industrial electrical plug

JML755

Well-known Member
We recently received a control rack that we built years ago (before I worked here) for a customer (auto parts supplier). Our task was to do some evaluation on a software problem they were having. There were a couple of LARGE power supplies in it (besides the computer equipment) that were each on a dedicated circuit internally. We shipped it with a suitably sized SO cord on it. This is how they hooked it up in their plant. It gets better. A guy here mentioned he was called out there a couple of years ago because the "system didn't work" and found one of the wire nuts had come loose. He showed them the problem, their electrician twisted it back on, our guy turned around and left and they paid us for a service call.



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SO, what's the problem???? Billy Bob wired his that way and its worked fine for years so there...

GEEEEEEEEEE some people would insist such a junction to be in an accessible junction box which, if metal, is bonded to the Equipment Grounding Conductor, imagine that !!! They may even want the drop to be in some sort of armored or other durable cable SOME PEOPLE these days !!!!

John T (with tongue in cheek)
 
Hi John T do you have a Bubba codebook ? I think those wirenuts require a wad of duct tape for extra protection and to meet Bubba code..
 
don't laugh, i was troubleshooting an audio problem that lead me into the roof. station cable had a signal going out from the amp.. but never hit the speakers. in the middle of the run inside the drop ceiling, i found a setup like that. 2 wires spliced with some wire nuts.. bad splice at that...
 
(quoted from post at 12:03:21 11/13/14) We recently received a control rack that we built years ago (before I worked here) for a customer (auto parts supplier). Our task was to do some evaluation on a software problem they were having. There were a couple of LARGE power supplies in it (besides the computer equipment) that were each on a dedicated circuit internally. We shipped it with a suitably sized SO cord on it. This is how they hooked it up in their plant. It gets better. A guy here mentioned he was called out there a couple of years ago because the "system didn't work" and found one of the wire nuts had come loose. He showed them the problem, their electrician twisted it back on, our guy turned around and left and they paid us for a service call.

When going to Haiti I packed assorted boxes of Wire Nuts. There was not a single marret, twist-loc, wire nut, soldered joint of any sort. It was just wires twisted together and a wrap of black electrical tape.
 
When demoing the old horse shed at nearby farm, contractor first
found 6 marrette splices in 100 feet of NMD. Contractor stuck
shovel though insulation to pop breaker nope. Shovel lit up and
arcing cables etc. Check panel - connected to bus extension lugs,
unfused!!!! Lucky they didn't burn house down.
 
Don't say duct tape! I opened a rooftop HVAC unit at a school that had a 480 volt splice wraped with duct tape. Boss would not let any of us work on that unit... Duct tape Conducts electricity , if you don't belive me put an ohmm meter on some. joe
 
Bet they dident want to pay an electrician to wire up an outlet for the plug you supplied!
Ypop
 
I was talking to the engineer who did the s/w evaluation about this today. He said a guy from the company showed up the other day to pick up the rack. Turned out to be the manager of the test department it was located in. He asked our guy if everything "checked out ok". Our guy said, "uh, not entirely" and showed him the cord. His response: "oh, yeah, I know about that". :roll:
 

I wasn't here when the system was built but I'm pretty sure it would have gone out with an appropriate sized Hubbel twist-lock on it, so you're probably right. Knowing what's in the rack, it was probably a $50-60K piece of equipment to the customer. So scrimping on buying/installing a mating outlet is..... well, nuf said.
 
a little off topic, but once back in the early 70's when I was working for a cable tv outfit, I was in an attic running the drop when I discovered the whole house had been wired with barbed wire twisted around little ceramic insulators nailed to the ceiling joists. no wire nuts, just twisted together with a western union splice. Needless to say, they got reported to building inspector and power off 'til house was rewired. Customer was po'd that I reported him.
 
Did a large addition to a computer room for a large insurance company once. When the room was finished a lot of computer equipment came in that we hooked up. One machine had a receptacle on it that needed a suicide cord to hook it up. We refused to hook that one up.
If I remember right that machine was sent back.

Dusty
 
(quoted from post at 18:43:37 11/13/14) Don't say duct tape! I opened a rooftop HVAC unit at a school that had a 480 volt splice wraped with duct tape. Boss would not let any of us work on that unit... Duct tape Conducts electricity , if you don't belive me put an ohmm meter on some. joe

they actually make electrical grade duct tape. Not sure what one uses it for though.
 

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