Discuss RCD Issue, Tripping at half Limit... in the Electrical Forum area at ElectriciansForums.net

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Hi All

I have just done a board change at a house that i'm sure is a TT System. (The House is supplied by overhead cable to the house with an earth rod net to where the external meter is fitted).

Once I had changed the board, I did a ZE Reading and GOt 5.63 Ohms. When testing the 30mA RCDs on the board it was tripping on half limit.

Has anyone experienced this with a TT System??
 
Had an RCD go down on a customer this morning. One ring final circuit with every thing on it kitchen, front room, hallway and backroom. I split the circuit in two and found the fault in the kitchen. Line to earth fault which took 3 hrs to find.
 

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