something weird happens in my house. I switched off the main circuit breaker for the house in order to change some light sockets and surprise - when i double checked with AC voltage tester I got positive on the light bulb socket. Not only that, I tried few more places - the tester detects power everywhere, but not only on the hot wires - the neutral ones started to trigger my tester too (before switching the breaker off, and after switching it on again i got power only from the hot wires only). I know the tester is good, as i have small diode indicator on the light switches and they are still working after turning off the main breaker. No lights or electric appliance worked tho, so i think it's some low voltage current flowing. So it seems when my main breaker is off - not only the power is still on, but it's flowing in the neutral wires too. What could be the problem?
Update: Every reading was measured also with phase meter and multi-meter with the same results.