M
mattpolhill
Hi all.
Changed a board the other day and the RCD's not tripping on test.Changed the RCD and still not tripping.Did a ramp test and still no luck.Tested the RCBO's and they don't trip either. There's no MET at the incoming supply just a 10mm earth bond going down into the wall, so has to be a TT system .Ze was 56 ohms. Any ideas?
Changed a board the other day and the RCD's not tripping on test.Changed the RCD and still not tripping.Did a ramp test and still no luck.Tested the RCBO's and they don't trip either. There's no MET at the incoming supply just a 10mm earth bond going down into the wall, so has to be a TT system .Ze was 56 ohms. Any ideas?