I keep getting shocked!

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nace186

Platinum Member
Sep 16, 2006
2,356
0
76
There's this trick I heard a while back: Keep a quarter coin in your pocket. when you think you are going to get shock, hold the quarter and touch other metals with it instead of your hand.
 

jaedaliu

Platinum Member
Feb 25, 2005
2,670
1
81
have to solder again

If I die, I leave everything to Highland

Apparently one of the guys I work with was schocked yesterday in the lab. The lab with the ESD guarded floors.

Get your boss to buy a wrist strap.
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
Apparently one of the guys I work with was schocked yesterday in the lab. The lab with the ESD guarded floors.

Get your boss to buy a wrist strap.

was ist dad "boss"?

I keep meaning to order one. Last time I got distracted by porcupine dryer balls.
 

sixone

Lifer
May 3, 2004
25,030
4
61
Are you wearing fleece again today? Take it off, before you start soldering.
 

sixone

Lifer
May 3, 2004
25,030
4
61
I'm not falling for another attempt to get me to strip.


Perknose still refuses to delete the pics from last time

I didn't ask for pics.

Though I must say, if you really cared, you wouldn't wait for me to ask.
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
I figured it out!

Its my soldering station. Don't know where the fault is yet, but its for sure in that. I never noticed it when only using the soldering iron because I normally have hold of a spool of solder that is connected to the base of my vice, therefor grounding me.

BASTARD! Now to tear it apart and find out where the fault is.
 

Raizinman

Platinum Member
Sep 7, 2007
2,353
74
91
meettomy.site
It also happens due to the rubber sole winter shoes most people wear these days. You can also spray water on the carpet. You can add a grounding strap on your ankle and let it dangle on the ground. That should work too.
 

Rubycon

Madame President
Aug 10, 2005
17,768
485
126
Static shocks and shocks from the flow of AC are completely different! They feel completely different as well.

As brought up many times with the source and environment that's conducive to receiving static shocks and becoming a victim of ESD failures, nobody has really discussed this "fork in the road" path!

A static shock will be very brief like a pulse. This is because it's a high voltage and the snap you hear is the sudden breakdown of the air between two points of potential. Potentials under the right conditions can be 100s of kilovolts! Current is fairly low in most cases but can be high enough to startle or even stun in extreme cases.

A shock from lines mains or a power supply in comparison is more of a continuous flow that will continue to occur until the power source is disconnected or whatever is bridging the gap is removed.

This discussion appears to be scenario number two. As RS pointed out previously you can easily have potential in an AC system between two devices if the power sources are unbalanced or you have a floating ground somewhere. With a DMM or VTVOM (high input impedance) it's easy to find the culprit. Bring any high resistance paths to ground down to as close as zero as possible and make sure everything is bonded to a common ground. This will eliminate differential potentials that you feel when connecting the path.

Also you may want to protect the circuit with a GFCI in case there is a total failure of chassis ground somewhere. If you touch a hot chassis with one hand and a grounded ESD safe station with the other, the flow can be sufficient to stop your heart!
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
Static shocks and shocks from the flow of AC are completely different! They feel completely different as well.

As brought up many times with the source and environment that's conducive to receiving static shocks and becoming a victim of ESD failures, nobody has really discussed this "fork in the road" path!

A static shock will be very brief like a pulse. This is because it's a high voltage and the snap you hear is the sudden breakdown of the air between two points of potential. Potentials under the right conditions can be 100s of kilovolts! Current is fairly low in most cases but can be high enough to startle or even stun in extreme cases.

A shock from lines mains or a power supply in comparison is more of a continuous flow that will continue to occur until the power source is disconnected or whatever is bridging the gap is removed.

This discussion appears to be scenario number two. As RS pointed out previously you can easily have potential in an AC system between two devices if the power sources are unbalanced or you have a floating ground somewhere. With a DMM or VTVOM (high input impedance) it's easy to find the culprit. Bring any high resistance paths to ground down to as close as zero as possible and make sure everything is bonded to a common ground. This will eliminate differential potentials that you feel when connecting the path.

Also you may want to protect the circuit with a GFCI in case there is a total failure of chassis ground somewhere. If you touch a hot chassis with one hand and a grounded ESD safe station with the other, the flow can be sufficient to stop your heart!

I for sure narrowed it down to my soldering station. Its a hot air/ IR heater/ soldering iron all in one. I have a spare iron at home, so I can test for sure tomorrow. I'm sure me holding solder when using the iron by itself grounded me to the vise.

No more zaps for me!
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
SON OF A
BAD WORD

I ordered a new iron and same result

Actually used a grounding strap and I got nailed worse than ever.

really bad word
THAT HURT!!!!
 

jaedaliu

Platinum Member
Feb 25, 2005
2,670
1
81
Are you storing enough charge to cast lightning yet?

Let's see, you're grounded. And you're getting shocked when you touch something. That thing needs to have its case grounded. (or ground yourself to the thing that's shocking you.)
 
May 11, 2008
20,261
1,151
126
Rubycon has a point. I am curious.
Do you charge up with static or is it AC leakage current ?
Is your soldering iron grounded to earth through a megaohm resistor or just a hard 0 ohm connection ?
If your Iron can build up charge, that is serious and potential lethal for your electronics you are soldering on.
I had a problem once that my old cute russian oscilloscoop would discharge through my probe killing my microcontrollers.
It had French text instead of Russian and it was my first oscilloscoop.

Such good memories.. Sniff... ...
http://www.youtube.com/watch?v=ujTlo3oo4as
 
Last edited:

zinfamous

No Lifer
Jul 12, 2006
111,136
30,086
146
It's all that northern ice in your air. It carries more static than the other types of ice.
 

dighn

Lifer
Aug 12, 2001
22,820
4
81
SON OF A
BAD WORD

I ordered a new iron and same result

Actually used a grounding strap and I got nailed worse than ever.

really bad word
THAT HURT!!!!

that makes no sense. you are grounded, the iron is grounded. do you have a faulty ground maybe? do you hear a *pop* when you get shocked? if so that's gotta be static b/c mains voltage isn't high enough to do that. if not it might just be leakage, possibly a bad ground? could do some measurements with a multimeter.
 
May 11, 2008
20,261
1,151
126
It might be the cushions of your chair in combination with your clothes. It can even be the separate cushions for your back and where you sit on. These two cushions can build up charge separately from each other on your clothes and you. Then when you touch something grounded, you discharge.
 

dighn

Lifer
Aug 12, 2001
22,820
4
81
It might be the cushions of your chair in combination with your clothes. It can even be the separate cushions for your back and where you sit on. These two cushions can build up charge separately from each other on your clothes and you. Then when you touch something grounded, you discharge.

hmm yes, you may be suddenly building up a large amount of charge that takes time to dissipate through the strap (they are designed to have a high value resistor so they don't kill you if you accidentally touch AC).
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
It might be the cushions of your chair in combination with your clothes. It can even be the separate cushions for your back and where you sit on. These two cushions can build up charge separately from each other on your clothes and you. Then when you touch something grounded, you discharge.

I stand up when I solder
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
that makes no sense. you are grounded, the iron is grounded. do you have a faulty ground maybe? do you hear a *pop* when you get shocked? if so that's gotta be static b/c mains voltage isn't high enough to do that. if not it might just be leakage, possibly a bad ground? could do some measurements with a multimeter.

I went as far as plugging a power cord into the same outlet with the hot wires taped up, so just the ground was exposed. Hooked the ground to my multimeter and poked everything that I touch. Nothing registered.

Today was bad enough that I have sworn off powering anything up until I either replace my solder station or figure it out. If I don't get it figured out tomorrow, I'll just order a new solder station.
 
May 11, 2008
20,261
1,151
126
On my work, our at the time secretary would get zapped every time she touched the metal knob of the door. As it turned out, when she got of her chair, her sweater and trousers would rub in a sliding fashion from her chair( She is not that tall). This would cause her to charge up statically. I made a little wand for. It was comprised as a little stick with 5 x 100K resistors in series. One end would be a pointy metal tip and the other end that she would hold was a copper tape strip soldered to the resistors. Every time she would have to open the door, she would touch the knob with her wand and discharge enough without pain to safely open the door. Maybe you could try the same. It could be you are already charged up before you touch the iron.
 

rudeguy

Lifer
Dec 27, 2001
47,351
14
61
On my work, our at the time secretary would get zapped every time she touched the metal knob of the door. As it turned out, when she got of her chair, her sweater and trousers would rub in a sliding fashion from her chair( She is not that tall). This would cause her to charge up statically. I made a little wand for. It was comprised as a little stick with 5 x 100K resistors in series. One end would be a pointy metal tip and the other end that she would hold was a copper tape strip soldered to the resistors. Every time she would have to open the door, she would touch the knob with her wand and discharge enough without pain to safely open the door. Maybe you could try the same. It could be you are already charged up before you touch the iron.

I'm going to try smashing something if it happens again.
 
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