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    Thomasmith's Avatar
    Thomasmith Posts: 1, Reputation: 1
    New Member
    		  
    #1

    Jan 2, 2017, 11:53 AM
    Conductor sizing
    I have a
    600v three phase gen, 60hz, 40kw, 50kva, 8pf
    Class h insulation
    And a
    Three phase transformer
    45kva, 600v primary
    208vy/120v secondary
    4.8 impedance
    Conductor temp at 170 deg.
    Out of the secondary on the transformer I will go to a three phase panel.
    I need to know the conductor size between the gen and the primary of the transformer and between the secondary of the transformer and the panel.
    Also any tips tricks or hints would be greatly appreciated
    All runs are less than 5 feet.
    Thanks in advance
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #2

    Jan 2, 2017, 06:42 PM
    Are you seriously asking this question on a Home & Garden message board?
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #3

    Jan 3, 2017, 05:01 AM
    There is a whole section in the NEC that will tell you how to size transformer conductors.

    Read the Book!!
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
    Uber Member
    		  
    #4

    Jan 3, 2017, 11:59 AM
    This is hardly a DIY question! Look online at NEC Section 450 and 455.
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