We have a problem with a possible fault on a ring main.
We think there is a live to earth fault somewhere under the floor. It has been difficult to trace as it is intermittent and we don't have full access only to the sockets. We did trace the fault to a cable with an insulatoin resistance tester at 500v and then it later dissapeared.
The system is TT and the earth stake was passing 20 amps under fault which would not blow the 32amp breaker......
The two Rcd are Protec and are now faulty after a recent electrical storm and wont trip under test. or under the fault condition.
There are two new rcd,s on order and talk of a surge protector to stop the rcds going down again. We hope to further track fault when it re -appears.
Any ideas regarding surge protection and this intermittent fault we think might be a stray conductor from mice/water intrusion?
Thanks chaps
Jason
We think there is a live to earth fault somewhere under the floor. It has been difficult to trace as it is intermittent and we don't have full access only to the sockets. We did trace the fault to a cable with an insulatoin resistance tester at 500v and then it later dissapeared.
The system is TT and the earth stake was passing 20 amps under fault which would not blow the 32amp breaker......
The two Rcd are Protec and are now faulty after a recent electrical storm and wont trip under test. or under the fault condition.
There are two new rcd,s on order and talk of a surge protector to stop the rcds going down again. We hope to further track fault when it re -appears.
Any ideas regarding surge protection and this intermittent fault we think might be a stray conductor from mice/water intrusion?
Thanks chaps
Jason