Leakage Voltage

[EddieB]

Guys
I was tracing a fault out in the garden of a client today and came across a set of driveway drive over lights, This isn't the LED type but a replacable GU10 lamp. I noticed that one of the Stainless covers was loose and found that it had come adrift from the fitting letting moisture onto the lamp and causing it to blow, as I touched the relector I felt a tingling in the fingers, I tested from the reflector to earth and got a reading of 65v, surely the RCD which protects this circuit should have tripped. I tested the RCd and it performed within the expected parameters, any ideas?

 

[Marvo]

If the reading of 65 volts was from a digital tester then it doesn't mean much. If you do the same test with an analogue tester which has far lower input resistance you'll get a much lower reading.

Is the light circuit definitely supplied by the RCD? If it is them it might be worth retesting the device a few times. The other possibility is you got a tingling between live and neutral rather than live and earth.