Today I found in the unfinished basement, some water drops on the floor. They came from a conduit running the ceiling of the basement. There is a 'junction' type of conduit with two screws in it and then the conduit pipe runs up into the 1st floor. This is a ranch home. There is a little bit of a substance on the one screw. I took the screw out, and no water came out of the hole, but there was still a drop or two on the area where the conduit and this fitting came together. We have been here six years- new home-1st owners. Never saw this beore. Checked all the other 'fitting' on the conduit- no leaks.
SW of Chicago- wind chills in minus 30 to minus 50 the last 36-48 hours. Major concern? See what happens when temps normalize? Call an electrician?

Major concern?

No, conduit and electrical boxes are not air tight, therefore condensation will occur.

Harold is right, particularly in a basement with higher humidity and then a cold front comes through and condenses water in the conduit. Remove the connectors and let the conduit dry out, should be OK.