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With Respect to Grounding in Computers

Discussion in 'General Electronics' started by Foobarius Frobinium, Sep 15, 2004.

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  1. I am aware that a ground loop can form when you have two or more
    computers or peripherals plugged in at different sockets and connected
    by a cable (be that RS232 or what have you; anything that conducts
    electricity). Very bad.

    So my question is: how is this dealt with? Must the electronics inside
    the chassis be connected to mains Earth? Would it be possible to exclude
    that and perhaps use the chassis as a ground plane? (I may be ignorant
    about electronics and not talking sense, but I understand that the
    chassis is used as a ground plane in lieu of actual Earth ground in car
    electronics) Tell me if I am wrong on any account as I am trying to
    learn electronics; they are something that have been on my mind and I
    think my knowledge of computers is insufficient if I don't know about
    their most fundamental principles)

    In that case, it would be possible to implement a floating ground
    (AFAIK, where common in all units is separate from mains Earth) or a
    single-point dealie where only one unit (again AFAIK) is connected at
    mains Earth. Note that I'm not talking about lifting the Earth
    altogether, that's terribly dangerous, I know that much.

    If not, then what dyou do?

    - Shimon
  2. no_one

    no_one Guest

    send signals optically over fiber, or differentially via transformer
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