On Wed, 23 Jan 2008 07:41:02 -0000, Autolycus wrote:

The (gas) boiler is around 8ft from the area where all the control
wiring is to be brought together, in a different room.

The supply to its ...

The boiler?

... fcu will be surface-run behind some fixed furniture, then in
trunking for the last 4ft to the boiler, and will be in 2.5 t&e.

If so the boiler does not need a FCU as the *whole* CH/HW control system
will have a requirement to a single mains feed from DP switched (to
provide proper isolation for maintenance, a SP fuse or an MCB is not
suffcient) fused at 3A connection unit. Look at the ratings for
thermostats, motorised valves, programmers etc as well for the 3A
requirement.

All the boiler needs is a flex outlet, so run the T&E from the wiring
centre to the flex outlet adjacent to the boiler and flex from there into
the boiler.

--
Cheers
Dave. pam is missing e-mail