Cable arrays in tray

Discussion in 'General Electronics Chat' started by jiugo.llamas, Nov 27, 2007.

  1. jiugo.llamas

    Thread Starter Member

    Nov 23, 2007
    10
    0
    Hi there,
    For industrial electrical installations, its very used feeding equipment with more than one cable per phase, I mean, 2, 3 or even 7 or 8 conductors per phase, depending of the power; I know in this situations, the it is recommended to use a trebol array (groups of 3 cables, one cable for each phase), which could be the problem if we group the cables per phases sepparately???
    Is there any other kind of array when carrying more than one cable per phase???

    Thank you
     
  2. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Grouping conductors from the same phase could result in induced voltage across length of the tray itself. Grouping conductors of different phases helps prevent this.
     
  3. jiugo.llamas

    Thread Starter Member

    Nov 23, 2007
    10
    0
    Where does this voltage could be reflected? I mean, voltage variations in the equipment fed? current leakage in tray?
     
  4. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Possible leakage losses in the tray. More importantly, the voltage induced across the tray can be very dangerous for people.

    If conductors of different phases are laid together, the magnetic fields tend to cancel out and no voltage is induced across the tray.

    Trays should also be bonded and grounded.
     
  5. jiugo.llamas

    Thread Starter Member

    Nov 23, 2007
    10
    0
    I know there are more cable arrays different of trebol´s for cables when carrying more than one conductor per phase, where could I get theese arrays??
     
  6. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    Google would be an excellent place to begin your quest.
     
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