omega
Posted a lot
Posts: 1,060
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a short tale
about a week ago my battery went flat so ran the extension lead out,disconeted the battery and plugged the battery charger in.about 5 hours later i went outside to find all the cables melted together and smoking well.
turns out that if you don't pull a extension lead fully out heat builds up in it and can start a fire,i was only useing a 4amp battery charger as well and there where no cuts in the cable.
i have done this many many times in the past with no proplems.
browsing readers rides i see lots of pics of people doing the same as me and would hate to think of someone loseing there ride/garage for the same mistake that i made
also i was not useing a rcd breaker
not sure if this is the right place to post this.
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Mate had the same happen. If I hadn't seen it myself I wouldn't have believed a low current though a coiled wire could cause so much heat / damage. I've got several extention leads of differing lengths and far more useful than the big coil. Old washing machine wiring make good extentions of a couple of meters  Paul H |
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hamps
Posted a lot
www.medwayrscentre.co.uk
Posts: 2,077
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True, if still wound up, they act as a coil and heat up, seen it many times  be safe and not lazy people |
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seen it with a mig welder , wouldnt have expected it on a batt charger
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91 golf g60, 89 golf 16v , 88 polo breadvan
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bortaf
Posted a lot
Posts: 4,549
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TBH it's a well known thing (at least I though it was) but only on high consumption? had my PC on a coiled up lead for 8 years and appart from the odd magnetic field given off i've had no problems at all, you sure the charger wernt fooked ?
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Last Edit: Jan 4, 2012 13:45:21 GMT by bortaf
R.I.P photobucket
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mat91
Part of things
Posts: 399
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also see alot of this at caravan places its a rely bad practice
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The stupid is everywhere |
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I think all of mine tell you on them to never use them whilst still coiled. Obviously a bigger core diameter and lower current draw help.
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I've got Rovers.
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Garry
East Midlands
Posts: 1,722
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I've had this happen before, using an 12v RC car charger running off a 240v PSU and a 15m extension to the mains plug. Luckily I could smell the soft melting plastic before it went up.
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Last Edit: Jan 4, 2012 14:21:15 GMT by Garry
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scruff
Part of things
Posts: 621
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Mine has a lower amp rating when coiled and a thermal cutout.
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1994 Lotus Esprit - Fragile red turbo with pop up lights.
1980 Porsche 924 - Fragile red turbo with pop up lights.
I spy a trend...
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jonw
Part of things
Can open a Mouse with a File
Posts: 768
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OOps!! You form an induction heater that way!!!
If you need to coil excess, you shoul coil it in a S on the floor. That way the magnetic fields cancel out and it dosen't heat up!
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Suzuki SV650R The good
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Toyota Hybrid One pint or Two?
Ingredients of this post
Spam
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Vile beef trimming they won't even use in stock cubes
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TBH it's a well known thing (at least I though it was) and me, learnt in secondary school physics ;D Although i did have to tell one of the sainsburys i deliver to about it, they had wound theirs around a metal bar and were charing 4 electric trucks on it  |
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Seen this many time's, very bad not to uncoil a lead.........
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omega
Posted a lot
Posts: 1,060
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TBH it's a well known thing (at least I though it was) but only on high consumption? had my PC on a coiled up lead for 8 years and appart from the odd magnetic field given off i've had no problems at all, you sure the charger wernt fooked ? hi no charger still working i do hope people read and take note of this just looking through peoples threads and ive counted 6 extension leads being part used.i think in the dim and distant past someone had told me not to do this,but for years ive got away with it so you keep doing it. |
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TBH it's a well known thing (at least I though it was) and me, learnt in secondary school physics ;D Although I did have to tell one of the sainsburys I deliver to about it, they had wound theirs around a metal bar and were charing 4 electric trucks on it With the keys then 'magically' stuck to the pole no doubt? As well as anyone's fillings that had recently walked past... ;D |
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