No risk that anybody will bypass it, the weakness is the combination of an early version of the units and the old-fashioned system together with great capacitive "feedback" from the wires in steel tubing in the walls.
A less than 100 mA fault made around 15 of these elements to trip at the same time. Those are rated to trip at max 30 mA we have tested (all of) them to trip between 12 and 15 mA.
Only units of this make are tripping in these cases. I have been told that thees are lo-cost but approved.
I have been told that this supply-system was abandoned in the UK in 1948.
Last edited by dsk; 09/26/2204:39 AM. Reason: adding text
