your posts more legible if you would just type directly in the forum and omit the formatting.
 

Last edited by Nashkat1; 12-02-12 at 03:06 PM. Reason: Remove small font formatting.
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Old 12-02-12, 01:52 PM
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I meant total breaker spaces not dimensions....sorry.

We can't even be sure it's a Westinghouse panel just because it has a Westinghouse breaker in it. I'm guessing you're not able to shoot a pic of the panel. You would need to find a website of older panels.

Actually you can go to Google and enter "old electric panels" and then click on images. It'll give you hundreds of panels.
 
  #7  
Old 12-02-12, 02:49 PM
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That breaker number look's like it is Westinghouse check with Maraindustrial.com maybe they can identify the panel look's like it fits into a. B204040CT panel.
 
  #8  
Old 12-08-12, 04:41 AM
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Picture

Here is an outside picture of my panel. I have interier pictures if needed. I bought a Seimens CTL, with the rejection feature, tandem breaker to replace the ITE breaker installed. It installed and functioned perfectly. Am I safe to assume I have a CTL 20-space/40-circuit panel?
Thanks,
Oggie
 
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Old 12-09-12, 07:46 AM
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I bought a Seimens CTL, with the rejection feature, tandem breaker to replace the ITE breaker installed. It installed and functioned perfectly. Am I safe to assume I have a CTL 20-space/40-circuit panel?
I think it's a CTL panel; non-CTL breakers are for replacement only in pre 1968 vintage panels. That being said, I don't think you should have bought a Siemens breaker for it, I don't think they were ever Listed for that application. The proper breaker would be a Cutler-Hammer BR series breaker.
 
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Old 12-10-12, 11:56 AM
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Thanks for the info

Thanks for your reply. You are right I should have bought Cutler-Hammer BR series breaker.
 
  #11  
Old 12-11-12, 09:06 AM
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the correct breakers for that panel would be BR for normal size 1" single pole, 2" double poles, or BD series (ex. BD2020) for correct single space saver breakers and BQ series for double pole space savers (ex. BQ230230). There is a BR series single pole space saver but it is only for replacement use in panels that had no V notches and more expensive. BD series breakers are common and easy to find.
 
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Old 12-11-12, 09:12 AM
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BTW..if that is an old WFP2200T main that was the old Zinsco design breaker and VERY expensive to buy as these are no longer made. A new one is 200+ dollars so bear that in mind.
 
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