supply grounding

Discussion in 'General Electronics Chat' started by PackratKing, Jul 27, 2008.

  1. PackratKing

    Thread Starter Well-Known Member

    Jul 13, 2008
    Same grounding question from a different thread.

    Cascading one additional transformer, from each of the five available 120 volt secondaries of an isolation trans. - to which point should the downstream transformers primary be grounded in order to :

    1. Avoid the creation of a " hot chassis "

    2. Avoid undue heating of all coils in the arrangement.

    Should I go back to the service panel ground of the initial line supply ?

    Some of these cascaded units will be quite a distance....... max 50 ft. from the base unit, with the ability to energize the base unit from the satellite, so I need to know how many, and what size conductors to lay between sites, being my main workshop room, and the garage.

    I tend to lean towards overkill when it comes to safety, if such is possible.
    Last edited: Jul 28, 2008
  2. scubasteve_911

    Senior Member

    Dec 27, 2007
    "Grounding is the essence of a prior question, concerning a power supply setup in which square one, is one of the isolation transformers mentioned in a former thread."

    huh ?

    I'm seriously confused, you should try to avoid superfluous words in your inquiry, they seem to add to the confusion.

  3. Wendy


    Mar 24, 2008
    As long as you are using a 3 wire system you should be cool, as long as one of the wires is ground.