once at work i hat opened the breaker of a receptacle line for servicing. with the small neon screwdriver tester, i could see no difference between breaker on and breaker off. measuring with a tester with coil to montior the voltage then showed me the line was off.
Background: The cable was running in a troughing with several others. as both ends of the phase conductor were unconnected, the wire collected the field fromt he others...
