I had an issue with moisture getting into my electrical panel. I found a tiny bit of oxidation on the neutral wire that is terminated in the neutral lug. It appeared as green on the tips of the strands of the wire. There is no corrosion however where the lug screw meets the wire. I have not had any apparent problems with my electric otherwise. As for the moisture, I think I have rectified any possible causes by sealing the conduit entering the panel. Fixing the driploop on my weatherhead and I have also started running a dehumidifier in the summer months in case its a condensation issue. I did not call an electrician to reterminate the wire though. If I have someone out right away, I fear if I did not correct the problem then it would occur again. And if I had already had an electrician re-terminate that wire, then there would likely not be enough slack in the wire to do so a second time without replacement of the feeder. So my question, should I be concerned than there is a bit of green on my copper? If the moisture is removed, does the copper continue to oxidize? I was thinking the neutral outside is bare and green from the weatherhead all the way to the transformer but I know that's not the same as being inside my equipment. What do you think?

i see there are lots of electric box options and trying to figure out what type is best. whats the difference between a switch box and utility box and what one is allowed to be covered in drywall? also can an electric box have knockout clamps if covered by drywall? i am looking for an electric box thats metal, has internal nm clamps and can mount to a stud and at the same time can be up to 5 to 6 max gangs and low as one. some metal boxes have the screw hole outside the box as opposed to a utility boc where it is inside the box. are there long 6 gang boxes that mount to studs and have a plaster ring thats 5 to 6 gang? here is a link to what i am talking about except i want internal nm clamps and plaster ring: [url=http://www.lowes.com/pd_141545-427-687_0__?productId=3651798&Ntt=gang+box&pl=1¤tURL=%3FNtt%3Dgang%2Bbox%26page%3D2&facetInfo=]Shop Raco 63.5-cu in 4-Gang Metal New Work Wall Electrical Box at Lowes.com[/url]