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    billb7's Avatar
    billb7 Posts: 2, Reputation: 1
    New Member
    		  
    #1

    Jan 11, 2012, 08:45 PM
    Subpanel in different building
    I have 400 amp service main panel. One subpanel in same building. Between panels do wires have to be in conduit, if
    They are in 2x6 wall and 2x12 sealing?

    2nd panel in another building 50' away, no metal bonding between them. Am I right with having separate ufer in this building for the grounding?
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Jan 12, 2012, 04:36 AM
    Quote Originally Posted by billb7 View Post
    I have 400 amp service main panel. One subpanel in same building. Between panels do wires have to be in conduit, if
    They are in 2x6 wall and 2x12 sealing?
    Not unless your local codes require it.



    Quote Originally Posted by billb7 View Post
    2nd panel in another building 50' away, no metal bonding between them. Am I right with having separate ufer in this building for the grounding?
    A grounding electrode is required at a detached structure with a sub-panel. A ufer is the best type of electrode.

    This has nothing to do with the required equipment ground that you must run with the feeder conductors.

    Equipment grounding and grounding electrodes are two completely separate things with two completely separate functions.
    Grounding electrodes have nothing to do with clearing faults and tripping breakers on the secondary (120/240v) side.
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