Cut a long story short I replaced a weeping tee piece in the cold water pipe at the weekend and as I tidying up got a tingle from the copper pipework when touching the damp concrete.
Measured the voltage (potential difference to earth (the damp patch)) at it was circa 9v DC
Switched off each circuit at the consumer unit one by on but very little to no change on each circuit.
Following day (raining) the voltage was only 1.5v DC but investigated anyway. Cleaned the earth clamps (3x) and tested but still the same, 1.5v.
Cleaned the earthing rod contacts outside only to find the 4' copper plated rod corroded down to a measly 150mm in the ground and wasn't solid in the ground.
Brayed a 3' 15mm copper pipe into the ground and connected up the earth.
Voltage on internal pipework to the "wet patch" is now .5v DC(half a volt)
Should I be worried about the potential difference to ground?
Am I wasting electricity?
What could be causing it?
Why doesn't it trip the consumer unit?
Measured the voltage (potential difference to earth (the damp patch)) at it was circa 9v DC
Switched off each circuit at the consumer unit one by on but very little to no change on each circuit.
Following day (raining) the voltage was only 1.5v DC but investigated anyway. Cleaned the earth clamps (3x) and tested but still the same, 1.5v.
Cleaned the earthing rod contacts outside only to find the 4' copper plated rod corroded down to a measly 150mm in the ground and wasn't solid in the ground.
Brayed a 3' 15mm copper pipe into the ground and connected up the earth.
Voltage on internal pipework to the "wet patch" is now .5v DC(half a volt)
Should I be worried about the potential difference to ground?
Am I wasting electricity?
What could be causing it?
Why doesn't it trip the consumer unit?