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  1. #1
    Join Date
    Dec 2007
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    605

    compressor test cord

    anybody use a compressor test cord?and how is it connected?
    I'm guessing white to common,black to run,and green to start
    any help would be greatly appreciated
    thanks--jack
    do it right the first time!

  2. #2
    Join Date
    Apr 2007
    Location
    Philadelphia
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    2,193
    Quote Originally Posted by meoff View Post
    anybody use a compressor test cord?and how is it connected?
    I'm guessing white to common,black to run,and green to start
    any help would be greatly appreciated
    thanks--jack
    Do you mean a bump cord?
    A switch that would put 120 volts directly to the compressor?
    We used to make them in school for small domestic refrigeration stuff.

  3. #3
    Join Date
    Oct 2003
    Location
    Cincinnati,Ohio
    Posts
    21
    If you wire it that way,YOU WILL PUT YOUR EYE OUT!! I would recommend a good meter,and amp clamp to test with.

  4. #4
    Join Date
    Dec 2007
    Location
    sevierville TN.
    Posts
    177
    Quote Originally Posted by bryn View Post
    If you wire it that way,YOU WILL PUT YOUR EYE OUT!! I would recommend a good meter,and amp clamp to test with.
    I would recomend a lot more basic understanding. Put the tools down Pick up the books.

  5. #5
    Join Date
    Jan 2005
    Location
    Veterans Home Yaphank, NY
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    2,309

    Smile

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  6. #6
    Join Date
    Dec 2007
    Posts
    605
    it was a test question and I found it in modern refrigeration and a/c book but in modern refrig. it shows 4 leads and the test only used 3,common run and start.maybe I should contact them and tell them that they are stupid and their information is not correct?or do I merely suggest that they need to get their information correct before they put it in a study manual I had no tools in my hand only a book
    do it right the first time!

  7. #7
    Join Date
    Nov 2000
    Location
    Upstate, SC
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    2,919
    Maybe you should have included that information in your original post because I thought the same as the others when I read it. Post the edition of Modern Refrigeration and the page number and maybe one of us can take a look and get a better idea of what you are asking.

  8. #8
    Join Date
    Dec 2007
    Posts
    605
    Quote Originally Posted by BobbyBJr View Post
    Maybe you should have included that information in your original post because I thought the same as the others when I read it. Post the edition of Modern Refrigeration and the page number and maybe one of us can take a look and get a better idea of what you are asking.
    the way I posted was probably wrongbut I had never even heard of one and thought that the pro's here would laugh and know exactly what I was talking aboutas I wouldn't think they are that common but that is why I posted in tools and test equipment.I was using the 18th edition and found test cords on pages 428,429,430.on my test they leave only 3 leads for answers,common, start,run.and yes I am smart enough to know to only energise the start momentarily.I would think that a masters test would give all info. and not use something as dangerous as a test cordthat is close to a suicide cord in my opinion as the one they sell to provide a 120v outlet on a 240v source(although I cannot say I haven't used one or don't have one on the truck!)

    thanks anyhow---jack
    do it right the first time!

  9. #9
    Join Date
    Jan 2005
    Location
    Veterans Home Yaphank, NY
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    Quote Originally Posted by meoff View Post
    it was a test question and I found it in modern refrigeration and a/c book but in modern refrig. it shows 4 leads and the test only used 3,common run and start.maybe I should contact them and tell them that they are stupid and their information is not correct?or do I merely suggest that they need to get their information correct before they put it in a study manual I had no tools in my hand only a book
    The original idea was to connect a "Capacitor"

    Black-Common
    White-Run
    Green-Start through a "Capacitor"
    also should have a "Momentary-Switch" N/O
    RAM Teaching Tomorrows Technicians Today.

  10. #10
    Join Date
    Dec 2007
    Posts
    605
    Quote Originally Posted by icehouse View Post
    The original idea was to connect a "Capacitor"

    Black-Common
    White-Run
    Green-Start through a "Capacitor"
    also should have a "Momentary-Switch" N/O
    thanks icehouseI greatly appreciate your help
    do it right the first time!

  11. #11

    Hmm 4 th wire is just a chasis ground green

    the forth wire your instructor is thinking of is a chasis ground near the compressor . that is you green wire. and is printed in the hvac books at times. they wrote it that way just for safety measures. theres a permanant split capacitor type that uses a start capacitor wired diferent than some start systems. in any regards you should be able to use a start kit 3 in 1 and remove existing starter relays.. especially on a small frige system under 1 hp.
    if you do a search on the internet you can see the wire diagrams for psc and other types of motors. I too have recently started on the hvac. can allways start small , fridges , then ice machines, then walk ins. roof tops electronics is my next step up.

  12. #12
    Join Date
    Jan 2008
    Posts
    63
    i seen some in the late 80's. used to unlock commpreessors kind dangerous

  13. #13
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    Jan 2005
    Location
    Veterans Home Yaphank, NY
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    Quote Originally Posted by ray mcbriarty View Post
    i seen some in the late 80's. used to unlock compressors kind dangerous
    How so ? I've done this many times. Also my "Annie A-12" is set up with a reversing switch.
    RAM Teaching Tomorrows Technicians Today.

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