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  1. 01-09-2009, 12:00 PM #1
    bukzin
    bukzin is offline Regular Guest
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    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?
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  2. 01-09-2009, 12:20 PM #2
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    MB1211
    MB1211 is offline Professional Member
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    Are you referring to the cable to the controller? I think I would run shielded any ways.
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  3. 01-09-2009, 09:14 PM #3
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    Texas-Tech
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    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
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  4. 01-09-2009, 09:32 PM #4
    jpdc
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    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.
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  5. 01-11-2009, 08:10 AM #5
    madhat
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    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.
    I only have to make it work till I retire.
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  6. 01-12-2009, 12:54 AM #6
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    AIR PRO
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    Nordyne IQ drives require shielded cable as well as quite a few mini split manufacturers.
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