Mary Fisher wrote:

"Geoff Berrow" wrote in message
...
I've just bought a house which was built in 1965.
At what point does a rewire become necessary?

When it's a) illegal (which yours might be)

Why would an existing installation be illegal?

or b) before it's dangerous.

Yes. To the OP, the usual signs are insulation starting to perish or
split. This can be seen if you take off a few sockets to see the state
of the insulation. If it looks perished, or dry, then it is time to
rewire.
My parents house is 42yo, they had a sparky round who did various tests
on the wiring, and told them there was no real need to get it rewired,
as it was fine, though it would benefit from a new consumer unit and
relevant RCD protection for different circuits. In the end, they left it
as is.
Alan.
--
To reply by e-mail, change the ' + ' to 'plus'.