Metal switch box schock

[ckadams00]

I have exposed metal conduit in my shop running to the electrical light switch by the door. The switch box is metal and every time I turn on the light I get a little shock from the box - opened it up and there is no ground wire in there. Is there a simple way to ground this switch/box?

Also, I posted the title before i had coffee, obviously.

 

[sberry]

There is,,, in theory this conduit runs to the box should be grounded, there may be a missing link here, missing bond somewhere in this system, along with faulty wire connection. This might be worth having a professional take a look at or someone who KNOWS and understands, not everyone that has ever wired a circuit that works fully grasps the concept,,, handyman and many Diy types miss here.
I am all for guys doing own work but,,, ylu are already getting a shock and the potential for this to change severity is absolutely unknown, this is piped, about as good as it gets and there is something wrong?

 

[sberry]

I saw one a while back where the old timer had fed a garage and used 2 feed wires thru an abandoned water pipe to a panel feed and used the pipe as the neutral to old fuse panel.

 

[superdel]

Did this just start happening recently, or have you been getting a shock for years? If it is a "new" thing, trace the wires back to the panel and tighten up the lug on the neutral bar. For that matter, while you are in there, tighten all of the neutrals up. Also if there is a junction somewhere between the switch and the panel make sure the wire nuts are tight. I have seen over the course of years where these connections vibrate loose or sometimes they are just taped together and shake loose.
It sure sounds like what is called a floating ground. Not hard to figure out, you just have to divide and conquer the circuit. Check the connections first and we'll go from there.
Do you know how to use a multimeter?

 

[ranger_dood]

Is it a momentary zap? Or if you keep your finger on there does it continue to buzz?

Just wondering if we're talking about static electricity discharge and not a live box.

 

[larry_g]

I had a hot one once that when the cover wire was screwed in the box heated up and would get you. Open the box and the problem went away. It took a couple of times to find the nick in the wire that the screw was contacting with. The ungrounded box was another problem.

lg
no neat sig line