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4hv.org :: Forums :: General Science and Electronics
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Fun with a 225A arc welder!

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tesla500
Sat Jun 17 2006, 04:24AM Print
tesla500 Registered Member #347 Joined: Sat Mar 25 2006, 08:26AM
Location: Vancouver, Canada
Posts: 106
 		This is a video of us using a 225A welder to burn some old wires. The first two parts of the video are 26AWG wires underwater, with the current set to 30A (notice that the insulation of the wire glows, while remaining intact on the first part) . On the third part, the welder is connected to a computer power supply cable and connector, with the current set to maximum. All four wires of the cable are in parallel:

http://www3.telus.net/tesla/Wire%20Burn.avi

More to come soon...


Walter and David

[Edit: Fixed broken link]
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thom
Wed Jun 21 2006, 08:43AM
thom Registered Member #239 Joined: Thu Feb 23 2006, 03:15AM
Location: canada
Posts: 23
 		I like the large fan used to blow all of the toxic smoke outside.

:)
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Kipmans
Wed Jun 21 2006, 07:31PM
Kipmans Registered Member #91 Joined: Thu Feb 09 2006, 03:03PM
Location: The Netherlands
Posts: 45
 		I also did quite a few "burning wire" experiments (most of them were unintentionally, tough tongue). The smoke from the melting insulation is really nasty...
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ShawnLG
Wed Jun 21 2006, 07:58PM
ShawnLG Registered Member #286 Joined: Mon Mar 06 2006, 04:52AM
Location:
Posts: 399
 		Wire insulation is made of PVC, when burnt, it would release poisonous chloride gas. I hope you did not breath in any of the smoke.
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Thingmaker3
Thu Jun 22 2006, 05:17AM
Thingmaker3 Registered Member #124 Joined: Fri Feb 10 2006, 01:30PM
Location: Portland Oregon
Posts: 35
 		Not all insulation is PVC. Depends on the wire. Some insulation is made of teflon, various polyurathanes, Tefzel, neoprene, and all kinds of other stuff. Teflon fumes are not bad health-wise. A lot of the other stuff can indeed be nasty on the lungs.



Tes, how many watts and what wire size & length were used?
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Bjørn
Thu Jun 22 2006, 06:30AM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Teflon fumes are not bad health-wise
Except when they cause irritation, burns and death that is.
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Marko
Thu Jun 22 2006, 08:24AM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
Except when they cause irritation, burns and death that is.


I guess you will hardly die of half a meter of burned wite.
Doesn't smell good but it's far from some super-lethal-mass-destruction chemical weapon.

I hope yu didn't sniff that for long after filming entire thing... smile
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Eric
Thu Jun 22 2006, 05:55PM
Eric Registered Member #69 Joined: Thu Feb 09 2006, 07:42AM
Location:
Posts: 116
 		Most common wire insulation are PVC blends since PVC is so cheap. There are some powerful carcinogens put off by incomplete burning of PVC, dioxins, chlorinated furans, etc. The HCl is probably least of your worries. Not stuff you think about when you are young and invincible I guess.
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Thingmaker3
Thu Jun 22 2006, 11:16PM
Thingmaker3 Registered Member #124 Joined: Fri Feb 10 2006, 01:30PM
Location: Portland Oregon
Posts: 35
Bjørn Bæverfjord wrote ...

Teflon fumes are not bad health-wise
Except when they cause irritation, burns and death that is.
Ordinary air can cause irritation, burns and death if it's hot enough. Teflon fumes are not as bad as PVC fumes. This is why many fire codes require teflon insulated conductors in plenum spaces.



Walter and David, how many watts and what size & length of wire were used?
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Bjørn
Thu Jun 22 2006, 11:23PM
Bjørn Registered Member #27 Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Ordinary air can cause irritation, burns and death if it's hot enough.
In this case the air was not even warm so it is irrelevant. PTFE fumes are far more dangerous than air at room temperature.

Teflon fumes are not as bad as PVC fumes. This is why many fire codes require teflon insulated conductors in plenum spaces.
We can all agree with that.
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