RE: Bathroom project - Cbus style lighting system....1 room only though!!

["Paul Gordon" <paul@xxxxxxxxxxxxxxxxxxxxx>]

I reckon it could be done a little cheaper....

As Ben already said, you'd need EITHER the touchscreen OR the PAC, but not
=
both, - either of these units contains the logic engine necessary to do
the=
"smarts"

I'd further guess that the "6 small downlights" don't need to be
individual=
ly controlled? - if they are to be all switched/dimmed together then
(curre=
nt rating permitting) they could all go on a single CBUS channel, and thus
=
only a 4-channel dimmer would be sufficient... - in fact, this would still
=
allow some separation of the light fittings onto different channels, - say
=
3 groups of 2 lights, which would still leave a channel free for something
=
else...

The PIR doesn't necessarily *have* to be a CBUS one... - the range of
choic=
e of CBUS PIRs is pretty limited, and if you wanted to have more than one
i=
t starts getting very expensive... - I reckon you *could* use a bus
coupler=
(which IIRC is about =A360-70), and to that you could connect any bog-stan=
dard NO (Normally Open) PIR. - the bus coupler would even allow you to
conn=
ect up to 4 PIRs in this way to give better coverage of the room and thus
b=
etter response to occupancy... - You'd need to sort out the 12V power to
su=
ch PIRs yourself though.

I'd guess the Saturn (which would be my choice too!) could also be
downrate=
d to a 4-button rather than a 6, reducing the costs just a little more...

The other thing worth mentioning of course, is that switch in the room
only=
uses the 30V CBUS power, - no mains, - so can go inside the bathroom...

HTH

Paul G.

-----Original Message-----
From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of b=
en addison
Sent: 28 September 2008 12:54
To: UKHA Group
Subject: RE: [ukha_d] Bathroom project - Cbus style lighting system....1
ro=
om only though!!

Hi Noel,

=20

You could install a c-bus system for around =A31000.00 plus labour.

=20

You would need;

New B&W touch screen in logic =A3670.00

8 channel dimmer                     =A3420.00=20

PIR                                          =A390.00

6 gang Saturn                           =A3140.00

PAC                                        =A3360.00

=20

If you use the touch screen with logic, you will gain an extra switch and
will not need the PAC

=20

Cost then will be =A31320.00

=20

HTH

=20

=20

=20

Ben Addison

Ben Addison Ltd (electrical Contractors)

07889845712

www.benaddison.com

_____=20=20

From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
noel_pilot
Sent: 28 September 2008 12:24
To: ukha_d@xxxxxxx
Subject: [ukha_d] Bathroom project - Cbus style lighting system....1 room
only though!!

=20

Hi all,=20

I've just started an intermediate DIY course at the local college
(wanted to know how to plaster so I can start chasing cables etc) and
I'm planning my first big project...my bathroom.

Plan to completely redo and obviously HA has to play a part.

I'm in a 2 bed mid terraced new build (2001) house so I'm not about to
put in thousands of =A3's worth of lighting for such a small house but I
would like to see what I can do at reasonable (!!) cost.

I remember reading way back about someone who had a lighting setup
whereby they have occupancy detection so lights come on automatically
but with intelligence, i.e. if its 0200 only turn the landing/bathroom
lights on to 15% or so so as not to blind you in your sleepy state!!

I love this idea and would love to be able to replicate it for this
project.

I can't remember who or what system that was (feel free to pipe up :)
) but could this be achieved through cbus alone without requiring
other systems to be on 24/7 controlling the logic?

For such a small scale is there anything else out there that could do
this? all I have upstairs is two bedrooms and the bathroom, one
bedroom is for a lodger and i'm not overly fussed by lighting
automation in my room, altho motion activated lights when I walk in
would be quite cool!!

I have a large loft above so could put power packs etc up there
without too many issues although I'm obviously going to need to have a
new electric supply run to the loft.

Being a bathroom I'm aware I'm running into Part P, am I correct in
understanding that work can be done by anyone but it has to be signed
off by a Part P electrician?

Lighting plan is for six small downlight/spots in the ceiling, at
present its just a normal bathroom, single central ceiling light on a
string pull switch that also turns on the extractor fan.

Plan to retain the fan albeit a different bezel and also add heated
mirror pads to prevent steaming of the mirror.

A 'cool' switch/touchpad/screen to activate the lights probably
located outside of the bathroom would also be a bonus!!

I'm in the very early thought stages of this and more posts will I'm
sure come over the coming months (I will of course take pics when I do
the job) but any thoughts re the lighting would be greatfully
appreciated at this point.

For those far more experienced in cbus could anyone just give me a
guide price of what I'd need to put in the dimmer packs needed and say
a saturn switch for just the bathroom maybe with expansion capability
to cover one bedroom?

Cheers all and sorry for the long post!!

Noel

=20



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