In article ,
Philip Oldrosedene writes:
I wish to bring a remote CH motorized valve (Honeywell make) into
use. It wasn't connected when the CH was installed as the valve was
a last minute thought and no suitable cable was to hand. Up to now (8
years!) it has been left in the ON position.

Depending on route chosen, it will require 5 to 8m of cable to connect
to the main CH controller. The cable into the valve is 5 way x 0.8mm
sq (ie 1.0mm dia) - 4 control lines plus earth. The valve operates at
240V, so the cable needs to be rated for mains.

For preference I should like to use standard elec backing boxes to
house the connections at each end, and bury the cable run under the
wall plaster.

Please can anyone suggest a suitable cable & source?

I have something similar. I'm using 5 core flex, which at the time
was available in cut-it-yourself lengths from B&Q, but I don't think
they do it in cut-it-yourself lengths anymore. (Actually, ISTR that
I ended up with 6 core flex, as I think I had a spare core.) You
can use flex for fixed building wiring -- it's just not normally
done on grounds of cost and ease of handling.

At the actuator, I made up a suitable socket. I use the Bulgin
8 pin mains connector (often used for disco lighting). A panel
mounted socket is cut into a standard blanking plate, which is
wall mounted onto a flush back box, and the plug attached to
the end of the actuator flex. Make sure the design of the heating
is such that if the actuator is unplugged, nothing nasty can
happen (e.g. boiler won't try to fire up with no flow through it).

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]