safety first ladies and gents - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: April 23, 2012, 08:56:14 pm
content: Ok..why didn't he die as soon as he touched the water?What is in the box? A simple resistor or a SCR chopper/limiter?Edit:Possible explanation - the fuse box not connected to mains at all but to a welder outside the picture. Nothing in the box except a conductor connecting the two terminals.

author: siliconmix
author_rank: Frequent Contributor
timestamp: April 23, 2012, 09:02:11 pm
content: somethings fishy about this.fake probably.no welding mask.no good closing your eyes .

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 23, 2012, 09:08:15 pm
content: (Water cooled) resistor. I suspect the stick is metal coated carbon.I'd be more worried about lack of eye protection - I'm told arc-eye HURTS

author: Unknown
author_rank: Unknown
timestamp: April 23, 2012, 09:25:00 pm
content: Quote from: mikeselectricstuff on April 23, 2012, 09:08:15 pmI KNOW it does!!How about tesla coil arcs, do they cause arc eye?

author: Mechatrommer
author_rank: Super Contributor
timestamp: April 23, 2012, 11:26:55 pm
content: Quote from: HAL-42b on April 23, 2012, 09:25:00 pmthe worst part is... you cant do anything about it until it passes away.Quoteanything that burn outer layer of your eyes (from my inductive conclusion). i once believe the weld smoke causes this, but i was wrong, its the extreme UV exposure.

author: Psi
author_rank: Super Contributor
timestamp: April 24, 2012, 12:07:08 am
content: Most of the UV in a Tesla coil comes from the spark gap underneath.

author: Freighternut
author_rank: Regular Contributor
timestamp: April 24, 2012, 12:20:00 am
content: I have lived and worked in many parts of Asia and can tell you that the method shown of making contactto the mains supply is very common.I have seen this done with large stick welders pulling many amps!I used to have lots of fun stopping welders from from connecting to my UPS feeds via that method. The hooked wires oftenhad to be cut away afterwards as they had melted into supply rail by the heat generated

author: slateraptor
author_rank: Frequent Contributor
timestamp: April 24, 2012, 12:42:59 am
content: You'd be surprise just how prevalent this kind of fraud and idiocy is in not just the Philippines but that general region of the world. I'm certain saturation knows exactly what I'm talking about.

author: amyk
author_rank: Super Contributor
timestamp: April 24, 2012, 09:52:42 am
content: You might've seen this too:http://www.gully.org/~mackys/lj/africanarcwelder.jpg

author: G7PSK
author_rank: Super Contributor
timestamp: April 24, 2012, 10:14:31 am
content: Arc eye is very painful I have had it you don't need to be looking at an arc enough UV bounces of walls etc. I think that most people who have learnt to weld will have got arc eye at least once, more so in the past than today, before the auto darkening welding shields you had to learn to place the shield in front of you eyes just as you struck the arc so it was inevitable that at some point you flashed yourself. I have seen someone welding in Zimbabwe using an old sock wrapped around his eyes. I have an inverter type welder that weighs only a couple of kilos yet will run 2.5mm rods all day.

author: Sionyn
author_rank: Frequent Contributor
timestamp: April 24, 2012, 05:26:25 pm
content: not touch ground likely or supply not grounded

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: April 24, 2012, 07:50:18 pm
content: I rather liked this welding set I saw in Gdansk shipyard :

author: G7PSK
author_rank: Super Contributor
timestamp: April 24, 2012, 08:08:47 pm
content: Looks typical of 1930's to 40's equipment good plant lasts a long time.