We have been busy the last week getting power restored to people in northern new jersey. I have a couple of homes with damage to the panel buss because the panels were energized. we are just going to replace them. Today we went to a commercial property with a 1200 amp 3 phase switch gear where the feeders lands on lugs at the end of the buss. The service was hot under water and now have white corrosion on them. the buss has rust and obvious signs that it was under water. I am no engineer so what is the typical course of action in dealing with this issue??
What I'd be more concerned about is not the lugs themselves, but the wires connected to them. Having water get into any sort of wiring where it is terminated at a lug (or whatever), can cause water to move up under the cable insulation (by capillary effect), this can then cause a failure later on as the wire corrodes from the inside out.
I myself would be rather hesitant in re-connecting anything that has been submerged, without a VERY good megger and continuity test being done on the the whole place. Let alone certify it as safe. Be very careful here, it could come back to bite you in the britches.
Mike: I share your opinion. Wiring that is submerged, or been subject to 'water damage' has to be replaced. The effects of corrosion or other internal damage cannot be 'seen' and will rear its head eventually.
I didn't mention anything regarding the conductors to the OP, as he only seemed to have concerns about the gear. Perhaps a 'bad' on my part?
There are some companies out there who will take the time and try to clean out all of the service gear to see if it is fit to re-use. As long as I get a letter from them stating that it is OK to turn back on, that letter goes into the file for reference.