I have come across exposed conductors in an underground EMT 1-1/4" conduit. They feed apartments in a condo complex. When I check with a non contact tester or a tic tracer I am not getting a reading although I am almost certain that they are hot. Could the false negative reading be due to the fact that there is water in the conduit. Anyone run into this before. The insulation is THW and they look like #4 AWG.