"charles" wrote in message
...

And the words being "can open" are important. More houses manage a
fusebox to CU swap without major problems than do have major problems.
Most houses built in the 80s had fuse boxes and their electrical
installations are fine.

I moved into this house in 1977 and one of my first projects was to change
the CU to one with RCDs.


That would have been unusual in 1977. TT supply?

--
Adam