On Sun, 15 Mar 2009 23:30:33 +0000, Dave Osborne
wrote:

There is no general requirement that you have to bring an electrical
installation up to the current regulations, however, there are
circumstances in which you have some obligation to improve your
installation.

In particular, if you renew your consumer unit, you have to do so in
compliance with the latest version of the regualtions and at the same
time ensure that your main equipotential bonding is up to scratch.

Thanks for the informative post. So it would appear that though other
aspects of the installation need not be upgraded, you must always
upgrade CUs to the latest regs?

Can only the electricity company upgrade the earth connection from the
CU to the meter?

How do split load CUs fit in with the 17th edition?
They're pretty much de-rigueur.

I was thinking of the old split-load with one half without a RCD but
if I have to go 17th ed, these are now out of the question (so why are
they still being sold?)

I suggest you consider http://www.tlc-direct.co.uk for your electrical
supplies.

I am already a happy TLC customer

Thanks,
Stephen.