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telectrix

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40m brand new 6mm 3core SWA all exposed, no visible damage. 238V at one end, bugger all at t'other. only good point is that customer supplied cable,so it's his problem getting it replaced. wondering if it's some cheap foreign stuff. anyone heard of bad SWA floating around?
 
Had a piece of 16mm swa that i retrieved from around a lungeing shed,two cores used,armoring as CPC and a label on spare red that read "Faulty". Looked perfect,and was giving me the eye...so stripped it and found strands staggered in length and separate to what must have been continuation of core. Never had this on any BICC cables,but may explain some failures on SWA cables of dubious origin. Then again,a simple in-and-out pin------,and the right corrosive conditions can do the same thing...
 
I had it on a length of 1.0mm years back, was a temp bit of wiring so i didn't test it beforehand it did make a bang though, was soon revealed by the blackened bulge, a bit of stripping back did also reveal what looked like a splice for the next length if copper as described above!
 
Once had send a drum of swa back whilst serving my time impossible to strip the inner insulation to expose the cores like super super hard plastic, boss did not listen to me thought as I was apprentice my fault and in was slow until wholesale did a recall !!!!
 
update: went back this morning (no rain), dissed both ends of cable and shorted one end.. bk-gy 0.3ohms. bn/gy and bn/bk off scale, even with 500V from megger up it. so deffo o/c brown. brand new cable. temp used gy for L and relying on armour for cpc till he can get replacement cable. lucky it ain't been buried yet.
 
Hi,

Had as similar one some years ago, about three hundred metres of 35 or 50mm SWA from a Switchroom to a Boiler House. Everything tested good when we put it in. A couple of weeks later get called to site , no power; check it out it's dead as a doornail. Ended up replacing the full length, luckily it was in concrete duct. Chopped up the cable into smaller lengths ( easier to take to the scrappers) but never found the fault; probably cut through it. We were certainly doing some head scratching with that one.

Regards.
 

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