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Old 09-05-2013, 08:48 PM
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Default Stick welder shocking me on DCEP

While doing that car hauler axle install I used 7018 rod on DCEP as specified by the Miller calculator.

I got the crapped knocked out of me every time I touched the metal or held the ground clamp. Even through gloves and standing on my feet with rubber sole boots.

I was wet with sweat and my gloves were also damp but I wasn't grounded was I?

Anyway, I changed over to DCEN and it never shocked me again. I also noticed the rod ran better on DCEN than it did on DCEP

What the heck was happening? I don't usually get shocked and as hot as it is here I am usually always wet with sweat.
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Old 09-05-2013, 08:59 PM
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7018 is always better on electrode negative.
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Old 09-05-2013, 09:59 PM
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Originally Posted by milomilo View Post
7018 is always better on electrode negative.

Well someone oughtta tell Miller that! I thought their calculators were pretty good as a general guide but they don't even suggest 7018 can be ran well on DCEN.
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Old 09-05-2013, 10:29 PM
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Kind of sounds like bacon sizzling on DCEN. Slag comes off easier too.
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Old 09-05-2013, 10:53 PM
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Originally Posted by milomilo View Post
Kind of sounds like bacon sizzling on DCEN. Slag comes off easier too.
Sure does. Arc is much smoother and the puddle easier to define. Slag definitely comes off easier. I had to pound that crap off on DCEP.

Anyway, my actual post reason was to figure out why I got shocked on DCEP and not on DCEN? Does it have to do with the flow of the voltage?
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Old 09-05-2013, 11:51 PM
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I have always welded 7018 DCEP. I get zapped on occasion but I think it is mostly due to sweaty, wet, thin tig gloves.

One day I hooked the leads up on my TB backwards but didn't like welding 7018 like that at all. (Dcen)

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Old 09-06-2013, 12:00 AM
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Quote:
Originally Posted by milomilo View Post
7018 is always better on electrode negative.
Quote:
Originally Posted by milomilo View Post
Kind of sounds like bacon sizzling on DCEN. Slag comes off easier too.
And the added benefit of no penetration.
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Old 09-06-2013, 06:33 AM
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I can't even guess why DCEN would not shock you when DCEP did. Strange.

I always wondered why my old Lincoln book listed 7018 as an AC (primarily) or DCEN rod, no mention of DCEP.
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Old 09-06-2013, 07:38 AM
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There is no reason on a properly working welder for the "shock effect" to be significantly different if you reverse the polarity.

The only thing I can think of is a problem perhaps in the noise reduction caps that is allowing slight leakage from the input power side onto the output leads. It is not something that should be ignored as it could get a lot more unpleasant and posssibly deadly.

I have run a lot of stick welders in damp and even wet conditions and they certainly are unpleasant to change electrodes on. I wear latex gloves under my welding gloves now as a final barrier for that issue. ( I use the black gorilla gloves )
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Old 09-06-2013, 08:51 AM
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Quote:
Originally Posted by Tally ZJ View Post
I got the crapped knocked out of me every time I touched the metal or held the ground clamp. Even through gloves and standing on my feet with rubber sole boots.
What exactly were you doing when you got shocked?
For a shock to occur - there needs to be a path through you from the negative terminal to the positive terminal.

Hold the electrode in one hand and the ground clamp in the other - path is there from hand to hand.

Connect the ground clamp to the trailer, sit on trailer, change rods and the path is there again, from hands to butt.

But with you holding the rod holder by the grounded portion only there should not be a path through you, even if you touch the ground clamp or the trailer.

I suspect that the insulation on your rod holder is gone, allowing the current to flow into your rod hand and from there out to whatever ground you touch.
Or there is exposed copper where the lead connects to the rod holder that is contacting your moist glove. That's where I'd look first.
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