W
woodhai
Looking for help.
I had a look at a friends flat, he said the walls in his flat were live when he put a Pen type voltage indictaor to the wall. This was after there had been a flood in the flat next door and his walls are soaked, literally. Sure enough the Pen stick did light up but I tested with a fluke and got 34 volts. He showed me an old JB in the kitchen that must have been a socket some time or other but was now above the cooker. The capping on the cables was metal type, (shows how old this is). I measued full mains voltage from the metal capping to earth, this being the bolt head on another socket. I meggered the circuit and found it flat to earth. We chased the wall to remove the capping and cables as the socket is not required, guess what we found, first a hole in the middle which had parted the twin and earths but not punctured them then further up bingo, a nail, through the outer insulation and into the live conductor. The RCD must be knackered as this must have been like this for years, this will be replaced when I fit a new CU.
With regard to earthing, the supply company do not supply an earth connection as the supply comes in from overhead. What is the best option, would it be to put in 2 earth rods in the floor in his shop down stairs, I know his gas supply has just been replaced with a plastic pipe but not sure about his water pipe. What sort of reading is acceptable?
Thanks in advance Ian
Read more: http://www.electriciansforums.net/e...earth-electrode-resistance.html#ixzz2JUXyoK6u
I had a look at a friends flat, he said the walls in his flat were live when he put a Pen type voltage indictaor to the wall. This was after there had been a flood in the flat next door and his walls are soaked, literally. Sure enough the Pen stick did light up but I tested with a fluke and got 34 volts. He showed me an old JB in the kitchen that must have been a socket some time or other but was now above the cooker. The capping on the cables was metal type, (shows how old this is). I measued full mains voltage from the metal capping to earth, this being the bolt head on another socket. I meggered the circuit and found it flat to earth. We chased the wall to remove the capping and cables as the socket is not required, guess what we found, first a hole in the middle which had parted the twin and earths but not punctured them then further up bingo, a nail, through the outer insulation and into the live conductor. The RCD must be knackered as this must have been like this for years, this will be replaced when I fit a new CU.
With regard to earthing, the supply company do not supply an earth connection as the supply comes in from overhead. What is the best option, would it be to put in 2 earth rods in the floor in his shop down stairs, I know his gas supply has just been replaced with a plastic pipe but not sure about his water pipe. What sort of reading is acceptable?
Thanks in advance Ian
Read more: http://www.electriciansforums.net/e...earth-electrode-resistance.html#ixzz2JUXyoK6u
