12v welding set up

Submitted: Tuesday, Oct 17, 2000 at 00:00
ThreadID: 12 Views:4260 Replies:4 FollowUps:0
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I plan to make up a set of leads, including hand piece and earth clamp to enable me to connect 2 twelve volt batteries so that I can perform basic welding tasks.

What size/rating cable should I use when wiring the batteries in such a way that they develop 24 v of power?
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Reply By: mark Callaghan - Tuesday, Oct 17, 2000 at 00:00

Tuesday, Oct 17, 2000 at 00:00
mark
I saw an advert in a 4wd magazine recently for such a set up. Either in 4X4 monthly or Overlander mags.
AnswerID: 9

Reply By: David Martin - Tuesday, Oct 17, 2000 at 00:00

Tuesday, Oct 17, 2000 at 00:00
Mark,
I did exactly this. You do not need much and you can get away with three high current jumper leads ie. a pair and one extra (Have two pairs they are handy - make sure the cables are very well connected to the handles - cheap ones generally have poor cable to clamp connections, use 200Amp or higher) If required you can replace one end of one red lead with a welding rod holder (I used the standard cable clamp). Hook the batteries as follows:Remove the batteries from the car (never weld with your batteries connected or installed in the car) Take a cable from the + of battery 1 over to the - of battery two, now take a cable from the - of battery 1 and connect it to the work piece, then connect your rod holder cable to the + of battery 2. You must use a welding glass (I carry some goggles and also a piece of welding glass (available from the hardware for about $5, this can be held in some cardboard to make a visor). You now have a welder which will start a 3.5mm electrod howvwer I had the best results with 2 or 2.5mm rods.
Good luck
AnswerID: 10

Reply By: Steve Barbuto - Tuesday, Nov 28, 2000 at 01:00

Tuesday, Nov 28, 2000 at 01:00
Mark,

You will give your batteries a real hard time with this method.... I would recommend getting a second alternator built up for the task. Nothing worse than getting the welder out to fix a little problem, and ending up with a car that wont start and two stuffed batteries.

Steve
AnswerID: 47

Reply By: Steve Barbuto - Tuesday, Nov 28, 2000 at 01:00

Tuesday, Nov 28, 2000 at 01:00
Mark,

You will give your batteries a real hard time with this method.... I would recommend getting a second alternator built up for the task. Nothing worse than getting the welder out to fix a little problem, and ending up with a car that wont start and two stuffed batteries.

Steve
AnswerID: 48

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