Hi All
I have a relatively modern Wylex CU Which has (amongst other stuff) 6 MCBs protected by an RCD.
I was checking out the topology of one of the circuits today (It has 2x 2.5mm T&E at the CU, but most of the sockets only have 1 T&E, so I wanted to check whether it was a ring, or two radials (or a broken ring) wired into the one MCB (I found if I connected either leg then all the sockets were live, so it APPEARS it is some sort of ring (perhaps with JBs below the floor and a short T&E up to each socket).
Anyways onto what I found to be unusual behaviour....
Whenever I switched this MCB off or on the Power on the adjacent MCB appeared to be interrupted for a very short period (1/10 second??). And then it would resume as if nothing happened.
Any ideas if this is to be expected and/or why it might happen?
TIA
Chris