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  1. #1
    Join Date
    Jan 2009
    Posts
    1

    Default Circuit breakers -240v-bridged non-bridged

    I was told that i must replace 2 - 240v breakers that are not internally bridged with2 that are internally bridged.how come.no problem with non-bridged

  2. #2
    Join Date
    Jun 2007
    Location
    Fayette County, Ohio
    Posts
    5,836

    Default Re: Circuit breakers -240v-bridged non-bridged

    The problem is that if a breaker trips it only breaks half the circuit leaving the other wire hot. That produces a dangerous situation. You should only use bridged breakers for 240 v circuits.
    Jack
    Be sure you live your life, because you are a long time dead.-Scottish Proverb

  3. #3
    Join Date
    May 2008
    Location
    Pacific Northwet
    Posts
    1,661

    Default Re: Circuit breakers -240v-bridged non-bridged

    They are also called "common trip" or "double pole." Note that Square D brand type "QO" double-pole breakers have a single handle, whereas most others have two handles linked together.

    This shouldn't be confused with "tandem" breakers, which are two single-pole breakers in one package connected to the same bus in the panel.
    Last edited by Fencepost; 01-28-2009 at 01:53 AM.
    The "Senior Member" designation under my name doesn't mean I know a lot, it just means I talk a lot.I've been a DIYer since I was 12 (thanks, Dad!). I have read several books on various home improvement topics. I do not have any current code books I can refer to. I was an apprentice plumber for two years.

  4. #4
    Join Date
    Jun 2007
    Location
    Shamokin, Pa.
    Posts
    645

    Default Re: Circuit breakers -240v-bridged non-bridged

    At one time it was common to thread a small piece of wire through the two breakers to indicate a tandem breaker. Not that it would ever trip both of them though. It would just provide a heads up.

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