Cable shielding

Discussion in 'General Electronics Chat' started by Dritech, Mar 13, 2014.

  1. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    Hi,

    I will be passing signal cables and DC motor power cables in the same cable carrier. To eliminate interference in the signal, I decided to use shielded cables.
    Is the one in the attached photo good for this application or shell I buy a cable with an overall shield?

    Thanks in advance.
     
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  2. #12

    Expert

    Nov 30, 2010
    16,345
    6,829
    That IS a shielded cable. Look deeper and see that the copper is wound spiral on the outside of the insulated conductors.
     
  3. Dritech

    Thread Starter Well-Known Member

    Sep 21, 2011
    756
    5
    Last edited: Mar 13, 2014
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,566
    2,379
    With DC motor cables it is usually sufficient to twist them tightly unless already in a sheathed cable.
    This tends to cancel out any radiated EMI.
    It is the encoder cables etc that need shield, if used.
    Max.
     
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  5. #12

    Expert

    Nov 30, 2010
    16,345
    6,829
    Arrgh! It takes a lot of reading and research to find the very best. Spiral wound, braided, aluminum foil with a runner wire, aluminum foil AND a braid...the proof is in the specs. Running the motor power in one twisted, shielded pair cable and the signal in another would give (2) two layers of shielding.
     
    Last edited: Mar 13, 2014
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