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The ground clamp has voltage

I have a millermatic 200 and if i lay the ground lead on the welder it arcs.tested the ground lead and found the ground lead has about 16 volts going through it. it welds good as long as i have the work on the ground.

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WARNING ! You have an earth leak on the unit, before you do any more work with this set, have it checked by a qualified electrician, it can be HIGHLY dangerous to continue. the leakage can be on the mains side and can cause you serious injuries. dont atempt to repair or examine yourself.

Posted on Jan 23, 2009


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1 Answer

My millermatic 200 was working fine then all of sudden the wire would arc without pressing the trigger

you will need to open up the machine and find the relay / contactor chances are the contact are stuck together

Feb 18, 2015 | Welding Tools

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How to do conecct arc welding machine bx1-250

The black lead is connected to the metal you are attempting to weld, it has the silver ground clamp connected to it

The remaining red lead with the electrode holder connected to it holds the electrode
These welders are also capable of using 125 & 230 vac, 1-phase current from your mains there is usually a switchable indicator on the machine allowing you to select the input voltage

Nov 01, 2014 | Welding Tools

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My Miller Matic 200 will not arc. I have checked all connections, tried to arc across the ground clamp w/ the wire, nothing....

If everything is connected according to manual, then your problem must be contact box inside the machine. If it is a recent model 2005 or higher then it could be the main pc board. I would start by checking the ground cable and clamp first before send it to a repair shop.

Jan 01, 2011 | Miller Welding Tools

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On my millermatic 185 i pull the trigger and the wire comes out it does not arc against the ground, i tried it against the actual ground clamp, but it still doesnt arc

Is the ground clamp connected to the work piece?
if so, go through the trouble shooting section of the manual. If you don't have the manual, you can find info at

Mar 29, 2010 | Welding Tools

1 Answer

I have a speedline 180 amp arc welder and it doesn't want to arc i turn welder on it makes the nose its spose to make and i connect my earth go to strike and nothing happens? any ideas??

Check for output voltage (ac or DC depending on model).No voltage,welder has a problem.
You must have a clean ground clamp attached to bare metal with some welders to make them work.

Sep 08, 2009 | ARC Welding Tools

1 Answer


Turn off welder, unplug and press trigger to discharge any possible stored juice. Then, open side door and check the ground cable where it connects inside, it sounds like either ground or the hot is off. Once you determine those are both securely attached, close door, plug in power on, attach ground clamp to test piece off metal and try it again. Let me know if this helps! Thanks:)

May 08, 2009 | Welding Tools

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Have a Millermatic 200 wire welder! s/n:JJ048290!

the problem is your project is not grounded, attach the grounding cable from your welder to your project your welding.

Jan 26, 2009 | Welding Tools

2 Answers

Millermatic 200 will not weld

1 - Check the ground connection to the work, including the actual cable to clamp connection.

2 - Make sure that the wire feed rollers are nice and clean. The wire needs to be clean too.

3 - Check that the polarity changing wire connections are nice and tight, clean, etc.

4 - change and or service the contact tip at the end of the gun.

as always, gently clean out the loose junk inside the case. A clean welder is a happy welder. :-)

Nov 16, 2008 | Welding Tools

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