Page 1 of 2 12 LastLast
Results 1 to 13 of 20
  1. #1
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes

    contactor L2=120 volts L2=208 volts

    L1 to ground = 120 volts. - L2 to ground = 208 volts residential AC condenser this is voltage leading to the contactor. from L1 to L2 around 230 volts. helper used a cheater cord from L2 to ground and burn out his vacuum pump. always check voltage!! can anyone explain this please thank you in advance!!

  2. #2
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    2,406
    Post Likes
    Single pole contactor? going thru cap?
    UA Local 32

  3. #3
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    yes single pole contactor - voltage going direct to contactor - also air handler same way

  4. #4
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    2,406
    Post Likes
    Single phase incoming power from pole?
    UA Local 32

  5. #5
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    they might have had 3 phase -machine shop with large equipment Ac was used too cool small office,& breakroom

  6. #6
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    2,406
    Post Likes
    Then sounds like the high or wild leg. Maybe TB will chime in.
    UA Local 32

  7. Likes lkapigian liked this post.
  8. #7
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    sorry just realized typo in title - L1 to ground 120 volts -- L2 to ground = 208 volts

  9. #8
    Join Date
    Sep 2007
    Location
    edmonds wa
    Posts
    2,406
    Post Likes
    Did the vac pump go real fast, just before the smoke came out.
    UA Local 32

  10. Likes CleterD liked this post.
  11. #9
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    yes vacuum pump run real fast trip off on overload he took the pump apart and bypass some wires turn it back on and smoked the motor good lesson always check voltage!

  12. #10
    Join Date
    Aug 2014
    Location
    DC suburbs
    Posts
    290
    Post Likes
    Quote Originally Posted by doug1111 View Post
    yes vacuum pump run real fast trip off on overload he took the pump apart and bypass some wires turn it back on and smoked the motor good lesson always check voltage!
    Did it turn the condenser into a micro channel? Definitely grabbed the high leg of a delta.

  13. #11
    Join Date
    Aug 2002
    Location
    Southold, NY
    Posts
    7,809
    Post Likes
    Quote Originally Posted by doug1111 View Post
    yes vacuum pump run real fast trip off on overload he took the pump apart and bypass some wires turn it back on and smoked the motor good lesson always check voltage!
    So i guess he owes you a new pump

  14. #12
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    CleterD no the old train that was replaced was over 20 years old and the new system is running good

  15. #13
    Join Date
    Aug 2011
    Location
    central fl
    Posts
    592
    Post Likes
    Pecmsg - no the vacuum pump belong to my helper and he ended up getting a used one for a cheap cheap price 7 CFM- but all in all it was an expensive learning experience will not happen again always check voltage!helpers class instructor explained the voltage situation but by the time he explained it to me we still both don't understand.

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Related Forums

Plumbing Talks | Contractor MagazineThe place where Electrical professionals meet.
Quality Home Comfort Awards