<a href=showthread.php?s=&postid=13462910#post13462910 target=_blank>Originally posted</a> by GlassReef
Help please!!! Any expert electricians?
Something just came up! Maybe someone can help. Had an electrician come out yesterday and run a line from the main breaker box to the fish room, where he installed a 2 slot distribution box. The line leaves the main box off a 40 amp 220 breaker (2 hot lines and a ground). Ends up in the distribution box as two 20 amp 110 breakers. So ... my problem: if I touch the outside of the distribution box (fish room) I get a small shock. Kind of like static from grabbing a car door in dry weather. I called the electrician and he just says nothing to worry about - but, of course, it worries me to no end. I'd hate to have a constantly charged aquarium. Are there any experts out there that can tell me what could cause the shock I'm experiencing and maybe more importantly, what I can do about it. Oh, BTW - after I've gotten the shock, it does not happen again until some time (undetermined) later.
I've been a Commercial Electrician for over ten years and done many projects like the one you are speaking of. My first concern is if you called the electrician and explained your situation and he told you there is nothing to worry about, I'd fire that electrician and get someone else b/c if you get shocked he doesn't know what he's doing. With that said. The wire from your main panel should have four wires in it if it is "Romex" there will be a black, Red, White and green if done correctly. The black and red wires should connect to the breaker
in the sub panel the white should have a separate buss bare just for that wire and the green
wire will have another buss bare or ground lug. The white and green wire SHOULD NOT BE CONNECTED TOGETHER in the panel in your fish room. This is called a floated neutral. The white and green wire is bonded together in your main panel so you don't need to do it again or you can have problems. Another issue is if he only ran two hots and a ground there is no way you'll be able to have receptacles (plugs) b/c 120volt receptacles require a neutral conductor. If you ran a 40 amp circuit make sure the wire size is #8 AWG for a 40 amp circuit. Sorry about the ranting but there's a lot of "electricians" that just plain scare me
when doing side work. So one reason for you "shocking" experience could be because the electrician is using that ground as a neutral and that neutral is carrying an load from another
circuit in the house. this is called a shared neutral and not done to often in residential applications but very common in commercial settings. So long story short make sure there is four wires going to your panel and follow my suggestions and I promise this will fix the problem just make sure also that all connections in your main panel (in the house) are tight
this includes all the white wires in the panel. If you have any other questions feel free to contact me.