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Old 05-21-2009, 07:56 PM   #1
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What is it called?


What is the name of a device that connects two single pole switches together, making them effectively a double pole switch?

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Old 05-21-2009, 07:58 PM   #2
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What is it called?


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Originally Posted by yellowdog5 View Post
What is the name of a device that connects two single pole switches together, making them effectively a double pole switch?
By switches, do you mean circuit breakers? If so, the device is called a handle tie.

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Old 05-21-2009, 08:12 PM   #3
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What is it called?


Yes, circuit breakers. Thank you!
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Old 05-21-2009, 09:04 PM   #4
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What is it called?


A handle tie.

These are only good in certain applications. This is not the same as a two-pole common trip breaker.
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Old 05-21-2009, 09:20 PM   #5
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What is it called?


240 volt single or three phase circuits or feeders.
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Old 05-21-2009, 09:30 PM   #6
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What is it called?


You can't tie two 110v standard breakers together to form a 220v breaker, since they'd both be on the same leg of your transformer and still be 110v.

220v breakers tie into both legs.

found out the hard way one time, i thought i had smarted out the breaker manufacturers. DOH!
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Old 05-21-2009, 10:02 PM   #7
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What is it called?


You still trying to cobble that Zinsco panel of yours?



You could have had it replaced by now for under 50 bucks.
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Old 05-21-2009, 10:08 PM   #8
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Originally Posted by johnnyboy View Post
You can't tie two 110v standard breakers together to form a 220v breaker, since they'd both be on the same leg of your transformer and still be 110v.

220v breakers tie into both legs.

found out the hard way one time, i thought i had smarted out the breaker manufacturers. DOH!
This is only partially true and only for certain breakers. FPE and GE skinny to be exact.

Most others two single-pole breakers WILL give you 240v. Again, a handle tie is not acceptable for this though.
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Old 05-22-2009, 11:42 AM   #9
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What is it called?


I just realized that the Zinsco bus will accept thin 2 pole breakers.

This is a thin two pole 30 that would fit in your panel. The two pole thin 50 would be the same size. You can do what you want because of the Zinsco style bus.


It's still not real safe to pull out old breakers in this style of panel. They do get stuck and often have to be coaxed out.

Last edited by 220/221; 05-22-2009 at 11:51 AM.
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Old 05-22-2009, 02:16 PM   #10
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What is it called?


Quote:
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what kind of applications?
...or multiwire branch circuits
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Old 05-22-2009, 02:21 PM   #11
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What is it called?


On some GE panels you could. But it's STILL not the same as a 2-pole Circuit Breaker! A 2-pole breaker has an internal common-trip mechanism!
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Old 05-22-2009, 02:28 PM   #12
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...or multiwire branch circuits
Unless there are also 240v loads a MWBC does not need a "common trip" breaker. A handle tie is sufficient.
This is also only code required under the 2008 NEC. Before that there was NO requirement for a handle tie.
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Old 05-22-2009, 04:52 PM   #13
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Unless there are also 240v loads a MWBC does not need a "common trip" breaker. A handle tie is sufficient.
This is also only code required under the 2008 NEC. Before that there was NO requirement for a handle tie.

fast1 asked for kinds of applications for the handle tie, and a MWBC is one such application.
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Last edited by williswires; 05-22-2009 at 04:54 PM.
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Old 05-22-2009, 05:03 PM   #14
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What is it called?


Quote:
Originally Posted by fast1 View Post
what kind of applications?
Why, tying handles, of course!
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Old 05-22-2009, 05:16 PM   #15
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Quote:
Originally Posted by williswires View Post
fast1 asked for kinds of applications for the handle tie, and a MWBC is one such application.
OK, I messed up completely.
You are correct. In post #6 and in my reply to you I was referring to common trip breakers. Not handle ties.
My mind is elsewhere today.
Sorry.

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