enlighten me on breaker

Discussion in 'Electrical Forum discussion & Blog' started by snafflekid, Aug 26, 2007.

  1. snafflekid

    snafflekid Electrical Engineer

    Joined:
    Apr 23, 2007
    Occupation:
    Electrical Engineer
    What is the purpose of quad circuit breakers? Specifically, a Siemens QT breaker with 15/30/30/15 amp breakers where the center pair are common trip? I have also seen quad, tandem circuit breakers in the same configuration but only take two spaces.
     
    Last edited: Aug 26, 2007
  2. jwelectric

    jwelectric Electrical Contractor/Instructor

    Joined:
    Jun 14, 2007
    Occupation:
    Instructor
    Location:
    North Carolina
    You have one 15 amp and one 30 amp two pole breaker in one unit
     
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  4. jimbo

    jimbo Plumber

    Joined:
    Aug 31, 2004
    Location:
    San Diego
    It is simply just that...a double pole 30, and two 15's. Probably a convenicence for the installer, and maybe a little less expensive.

    Many brands make "regular" and "thin" breakers to work in the same panel.
     
  5. hj

    hj Moderator & Master Plumber Staff Member

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    Aug 31, 2004
    Occupation:
    Plumber
    Location:
    Cave Creek, Arizona
    breaker

    They are used when the box does not have adequate openings for all the breakers needed, assuming the panel has the capacity for the added loads.
     
  6. snafflekid

    snafflekid Electrical Engineer

    Joined:
    Apr 23, 2007
    Occupation:
    Electrical Engineer
    I thought I once saw MC cable (or maybe it was BX) that had 3 10 AWG wires and 3 14 AWG wire in it (or some similar configuration) and thought quad breakers were made to convieniently match with this cable in multiwire branch circuits??? HMM.
     
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