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.
Originally Posted by johnqpublic
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.
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>
Originally Posted by Servicerunner
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.
The conventional view serves to protect us from the painful job of thinking.
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.
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.......
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.
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.