"AL_n" wrote in message
...
"ARW" wrote in
:

Let's start off with the main bonding - the first thing to be checked
before starting a shower installation (or indeed a shower swap)

The house's copper gas supply pipe is bonded at the consumer unit. The
internal copper water pipes are bonded at the boiler which was recently
installed by British Gas engineers. The water pipe to the shower will be
plastic. It appears to be a TN-CS electric supply which installed in 1991.
I've nerver experienced any issues with the mains circuit.


Is 1991 also the year the house was built?

--
Adam

"ARW" wrote in
:

The house's copper gas supply pipe is bonded at the consumer unit.
The internal copper water pipes are bonded at the boiler which was
recently installed by British Gas engineers. The water pipe to the
shower will be plastic. It appears to be a TN-CS electric supply
which installed in 1991. I've nerver experienced any issues with the
mains circuit.


Is 1991 also the year the house was built?

A large extension was built onto the older part of the building, and the
extension, which contains the CU was wired at that time. The older,
original part of the house was probably rewired at the same time, because
all the wiring throughout is white-covered T&E with red and black inners.

Al

"AL_n" wrote in
:

Is 1991 also the year the house was built?

A large extension was built onto the older part of the building, and
the extension, which contains the CU was wired at that time. The
older, original part of the house was probably rewired at the same
time, because all the wiring throughout is white-covered T&E with red
and black inners.

Al

What he said..

Jim

On 23/06/2015 13:00, Dave Plowman (News) wrote:

Plain copper PVC imperial was around. I've seen it.

Yes, you're right. I dug out an old copy of BS 2004:1961, amended 1963
& '65, price 10/- ! In the introductory notes it's clear that from 1955
tinning was the preferred standard, with plain copper permissible if
specified by the purchaser. By the 60s that was the other was round -
plain annealed copper as the default, with options for (i) aluminium
(sizes 7/.064[*] and smaller not acceptable for installations subject
to the IEE regs) and (ii) plain or tinned hard-drawn copper.

There was also stranded metric 2.5mm - made IIRC in singles for conduit
use. But may have been made as a special in TW&E for say a particular
council - they could have odd ideas.

Those variations are all permitted in BS 6004, so are not non-standard,
just less common :~). Stranded 2.5 singles are quite common - much
easier to pull-in thro' twisty or crowded conduit runs.

And it's not expensive to have special cable made provided you order enough.

Where "enough" is an MOQ of th order of 5 or 10 km, IME. That's a lot
of DIY wiring...

[*] 7/.064 was the standard size for domestic meter tails in those days.

--
Andy