I have RCCB/RCD with four circuit breakers at the entrance of my aparment (I am actually not quite sure how it is called in english, so here is RCCD and CB is ABB s231r with different max amps)
Recently, I've been setting up electrical socket in the kitchen, so I turned off cb, that handling kitchen line and installed socket. During this process from time to time I've been double checking on line voltage (with
N and with
PE) with multimeter (just in case) and couple of times during this process my RCCB triggered. What can cause this behaviour? As I know, RCCB only triggers when there are differential current in the circuit, so if every properly working circuit have some small amount of differential current by design, if I disable one of the lines with CB this differential current should decrease?