Whole House Surge Protect Sub Panel

Discussion in 'Electrical Forum discussion & Blog' started by accesspro, Feb 14, 2010.

  1. accesspro

    accesspro DIY Junior Member

    Joined:
    Feb 13, 2010
    Occupation:
    In the trades
    Location:
    escondido,ca
    I am finishing adding a new sub-panel for a customer.
    The main panel has no more room in it and is flush mounted on the exterior of the house.
    I want to add some surge protection. Would my installing a whole house surge protector at the sub-panel be much different than at the main?
    The sub is mounted back to back to the main and is fed w/ #8s.

    TIA

    Bob
     
  2. jwelectric

    jwelectric Electrical Contractor/Instructor

    Joined:
    Jun 14, 2007
    Occupation:
    Instructor
    Location:
    North Carolina
    If it is wired into a remote distribution panel then it wouldn’t be whole house would it?
     
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  4. Alectrician

    Alectrician DIY Senior Member

    Joined:
    Jun 15, 2007
    Uhhhh....that was the question.

    If it's wired into the main panel thru a breaker it protects everything on the bus....right? Does iot protect anything downstream on a sub panel? If so, would it not do the same thing in reverse since th sub and main are connected?

    I have no idea. I was hoping someone would know.
     
  5. jwelectric

    jwelectric Electrical Contractor/Instructor

    Joined:
    Jun 14, 2007
    Occupation:
    Instructor
    Location:
    North Carolina
    Yes it will take the surge no matter where on the system it is installed
     
  6. Jim Port

    Jim Port Electrical Contractor

    Joined:
    Aug 22, 2009
    Occupation:
    Electrical Contractor
    Location:
    Maryland
    IIRC the instructions call for the surge protection to be as close to the main breaker as possible. A subpanel certainly would not meet this.
     
  7. Alectrician

    Alectrician DIY Senior Member

    Joined:
    Jun 15, 2007


    A subpanel certainly might meet this.
     
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