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Wire Sizing for 380v/3ph

  1. Jul 7, 2010 #1
    I need to calculate the wire size for a Fan Coil Unit that uses 3.7kw @ 380v/3ph with a circuit of 70 meters one way.

    Also the wire size for a Air Handler Unit that uses 5.5kw @ 380v/3ph with a circuit length of 24m one way.
  2. jcsd
  3. Jul 7, 2010 #2


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    Staff: Mentor

    Welcome to PF.

    The submittals for those products will tell you what their full load amperage and recommended breaker size is. The associated wire size is set by code. Here's the US's code: http://www.armstrongssupply.com/wire_chart.htm
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