Gallery, Projects and General > How to's
How To Wire a Plug
John Swift:
Has any one had the pleasure of using the EP4 connector for mains use !
they look like a larger version of the old style XLR4 connectors
30 years ago I had a near miss unplugging an oscilloscope
both of the small scews retaining the insulator and pins had been lost
instead of removing the plug I , had just the diecast body in my hand
the inner part left in the live socket !!!
the cable is soldered to solder terminals inside
just to add to the fun , the BBC used a different pin out
to that used by Marconi and ITV
( Canford Audio and CPC still sell them for connecting loudspeakers
if you have not seen them )
andyf:
--- Quote from: John Swift on July 16, 2010, 09:38:04 AM ---30 years ago I had a near miss unplugging an oscilloscope
both of the small scews retaining the insulator and pins had been lost
instead of removing the plug I , had just the diecast body in my hand
the inner part left in the live socket !!!
the cable is soldered to solder terminals inside
--- End quote ---
I'm not familiar with that connector, John, but I had a similar :zap: with a standard UK 13A plug. Holding an old electric drill with an earthed metal case in my right hand, I tried to take the plug out of the socket with my left. The back came off the plug as I pulled on it, and my fingers brushed across the fuseholder (UK plugs have cartridge fuses within). I can still feel the invigorating 50Hz ripple passing from the fuse up my left arm, across my chest, down my right arm and away to earth via the body of the drill.
My lecturer for the radio ham exams was really paranoid about examining every 13A plug before sticking it in the socket. His toddler had found that a 1p coin is a nice gentle push fit between the prongs, and had left one there. It blew the plug and socket to bits, apparently. No doubt he is happier now that the lower end of the prongs have to be encased in plastic.
Andy
andreas:
Agree with Darren, as a truck electrician I never solder cables when repairing a wiring harness. Instead I crimp the cut cables using a copper ferrule and heat shrink tubing them, using a special kind of tube that have a hot glue inner lining, making the connection waterproof. :zap:
Andreas
Bluechip:
--- Quote from: andreas on July 16, 2010, 01:14:20 PM ---Agree with Darren, as a truck electrician I never solder cables when repairing a wiring harness. Instead I crimp the cut cables using a copper ferrule and heat shrink tubing them, using a special kind of tube that have a hot glue inner lining, making the connection waterproof. :zap:
Andreas
--- End quote ---
You young ones have it so easy now .... :lol:
Had to use these damn things in ancient times ... :bugeye:
http://www.standardelectricaldictionary.com/2009-01-joint-britannia.html
Evil instructor used to put a 100lb pull on them, if it came apart, do it again, and again :bang: :bang: etc. etc. until you got it right.
Even if it passed the pull test, it was 'do it again' 'cos he didn't like the look of it ::)
(I didn't like the look of him, but that counted for nowt ...)
Knee deep in wire, solder, and tears ... :( all coming back ...
Dave BC
John Swift:
Hi Bluechip
In the early 70's did your instructor have a brother that worked in St Helens ?
I now feel ancient , I remember 3 phase mercury arc rectifiers ,valves (tubes ) , nixie tubes and germanium transistors
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