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

[Kevin Hawkins <yahoogroupskh@xxxxxxxxxxxxxx>]

A diagram will help I think...

One thing you mustn't do is have a switched live and the output of your
dimmer both connected together to the light - as this will damage your
dimmer..

K

noel_pilot wrote:
> I've since realised it's much better to take the Live feed from the
> existing switch and run that through the PIR, timer and dimmer (also
> using it to power the PIR and timer) and pass back to the switched
> live on the light.
>
> Much simpler and more effective.  Can also just use Neutral from the
> light fitting to provide neutral to PIR and timer.
>
> Will post proper diagrams once completed, all being well!
>
> --- In ukha_d@xxxxxxx, "noel_pilot" <HA@...> wrote:
>
>> Hi all,
>> Just a few months later I'm actually in the process of completing
this
>> (with pics of course!)
>>
>> I've got all the kit and just trying to sort the wiring in my
head.
>> Want to be absolutely sure I've got this right! Have an
electrician
>> that will inspect afterwards but doing the rest myself.
>>
>> Might post diagrams later if needed but hopefully someone can help
>> based on the text for now.
>>
>> At the moment I have a light, a switch, an extractor fan and a
>> extractor fan isolation switch.  The light and the switch are
wired
>> through the extractor fan isolation switch, presumably to trigger
the
>> fan to come etc but also wired such as to allow the light to still
>> come on even when the fan is isolated to off.
>>
>> So I'm looking to create another circuit that will switch the
light on
>> from the PIR, timer and dimmer switch.
>>
>> I'm planning on tapping into the feed from the extractor fan
isolation
>> switch to the light and running the new circuit in parallel with
that
>> point, if I've got this right that means at night when the PIR is
>> triggered then the light will come on but without the fan coming
on,
>> the fan will only be triggered by the original light switch.
>>
>> So currently going to the light will be a Neutral (assumed to link
>> through a ceiling rose at the extractor fan switch to both the
>> previous and the next light in the lighting ring) and a switched
live
>> from the extractor fan isolation switch/light switch.
>>
>> Should I tap into that and use the neutral that's already there
and
>> just pass the switched live through the PIR, timer and dimmer,
then
>> completing the circuit when those are triggered or should I be
running
>> the same neutral that's coming into the PIR running that to the
point
>> where I tap into the light and completing the parallel circuit
with
>> the switched live out of my new circuit?  Or does it not matter?
>>
>> I'm thinking that the second option is the best and it simplifies
the
>> circuit a little bit.
>>
>> Can someone also clarify the implication of what happens if both
>> circuits are live at once?  I assume that the light switch will
allow
>> more 'current?' to run through as it won't have a dimmer switch in
the
>> circuit therefore the lights will come on full brightness but can
>> someone confirm there's no issue with having the circuit completed
>> twice as it were?
>>
>> I'm going to try and get hold of my electrician today to talk it
>> through also but I value the experience on here of things outside
the
>> norm so hope someone can confirm my thoughts and ideas!!
>>
>> Cheers all
>>
>> Noel
>>
>> --- In ukha_d@xxxxxxx, Neil Fuller <neil.fuller@> wrote:
>>
>>> Done off list
>>>
>>> noel_pilot wrote:
>>>
>>>> Thanks Neil, that URL doesn't work though, could you send
me your
>>>> original link? Thanks
>>>> Noel
>>>>
>>>> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>,
>>>>
> Neil
>
>>>> Fuller <neil.fuller@> wrote:
>>>>
>>>>> Noel
>>>>>
>>>>> What about a timer with volt free contacts.
>>>>>
>>>>> The timers clock would be powered from a permanent
power supply
>>>>>
>> and the
>>
>>>>> supply to the light fitting switched via the VFC.
>>>>>
>>>>> There's loads of them available and if you shop
around, you'll
>>>>>
> find
>
>>>>> something cheaper than this . . . .
>>>>>
>>>>> http://tinyurl.com/7w5t2l <http://tinyurl.com/7w5t2l>
>>>>>
>>>>> I've sent you a data sheet off list which details the
electrical
>>>>> connections.
>>>>>
>>>>> HTH
>>>>>
>>>>> Regards
>>>>>
>>>>> Neil
>>>>>
>>>>> noel_pilot wrote:
>>>>>
>>>>>> Hi Stephen,
>>>>>> Thanks for that, I think the power supply option
is going to
>>>>>>
>> be easier
>>
>>>>>> for me, i already have a 5A socket in the loft I
was using for
>>>>>>
>> a tv
>>
>>>>>> amplifier so can use that to simply run. Nice one
many thanks.
>>>>>>
>>>>>> Noel
>>>>>>
>>>>>> --- In ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
>>>>>>
>>>> <mailto:ukha_d%40yahoogroups.com>,
>>>>
>>>>>> Stephen McGarry <Selfbuild@> wrote:
>>>>>>
>>>>>>> power the PIR and timer in paralell the use
the output of
>>>>>>>
>> the PIR to
>>
>>>>>> activate a relay with the contacts in series after
>>>>>>
>>>>>>> the timer. Thus PIR stays powered and doesnt
do the 'turn on
>>>>>>>
>> thing'.
>>
>>>>>> Alternately use as small power supply to replace
>>>>>>
>>>>>>> the battery in the timer.
>>>>>>>
>>>>>>> HTH
>>>>>>> Stephen
>>>>>>>
>>>>>>> noel_pilot wrote:
>>>>>>>
>>>>>>>> Hi all,
>>>>>>>>
>>>>>>>> It's Christmas day, I've got a small stash
of money to let
>>>>>>>>
>> me get
>>
>>>>>>>> cracking on my bathroom so I'm looking to
order my stuff! :)
>>>>>>>>
>>>> this goes
>>>>
>>>>>>>> nicely with my chilled eve, wine and royle
family!!
>>>>>>>>
>>>>>>>> one question on this, ideally i'd put the
PIR before the
>>>>>>>>
> timer
>
>>>> that
>>>>
>>>>>>>> way the light wont turn on when the powers
supplied each
>>>>>>>>
>>>> evening as it
>>>>
>>>>>>>> would if the timer was in front of the
PIR.
>>>>>>>>
>>>>>>>> Only problem with this is that the timer
then doesn't
>>>>>>>>
> have any
>
>>>> power
>>>>
>>>>>>>> to it to power the timer!!! Now I know a
few have battery
>>>>>>>>
>>>> backup but
>>>>
>>>>>>>> this means that the timers going to be
running on battery
>>>>>>>>
>>>> backup near
>>>>
>>>>>>>> enough permanently! something like
>>>>>>>>
> http://tinyurl.com/a6xgze
>
>>>> <http://tinyurl.com/a6xgze>
>>>>
>>>>>> <http://tinyurl.com/a6xgze <http://tinyurl.com/a6xgze>>
>>>>>>
>>>>>>>> <http://tinyurl.com/a6xgze <http://tinyurl.com/a6xgze>
>>>>>>>>
>>>> <http://tinyurl.com/a6xgze <http://tinyurl.com/a6xgze>>>
the only
>>>>
>>>>>>>> time it would actually have mains power
would be during
>>>>>>>>
>> the brief
>>
>>>>>>>> periods that someone uses the bathroom
between 2200 and
>>>>>>>>
> 0600.
>
>>>>>>>> Has anyone used any mains timers
predominantly on battery
>>>>>>>>
>> backup??
>>
>>>>>>>> Some of the other timers on sites i've
looked at get slated,
>>>>>>>>
>>>> this one
>>>>
>>>>>>>> slightly less so than others.
>>>>>>>>
>>>>>>>> Any advice all??! Thanks
>>>>>>>>
>>>>>>>> Noel
>>>>>>>> Happy Christmas,
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>
>>>>
>
>
>
>
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