Callout today - "sockets keep tripping"
TN-C-S. twin split load CU. 4 bed detached (with cellar & garage)
total no of MCB`s - 3!!!
2 of them are lighting (30mA RCD protects)
other is a 32A MCB via 30mA RCD - All sockets in house on 1 ring!!!!!!
EVERYTHING disconnected (trust me guys!)
Phase - earth reading of 70K ohms!
Eventually found an outside wall where back boxes are rusted, and copper is green
Take face plate off. FACE PLATE is reading 700K P-E while not attached to ANYTHING.
Could the moisture have got at the cable? N-E is good, which suggests not, but I can`t think of anything that would cause a leak of that size (it stays approx the same at 250, 500 or 1KV!)
Any input appreciated....
KME
TN-C-S. twin split load CU. 4 bed detached (with cellar & garage)
total no of MCB`s - 3!!!
2 of them are lighting (30mA RCD protects)
other is a 32A MCB via 30mA RCD - All sockets in house on 1 ring!!!!!!
EVERYTHING disconnected (trust me guys!)
Phase - earth reading of 70K ohms!
Eventually found an outside wall where back boxes are rusted, and copper is green
Take face plate off. FACE PLATE is reading 700K P-E while not attached to ANYTHING.
Could the moisture have got at the cable? N-E is good, which suggests not, but I can`t think of anything that would cause a leak of that size (it stays approx the same at 250, 500 or 1KV!)
Any input appreciated....
KME