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Thread: Even still more generator questions

  1. #21
    Join Date
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    If this is a "whole house" system and the ATS is ahead of the "main" panel, your service disconnect is likely going to be a switch ahead of all of that. This means that you will keep the ground and neutral conductors separate after that disconnect (your main is hence treated as a "sub" with regard to ground/neutrals). I've seen experienced guys miss that one.

  2. #22
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    May 2005
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    Quote Originally Posted by rnatalie View Post
    If this is a "whole house" system and the ATS is ahead of the "main" panel, your service disconnect is likely going to be a switch ahead of all of that. This means that you will keep the ground and neutral conductors separate after that disconnect (your main is hence treated as a "sub" with regard to ground/neutrals). I've seen experienced guys miss that one.
    I installed this ATS in place of an exterior main disco, so the neutral/EGC separation was already done, and the GECs already landed in the exterior main.

    Yes, I've installed many ATSs and never missed the need for the 4-wire feeder.
    Code references based on 2005 NEC
    Larry B. Fine
    Master Electrician
    Electrical Contractor
    Richmond, VA

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