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  1. #1
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    Default Denergizing Panel Requirement

    Does anybody have an idea how long it has been required for service panels to need no more than 6 throws of the hand to denergize the entire panel? I saw an older split bus panel yesterday that needed 10 throws to shut it down.

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  2. #2
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    Mar 2007
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    Default Re: Denergizing Panel Requirement

    I don't think there was ever a time 10 was okay. All I've ever heard was 6 and now 1. I suppose it's possible that there was a time period that it just wasn't addressed so you could find anything.

    But really, circuit breakers didn't come about until the 50's/60's and by the 60's I'm pretty sure it was the 6 throws of the hand rule. I seem to remember even the old Pushmatic panels from the 50's/60's had a 'sub-main' and fell under the 6 switches.


  3. #3
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    Default Re: Denergizing Panel Requirement

    Quote Originally Posted by Nick Ostrowski View Post
    Does anybody have an idea how long it has been required for service panels to need no more than 6 throws of the hand to denergize the entire panel? I saw an older split bus panel yesterday that needed 10 throws to shut it down.
    Back before time began ...

    If there were more than 6 in the section which serves as the main (and which controls the other section), then it was improperly done, with improper breakers (the label will show a schematic showing the double pole breakers in the 'main' section, and it probably will not show any single pole breaker in that section - because that would allow the total number of 'mains' to exceed 6).

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

  4. #4
    Richard Abrams's Avatar
    Richard Abrams Guest

    Cool Re: Denergizing Panel Requirement

    6 disconnects is still the rule However these need to be grouped together and labeled. I have been in business since 1977 and there was never 10 disconnects allowed. Also becareful if it is a split bus panel as there are little different.


  5. #5
    Join Date
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    Default Re: Denergizing Panel Requirement

    Thanks guys.


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