X10 Retrofit ?

["Marcus Warrington" <marcusw@xxxxxxxxxxx>]

I'm just starting to retrofit our house with X10 (after 1.5 years of
procrastinating!)
Since the house was rewired 3 years ago in the conventional ring circuit
style, I'm thinking
of placing a separate consumer box on each floor of the house to run X10
DIN modules for all
the lights on each floor (4 floors in total ..cellar/ground/upper/Attics).
Since lights
are already fed on a ring circuit I'm thinking that I can simply run a 2
core cable from the
ceiling rose (Live/Neutral)of one light on each floor back to the consumer
unit to power the
X10 DIN modules in each consumer box. Then run a single 2 core (switch)
cable from each DIN
module to each ceiling rose and "highjack" the switched return
wire and redirect it to the DIN
module. i.e. the current switched (live) return wire would be joined to the
new wire going to
X10 switch input terminal, and the return wire from the X10 switched output
would be joined to
the light where the current switched live is connected. Doing it this way
would mean a fairly
easy conversion i.e. feed one 2 core wire from each ceiling rose to
consumer unit and replace
light switches. It also means I could revert back to a normal non X10
switch very easily if I
ever sell the house (just move rewire ceiling rose and replace wall
switch).

Current wiring

----*--------------- N (ring)...
---------*--------- L (ring)...

`------------------------[ Switch ]----.

.-------------------------------------'
\    /
\  /
\/
##
(::) <-bulb
`'


Proposed X10 retrofit

.-----------------------------------------------------.
.----------------------------------------------.

----*-------------- N (ring)...
---------*--------- L (ring)...
Momentary
`------------------------[ Switch  ]---.         <-- only from one light
per ring
.---.   .-----------------------------'
\    /
\  /        ` -----------------------------.
\/      `------------------------------.
##               .-------. .-------. .-------.
(::) <-bulb        L^  2   L^  2   L^  2
`'
LD11    LD11    LD11

L   N   L   N   L   N
`-------' `-------' `-------'
`-------^--------^-------'
`---------^--------^---------'


Is this OK? Is there any problem with effectively feeding the power for the
consumer unit via
a spur from the lighting circuit ?


Marcus