Need help reading breaker schematic

[R-mm]

Hello all I need some assistance reading the schematic on my breaker box. If I want to add a 120/240 circuit for an electric oven can I use any two empty slots on a given side or must I use one of the bottom four? I can not find a legend that explains the symbols on the

 

[walta]

It should work as long as you can avoid using breaker positions 19 -24

Walta

 

[R-mm]

That is confusing because 17-24 are where the existing 240 loads are connected...

 

[Movover]

17-24 will accept half breakers you can use these for double pole standard size breakers also in most cases

http://www.homedepot.com/p/GE-Q-Line-20-Amp-1-2-in-Single-Pole-Circuit-Breaker-THQP120/100174218

 

[R-mm]

So somebody has done the wrong thing by using slim breakers on number 1?


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[Movover]

So somebody has done the wrong thing by using slim breakers on number 1?


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Breaker 1 is not a slim it a tandem, 2 breakers built into 1 package (Not to be confided with Double pole). A slim is a half size breaker

 

[R-mm]

Ok so... i can either free up space by using more tandems above or adding slims in 17-24. I can put my 120/240 anywhere i make the space? And is it correct that 120/240 ALWAYS takes two slots there is no way to draw from both hots in a single slot?


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[Movover]

I would put the slims in 17-24 move the double poles to where you made room and I believe that will free you up enough. The new tandems have a molded piece that will not let them fit in any slot now because this is "cheating" and most panels are not designed for that extra load on the buss stabs. Of course the GJ way is the same way I fixed the problem and that is to install a larger panel

Yes 240V will always be 2 slots that I am aware of. No way to get both phases on 1 slot

 

[walta]

After seeing the photo, I think the diagram is wrong or the breakers are numbered strange order.

Walta

 

[dave89iroc]

I don't think the diagram matches the actual layout, I only count 20 breaker spots

 

[brewchief]

It looks to me like the bottom two full size slots will fit the half size breakers, there is a two pole breaker that's like two of the half size but IIRC you need to put it on the spot that it can hit both busses. This means a half size single then a two pole slim(same as one of the regular single pole) and then another half size. If you put them in the wrong spot you get both poles on the same bus.

That tandem at the top left is not a GE breaker and shouldn't be there at all.

With some shuffling you can make room, a larger panel or a sub panel will be in your future if you need much more room beyond that.

 

[mm08822]

After seeing the photo, I think the diagram is wrong or the breakers are numbered strange order.

Walta

The diagram is correct. The numbering is a little odd on the diagram b/c if you are using full size cb's in the bottom 2 slots it is only 2 ckts not 4. E.g. 17A and 17B would be better than 17 & 19.

 

[mm08822]

I don't think the diagram matches the actual layout, I only count 20 breaker spots

It is correct. Panel has 20 full size breaker slots. But the 2 bottom spaces (L & R) can use 1/2 size cb's and give the total of 24 ckts.

 

[mm08822]

It looks to me like the bottom two full size slots will fit the half size breakers, there is a two pole breaker that's like two of the half size but IIRC you need to put it on the spot that it can hit both busses. This means a half size single then a two pole slim(same as one of the regular single pole) and then another half size. If you put them in the wrong spot you get both poles on the same bus.

That tandem at the top left is not a GE breaker and shouldn't be there at all.

With some shuffling you can make room, a larger panel or a sub panel will be in your future if you need much more room beyond that.

Agreed, that top left tandem cb should not be in there. New panel should be in the plans.

Op, is this a sub or where is the main cb?

 

[wyliesdiesels]

Top left breaker looks like an Eaton BR.

It should be removed and replaced with a GE...

 

[dave89iroc]

It is correct. Panel has 20 full size breaker slots. But the 2 bottom spaces (L & R) can use 1/2 size cb's and give the total of 24 ckts.

I see it now, damn, they are trying to confuse people

 

[mm08822]

Top left breaker looks like an Eaton BR.

It should be removed and replaced with a GE...

Right, but a GE 1P only based on load center diagram.

 

[Norcal]

Top left breaker looks like an Eaton BR.

It should be removed and replaced with a GE...

It's a Siemens breaker, here is a photo of a Gould/ITE which is the original design of what is now Siemens, & the hack done to make them fit a GE.



The hack is required to make a competitive make twin breaker fit a space made for twins in a GE panel.

 

[Stuff]

GE does may a 2 pole / 240v tandem/slim. You can use it in slots 19/21 or 20/22 and then use slim/tandem on either side. Some recommend only using full size breakers for large loads but it does give you another option.

http://www.homedepot.com/p/GE-Q-Line-50-Amp-1-in-Double-Pole-Circuit-Breaker-THQP250/100356520

 

[R-mm]

Thanks guys I have a bunch of slims to replace small loads and a full size two pole for the oven.

I cant figure out what type of bushing i need for the armored cable coming out of the oven. Its about .9in outside diameter and I want to get it into a pretty std 4in metal box.

I noted that incorrect breaker too and will remedy.

 

[brewchief]

Looks like a fitting for 1/2" greenfield would be right.
The only place the slims will work is the bottom two spaces.

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[Bert_]

I cant figure out what type of bushing i need for the armored cable coming out of the oven. Its about .9in outside diameter and I want to get it into a pretty std 4in metal box.
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Any standard flex connector will work. I think that would be 1/2 flex, but not sure off the top of my head.