EICR Testing with 2 way Radios & RCBOs

[ForkEnigma]

Currently doing testing on an old building, with concrete walls everywhere, circuit finder dosnt work.
So using 2 way Radios, but they are opening the Protective RCBOs!

Using Motorla, has anybody else had this issue? Does anybody know of a 2 way Radio that will not open the RCBO?

Tia

 

[ForkEnigma]

The way I,ve done it is connect load like fan htr at end of cct,switched on/off,then clamp mcb,s/rcbos till circuit is found.
Regards,S

Yes that did cross my mind.
All boards located near to circuit have been tested now. Still cannot find it! Probably in an old cupboard or in the ceiling somewhere.
Been agreed with client to do out of hours, and shut down.
Thank you