On Tue, 12 Dec 2006 11:20:13 +0000, The Natural Philosopher
wrote:

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..

I mean the switches in place of the fuses of yore. My consumer unit
contains a whole row of them. Mostly black, some red.

MM