wrote in message
oups.com...

Although very large older houses may have
two lighting rings, smaller (even 4/5 bed) houses of that period as well
as
flats tend to lose all lighting when the trip goes.

And yes I'm British.

trip?? Youre talking about 15th edn RCDs now?

I was referring to anything that breaks the supply.


Old installs sure didnt
have any trips, other than ELCBs on TT setups which almost never
nuisance trip. Need to distinguish between the 2.

We were talking about 70/80s housing or houses rewired in that period. What
period did 15th edition cover ?