Hi Guys, a quiery for you, ( by the way I live in Western Australia) I was doing some work at the house today and was disconnecting some sockets for renovations, so i isolated the circuit but had to cut the T&E to get it out at the other end. Now the thing is that I have 3 phase incoming red phase protected by DP RCD, White(Yellow)phase the same and blue phase non protected circuits, each rcd protected phase has a mixture of power and lighting(thats the regs over here)
So when I cut the T&E I was expecting the white phase RCD to trip out but it didn't so i stripped it back and touched N and E together but no trip. I put a socket back on and plugged in my Robin digital RCD tester and did the x1/2 test which didn't trip(correct) then x1 at 30mA and tripped at 18mS at 0 degrees and 9mS at 180 degrees.
I've been sparkying for 22 years and have always believed N and E shorted out will trip an RCD, correct me if i'm wrong but can anyone shed some light on this.
The type of earthing arrangement over here is (crap) TPandN supplied by service provider then the spark installs an earth rod with a 6mm from that to the earth bar then an MEN link from earth bar to N bar.
Thanks
So when I cut the T&E I was expecting the white phase RCD to trip out but it didn't so i stripped it back and touched N and E together but no trip. I put a socket back on and plugged in my Robin digital RCD tester and did the x1/2 test which didn't trip(correct) then x1 at 30mA and tripped at 18mS at 0 degrees and 9mS at 180 degrees.
I've been sparkying for 22 years and have always believed N and E shorted out will trip an RCD, correct me if i'm wrong but can anyone shed some light on this.
The type of earthing arrangement over here is (crap) TPandN supplied by service provider then the spark installs an earth rod with a 6mm from that to the earth bar then an MEN link from earth bar to N bar.
Thanks