MM wrote:
Sometimes when a bulb blows (ceiling light) it causes the ELCB for the
circuit to trip. That is, if the bulb is in one of the upstairs rooms,
only the upstairs lighting ELCB is tripped. The power points are
unaffected, as are the power points and lighting circuits downstairs.

Is this just because modern wiring is so much more "safe" than once
was the case? This house was built in 2004.

MM

I suspect you don't mean earth leakage trips..its uncommon to have those
on lighting circuits alone..

Yes, its very common for bulbs to trip a standard MCB.. as they arc on
failure and draw quite large currents before burning out. Mine do it
every time..I s'pose I could replace then with slower acting ones..but I
can't be arsed..

RCD's can also trip if they are marginal, and there is a lot
ofcapaicatbce between live or neutral and ground..