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The sockets are all fine but the house is of an age when JB's used and hidden in voids. Repaired one such issue following lighting circuit failure a few years ago. The issue I have is that this tripping at 1/2 can be prompted by either of 2 final ring circuits but only one seems to stop...

My Fluke has no ramp tester but tripping 30mA x1/2 assumes 15mA is causing trip but at sockets only

Thanks for replies. As per regs, RCD tested at cu with loads disconnected. Curiosity( after finding shorts in garden lights connected to 1 of the final rings in house) led me to test RCD from a remote location and this is when I found rcd tripping at x 1/2 regardless of where (or how near) to...

Hi All Not come across this before but general nuisance tripping on RCD trip investigation ( TT with 30mA main switch). Normal results at origin with no loads but  tripping at x 1/2 current at sockets with variation depending on circuit. New kitchen ring causing x 1/2 trip but no evidence of...

Hi just a quickie.. Does the regulation regarding only one unfused spur from an existing socket apply when the socket being spurred from is supplied from a junction box spur on a final ring circuit? cheers