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  1. #1
    Join Date
    Jul 2008
    Posts
    17

    shielded control cable

    I have seen mention of using shielded cabling between indoor and outdoor
    units on a mini-split system.

    The LG heat pump we installed did not call for this in the installer paperwork.


    Should this be an area of concern?

    We are inclined to run shielded wiring for future jobs.

    Thoughts?

  2. #2
    Join Date
    Dec 2006
    Location
    Northern VA
    Posts
    389
    Are you referring to the cable to the controller? I think I would run shielded any ways.

  3. #3
    Join Date
    Dec 2007
    Location
    houston, texas
    Posts
    3,787
    the communication cables between indoor and outdoor units are supposed to be #14 wire. Never heard anything mentioned about shielded cable.
    I'm not tolerating Political Correctness anymore, from now on it's tell it like it is.

    Veto Pro Pak - The best tool bag you'll ever own






  4. #4
    Join Date
    Jan 2009
    Location
    ontario
    Posts
    50
    LG does recommend running shielded cable due to any electrical interference or noise that the dc voltage might pick up. Just keep the high voltage separated from the low voltage from the indoor and outdoor unit.

  5. #5
    Join Date
    Aug 2006
    Posts
    2,601
    Also only ground the sheild on one end, insulate other end. You don't want it flowing stray voltage back and forth, next to the DC signal.

  6. #6
    Join Date
    Nov 2001
    Location
    Port Saint Lucie, FL
    Posts
    1,594
    Nordyne IQ drives require shielded cable as well as quite a few mini split manufacturers.

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