[AT] Welder shocks

[charlie hill]

Cecil.  to me this is a fairly clear.  You were a better ground
than the ground cable.   Either you didn't have a good earth ground
or your ground cable wasn't making good contact or possibly
the part of the trailer you were welding on didn't have a good ground
with the place that you connected the ground clamp.   Electricity is
going to take the best path to ground.

Charlie

-----Original Message----- 
From: Cecil Bearden 
Sent: Saturday, June 17, 2017 8:24 AM 
To: at at lists.antique-tractor.com 
Subject: Re: [AT] Welder shocks 

I was welding on my new trailer yesterday to install a box for the 
chains and binders etc.  I have several rebuilt Lincoln Idealarc 250 
AC/DC welders I bought from a Vo-Tech.  While I know not to hold on to 
the electrode or holder and touch the ground, this welder was shocking 
me from the ground side.  It was about 95deg with 80% humidity, I was 
sitting on the ground, and had leather gloves on.  The trailer was 
hooked t o the ground cable, and the trailer jacks were down, but on 
gravel.  This is the first time I have been shocked off one of these 
Lincolns.  I used to have an old Craftsman AC welder that I had to drive 
a rod in the ground and tack weld it to the work when welding to prevent 
shock.    The reason this one hurt so bad this time, I tore my rotator 
cuff for the 3rd time last week, and I that hand was the contact with 
the trailer.  It caused such a violent muscle spasm that I couldn't 
finish up from the pain in my shoulder.   I guess I need to drive in a 
ground rod and hook a battery jumper to the ground or trailer.    If I 
hooked a grounded cable to the work side of the welder, would that do 
the same thing, or should it be at the trailer or work?  I should also 
supply some additional information.  The welder is connected to the 
power with a 50 ft 6/3 cable, and I was welding on DC reverse 
polarity.   I keep this welder on reverse polarity.

I know some of you guys have had this same problem.  This trailer is my 
tractor hauler, it has a hydraulic tail and hydraulic jacks and I just 
mounted a 9500 lb winch on the front, and am trying to get a wireless 
control that will work.   I need to go pick up a 4010 John Deere with a 
loader that has been sitting about 5 years and it has both a rear tire 
flat and a front one.

Cecil in OKla


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