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Thread: Whole House Surge Protect Sub Panel

  1. #1
    DIY Junior Member
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    Default Whole House Surge Protect Sub Panel

    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. #2
    Electrical Contractor/Instructor jwelectric's Avatar
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    If it is wired into a remote distribution panel then it wouldn’t be whole house would it?

  3. #3

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    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.

  4. #4
    Electrical Contractor/Instructor jwelectric's Avatar
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    Quote Originally Posted by 220/221 View Post
    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.
    Yes it will take the surge no matter where on the system it is installed

  5. #5
    Electrical Contractor Jim Port's Avatar
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    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.

  6. #6

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    IIRC the instructions call for the surge protection to be as close to the main breaker as possible


    A subpanel certainly might meet this.

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