choosing wire size

Discussion in 'General Electronics Chat' started by Dougm, Apr 19, 2007.

  1. Dougm

    Thread Starter New Member

    Apr 19, 2007
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    Can anyone tell me what size wire I need for a 3 phase, 240V, 30A AC electric motor?
     
  2. recca02

    Senior Member

    Apr 2, 2007
    1,211
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    are u talking about windind wires? if connecting wires
    i think specifying the current shud be good enough to buy a wire.
     
  3. beenthere

    Retired Moderator

    Apr 20, 2004
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  4. Dougm

    Thread Starter New Member

    Apr 19, 2007
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    This is stranded wire.
     
  5. Dougm

    Thread Starter New Member

    Apr 19, 2007
    3
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    Beenthere: the chart does not indicate the wire voltage.
     
  6. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Wire voltage is limited by insulation type and thickness, not by wire size. Regular THHN insulation is good for around 600 Volts
     
  7. windy

    Member

    Apr 19, 2007
    26
    0
    as far as voltage wiresize is not figured on wattage it is figured on amps. No matter what voltage you are using the wire size is per amps. your wire size will also figure in for start current and pf of the motor, as well as distance from the panel. No matter how short the distance from the panel use the wire size in your chart. Calculate the wire size if over the distance limit.
     
  8. Papabravo

    Expert

    Feb 24, 2006
    10,138
    1,789
    Rule of thumb is 700 circular mils per Ampere
     
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