Re: Query on wiring and Cbus

["the_home_automator <db@xxxxxxx>" <db@xxxxxxx>]

yes but, the underlying question here is "is c-bus control really
SELV"?  Being SELV is more than just running < 120v dc (50v ac),
regs
411-02.  (and I dont know if the answer is yes or no)

David

>
> Extract from c-bus technical:
>
> What is the position re using Clipsal switches in a bathroom - does
it
> comply with IEE regs (BS7671) ?? C-bus operates SELV which
according to
> the regs you could install a c-bus switch in the bathroom, however
if
> you are NICEIC/ECA registered they will fail your installation.
It's one
> of these grey areas which in time will resolve it self by
understanding
> and the number systems being installed.
>
> HTH
>
> Rob
>
>
> -----Original Message-----
> From: Des Gibbons [mailto:des@xxxxxxx...]
> Sent: 01 March 2003 19:49
> To: Ukha_D@Yahoogroups. Com
> Subject: [ukha_d] Query on wiring and Cbus
>
>
> Hi,
>
>
> OK, I have been tracing the cable routes from the consumer unit to
the
> 1st floor void and attic with the intention of home running power
feeds
> back to the consumer unit for each light fitting to connect to some
cbus
> dimmers.
>
>
> Then I had a thought, power is already run to each area in the form
of 2
> x 1mm t&e cables, so if I place the cbus units on the first floor,
and
> in the attic, I will dramaticlly reduce the amount of homerun
cabling I
> need to do.
>
> So assuming the 2 x 1mm T&E will provide enough juice to power the
cbus
> dimmer, and the light fittings on each floor, can anyone see any
> problems doing it this way? (If the 2 x 1mm T&E aren't enough, I
can
> always run 1 or 2 2.5mm T&E easily)
>
> All the switches are being homeruun to a different location anyway,
so
> it is only the power cables to each fitting.
>
> Oh, and do the wiring regs say anything about doing it this way?
>
> Cheers, Des.
>
>
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