Old school type (horizontal) QOT2020 breaker question

[picker77]

What's the standard rule on the older horizontal or "side-by-side" QOT tandem breakers about which switch controls which circuit, since one of the hot wires is stacked or hidden behind the other?
Thanks!

 

[Megawatt]

What's the standard rule on the older horizontal or "side-by-side" QOT tandem breakers about which switch controls which circuit, since one of the hot wires is stacked or hidden behind the other?
Thanks!

Could you please send me a picture

 

[picker77]

I have ordered a couple of identical spares of this type breaker that I'll have in hand in a couple of days, at which time of course I can simply use an ohmmeter to answer my own question, but in the meantime here's a photo of five QOT2020's in this older style that are currently installed in my 1979 vintage QO 30-40MW200 load center. All these have the CTL "hook". There are authorized positions for 10 of these breakers in this particular panel. It appears that the more modern QO load center tandems have two vertically stacked switches, and the hot wire connectors are also visible and side by side, unlike these.

 

[Megawatt]

I have ordered a couple of identical spares of this type breaker that I'll have in hand in a couple of days, at which time of course I can simply use an ohmmeter to answer my own question, but in the meantime here's a photo of five QOT2020's in this older style that are currently installed in my 1979 vintage QO 30-40MW200 load center. All these have the CTL "hook". There are authorized positions for 10 of these breakers in this particular panel. It appears that the more modern QO load center tandems have two vertically stacked switches, and the hot wire connectors are also visible and side by side, unlike these.

Are you talking about the breakers being double tapped which is not allowed. One breaker one wire.

 

[Megawatt]

I have ordered a couple of identical spares of this type breaker that I'll have in hand in a couple of days, at which time of course I can simply use an ohmmeter to answer my own question, but in the meantime here's a photo of five QOT2020's in this older style that are currently installed in my 1979 vintage QO 30-40MW200 load center. All these have the CTL "hook". There are authorized positions for 10 of these breakers in this particular panel. It appears that the more modern QO load center tandems have two vertically stacked switches, and the hot wire connectors are also visible and side by side, unlike these.

I have ordered a couple of identical spares of this type breaker that I'll have in hand in a couple of days, at which time of course I can simply use an ohmmeter to answer my own question, but in the meantime here's a photo of five QOT2020's in this older style that are currently installed in my 1979 vintage QO 30-40MW200 load center. All these have the CTL "hook". There are authorized positions for 10 of these breakers in this particular panel. It appears that the more modern QO load center tandems have two vertically stacked switches, and the hot wire connectors are also visible and side by side, unlike these.

There is no standard rule for random breakers. They are designed to be able to add more circuits since a standard breaker is 1 inch and tandem breakers are 1/2 inch but still only one wire is
allowed

 

[picker77]

Thanks for the reply, and have a great week.

 

[davesparks]

Put your voltage tester in the visible terminal and turn each breaker off/on to see which one operates it.

 

[picker77]

Put your voltage tester in the visible terminal and turn each breaker off/on to see which one operates it.

Duh.. LOL - makes sense. I was overthinking something that was actually dirt simple. Thanks, Dave.

 

[davesparks]

Are you talking about the breakers being double tapped which is not allowed. One breaker one wire.

No, he is asking which switch on the breaker operates which outgoing terminal.