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    danar's Avatar
    danar Posts: 69, Reputation: 2
    Junior Member
    		  
    #1

    Sep 7, 2009, 10:14 PM
    Neutral wire
    Our system voltage is 380/220, 3phase 4wire. If I have a load of purely 220 single phase connected to L-N on a distribution panel 380/220 with solid neutral, do I have to increase the size of the neutral wire of the feeder?

    <Moved from Electrical Engineering and fixed spelling of neutral - KISS>
    donf's Avatar
    donf Posts: 5,679, Reputation: 582
    Printers & Electronics Expert
    		  
    #2

    Sep 9, 2009, 01:57 AM

    The size of the conductors is determined by the load (amps) the conductor is expected.

    Without knowing the amperage needed, whether the load is a continuous "ON" or not and the distance it needs to be run, we would all be guessing.

    Please supply the necessary information.
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #3

    Sep 9, 2009, 04:10 AM
    Quote Originally Posted by danar View Post
    our system voltage is 380/220, 3phase 4wire. if i have a load of purely 220 single phase connected to L-N on a distribution panel 380/220 with solid neutral, do i have to increase the size of the neutral wire of the feeder?

    <Moved from Electrical Engineering and fixed spelling of neutral - KISS>
    What you need to do is have a qualified electrician do this installation for you.

    If you have to come to a "Home & Garden" DIY board to ask this then you are obviously not qualified to do this work.

    Sorry for speaking the truth.

    I also assume you are not in the US.
    danar's Avatar
    danar Posts: 69, Reputation: 2
    Junior Member
    		  
    #4

    Sep 12, 2009, 05:24 AM
    Quote Originally Posted by stanfortyman View Post
    What you need to do is have a qualified electrician do this installation for you.

    If you have to come to a "Home & Garden" DIY board to ask this then you are obviously not qualified to do this work.

    Sorry for speaking the truth.

    I also assume you are not in the US.
    You don't seems to understand the question ask... technically if load are balance in a 3phase system the current in the neural is zero amps... if the load is purely L-N there is a tendency that unbalance current may occurs.. bigger current migth flow to the neural wire..
    stanfortyman's Avatar
    stanfortyman Posts: 5,598, Reputation: 279
    Electrical & Lighting Expert
    		  
    #5

    Sep 12, 2009, 06:56 AM
    Quote Originally Posted by danar View Post
    you dont seems to understand the question ask... technically if load are balance in a 3phase system the current in the neural is zero amps... if the load is purely L-N there is a tendency that unbalance current may occurs.. bigger current migth flow to the neural wire..
    Oh, I understand perfectly.

    What you don't seem to understand is that if you have to come here to ask this then you are not qualified to do the job. I suggest you go to a superior and get this information? Surely there is someone in your company that knows what they are doing.

    I don't care what country you are in. Maybe this is why third world countries have such messed up electrical systems.
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