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DPDT Switch

Discussion in 'Electronic Repair' started by cnctut, May 14, 2005.

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  1. cnctut

    cnctut Guest

    I'm trying to locate a DPDT rocker switch--12V 8amp--for a 3-way
    electrical installation for my RV. Any suggestions? Auto parts stores
    no help?


  2. Ken Weitzel

    Ken Weitzel Guest

  3. Are you wiring three way or four way? A three way uses two SPDT switches
    back to back with two travelers. You only need a DPDT when adding a
    third switch.
    Joe Leikhim K4SAT
    "The RFI-EMI-GUY"

    The Lost Deep Thoughts By: Jack Handey
    Before a mad scientist goes mad, there's probably a time
    when he's only partially mad. And this is the time when he's
    going to throw his best parties.
  4. NSM

    NSM Guest

    Sounds like you want a battery changeover switch. Try an RV seller - they'll
    point you to places.
  5. cnctut

    cnctut Guest

    Thanks everyone--to answer each question--

    1. It would be a 3-way switch setup--I have two SPDT switches currently
    and would like to add a third.
    2. Radio Shack was the first place I tried--the young'ns working there
    aren't like days of old--they weren't familiar with the term DPDT--and
    had none in stock in the switch area
    3. Visited local RV dealer--best they could do was to offer two switchs
    to gang together
    4. Attempting to move the water pump switch to the kitchen where it
    should have been in the first place.

    Thanks again

  6. Ken Weitzel

    Ken Weitzel Guest

    Hi Tut...

    They just don't make them younger folks like they used to :)

    The RS part number is on the link I sent; ask 'em to
    order in one or two for you.

    Take care.

  7. Rick

    Rick Guest

    I'm not sure why RS even bothers any more. Most of their
    stores are the size of shoeboxes and 99% of the time don't
    have what you're looking for.
  8. cnctut

    cnctut Guest

    Ken--looks like that switch will work--the RS guys had even given me a
    new catalog that I went through with a fine tooth comb but didn't see
    the DPDT you found so quickly. I feel silly--thanks again.

  9. cnctut

    cnctut Guest

    It would be a total of 3 switches working independently.

    I miss Jack Handey's comments on SNL--do you have his book? :)

  10. NSM

    NSM Guest

    "You've got questions - we've got idiots"!
  11. What you appear to need is the same as a domestic lighting intermediate
    switch - ie if you need to add a third switch to a two way switched
    circuit. These are DPDT types, but with internal strapping and only four
    accessible terminals. In the UK, they're often available in 20 amp AC, so
    in the US where currents must be greater they might well be ok at 8 amp DC.

    Most of the easily available DPDT rockers from UK component suppliers seem
    only to give an AC rating.
  12. cnctut

    cnctut Guest


    Thanks Dave--I was wondering how interchangeable 120V and 12V switches
    are--if it's only an I^2R thing, then I think I'm OK.

  13. Basically, I dunno. I've not found a direct correlation between types
    which give both specs.
  14. NSM

    NSM Guest

    Generally they are not. A search of some RV support sites found various
    remote controlled switches which might work better for you.
  15. cnctut

    cnctut Guest


    Thanks--I'm such a novice at this Google search thing--and I'm always
    impressed with what folks get find in a matter of seconds. If someone
    does makes a remote controlled SPDT switch--that would save me some
    significant installation time.


  16. It's rather easier to find a relay with a DC rating. Then the world's your
    oyster in the switch to operate it. But of course it will draw current
    when made - perhaps not ideal when running off batteries.
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