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  1. #14
    Join Date
    Aug 2009
    Location
    Maine
    Posts
    3,471
    Yep wouldn't do 480 just 120. But usually I am the electrician. I know that sucs.
    I have customers that all I do is the electrical and no refrigeration. Then I do the refrigeration and no electrical. Go figure.


    Quote Originally Posted by johnqpublic View Post
    Shorting to ground can get interesting fast. Ive taken out entire sub panels and in one case put an entire building dark. Now i opt for the electrition route and let him take the risk. Im to old to take chances now and its not my ice cream melting.

  2. #15
    Join Date
    Jul 2005
    Location
    Phoenix, AZ
    Posts
    266
    Breaker tracer is the safest way.

    Sent from my DROID RAZR using Tapatalk 2

  3. #16
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,792
    Quote Originally Posted by crackertech View Post
    Shorting 460 to ground is exciting.
    One of the things that makes it exciting, is which breaker opens as a result...

    Not the equipment breaker

    Not the service main for the store

    nope

    It was the service main for the store and fifty apartment units above the store.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  4. #17
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,367
    What is a good breaker tracer?

  5. #18
    Join Date
    Nov 2007
    Location
    Mississippi
    Posts
    1,367
    I'd like to buy one that works with 120v to 460v hot or dead. Don't know if it exists.

  6. #19
    Join Date
    Sep 2005
    Location
    florida
    Posts
    5,514
    Quote Originally Posted by timebuilder View Post
    One of the things that makes it exciting, is which breaker opens as a result...

    Not the equipment breaker

    Not the service main for the store

    nope

    It was the service main for the store and fifty apartment units above the store.



    I love the smell of phosgene first thing in the morning:

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  7. #20
    Join Date
    Aug 2009
    Location
    Maine
    Posts
    3,471
    Many years ago I took out part of a small city. On the plus side I didn't have to worry about finding the breaker.

    Quote Originally Posted by timebuilder View Post
    One of the things that makes it exciting, is which breaker opens as a result...

    Not the equipment breaker

    Not the service main for the store

    nope

    It was the service main for the store and fifty apartment units above the store.

  8. #21
    Join Date
    Sep 2002
    Posts
    12,701

    You can short it across the line

    Which is what I used to do - until one day when I took out most of a city block. My little short somehow bypassed a dozen or more fuses and breakers and took out some huge multi thousand amp breaker out at the street somewhere.

    I acted as mystified as everybody else - but I know damned right well what really happened. <g>

    PHM
    -------




    Quote Originally Posted by Servicerunner View Post
    I'm wondering for you market vets out there, if you're new to a store and can't find a breaker (evap motor replacement, etc.) and don't have all day to hunt around to 10 different panels, what do you do? I was recently told to either follow the wire to a j box and disconnect there, or...ground the hot wire. I'm a little reluctant to ground a hot wire for a lot of reasons, mostly because if the breaker that serves the circuit in quesiton fails, I may take out that whole sub panel...or worse. But I'm just wondering what you vets do in this case.
    Thanks.
    PHM
    --------
    The conventional view serves to protect us from the painful job of thinking.

  9. #22
    Join Date
    Feb 2009
    Posts
    134
    I don't find breakers by shorting. I've located too many 14 wires attached to 60 or 80 Amp three phase breakers with no other wires think of the fire hazard in an old building with old over fused wiring.

  10. #23
    Join Date
    Aug 2004
    Location
    Tucson, Az
    Posts
    337
    This i the one I use. Saves a lot of headaches.


    http://www.toolup.com/greenlee_cs800...FRFgMgodlxEAcg
    Jim
    Tucson, Az
    Keeping the Ice Cream Frozen!

  11. #24
    Join Date
    Apr 2013
    Location
    In my head
    Posts
    313
    Thanks for all the good replies. Reason I asked is I had to work (Saturday!) on a walk in cooler (with a rear load case) that had condensation dripping from flashing installed above the evap fans for the rear load case. The coil was dirty and obstructing airflow causing the condensation to form in the flashing above it. Anyway, these were hussmann rear load cases, DD6X, and there's no way to get to the coil without removing each fan and motor assy. You could unplug the fan like all evap motors, but I couldn't access it with a spinning blade in front of it! So I just went to the j box and disconnected it there. Its tough and nerve wracking because it was stranded wire and was very well connected...I had to really tug and given the fact that it was a hot wire, made things interesting. But I got it done, reconnected hot, and store manager happy. I really don't understand why electricians don't just write in sharpie the panel number on each j box. Wouldn't take 3 seconds and would make so many people's lives easier.......

  12. #25
    Join Date
    Jan 2007
    Location
    Stongsville Oh
    Posts
    903
    I have a circuit tracer. It comes with a device that plugs into a receptacle and transmits a tone. The hand held receiver picks up the tone at the breaker when you get close to it. I modified the transmitter with a cord end and alligator clips so I can attach to wires rather than plug it in. The circuit is traced hot. This has helped me ring out power sources many times. Not to expensive of a device. Under 50 bucks.
    ckartson
    I didn't write the book I just read it!

  13. #26
    Join Date
    Feb 2008
    Location
    California
    Posts
    2,066
    Quote Originally Posted by Servicerunner View Post
    these were hussmann rear load cases, DD6X, and there's no way to get to the coil without removing each fan and motor assy. You could unplug the fan like all evap motors, but I couldn't access it with a spinning blade in front of it!
    If that's a watt motor, it can be stopped by dropping a rag on it.

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