How To Install A Doorbell Transformer Uk

Hi All,
I would like to install a doorbell transformer in my consumer unit to power a door chime. I've never taken the front of a CU before, and would like some advice as to whether this is a feasible plan for a DIYer.

As I empathise information technology, what I would need to practise is:
Disable the power to the CU past turning off the master switch on the unit.
Remove front end of CU.
Install transformer and connect wires to door chinkle unit of measurement.
Replace embrace on unit.

My main questions are:
Is this a safe and straightforward job for a DIYer?
Would whatever Wylex doorbell transformer be likely to fit my Wylex CU, or would at that place exist unlike types?
What type of wire would I need to use between the transformer and the door chime unit? - the transformer outputs 8V.
I assume that a doorbell transformer volition output a DC electric current - in which case am I right in thinking that both + and - terminals volition be located on the transformer itself rather than using a common negative supply in the CU?
Is there anything else I should be aware of?

Many thanks for whatever advice
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If you lot've never worked in a CU before, I would generally suggest this is not a job for you. If you do decide to become ahead with it though, then some points:
* Turning off the main switch still leaves the tails that feed it live, so be careful as those terminals (and any exposed copper if they oasis't been fitted properly) volition be live.
* Make certain you supply your transformer from a suitable circuit breaker (eastward.g. a lighting circuit) - don't simply supply information technology from the bus bar, as at that point there is no overcurrent protection for it. You may take to cut the passenger vehicle bar, if a full one has been installed all the way across. It's possible the transformer will have it'south own overcurrent protection or like, I've never used one, so check the manufacturer's instructions.
* Take the feed to your bong from the output of the transformer only - it is well-nigh likely a DC supply (but even if it's Ac), it volition accept it's own 2 terminals, don't try and employ the master neutral bar.
* If yous decide to install a new MCB for this transformer, and so note that that would be notifiable nether Part P of the edifice regulations, as information technology'due south a new final circuit. I believe adding the transformer to an existing circuit would not exist (unless your CU is in a kitchen or other special location).
Hi Guys,
Many thanks for the advice, - given that I don't fully understand the replys (I was unaware that information technology would exist possible to supply this sort of transformer from another circuit breaker in the CU - I thought that all units within the CU would connect directly to the busbar) I think this is probably an indication that I should go out well alone and install a battery operated doorchime instead!

Cheers for the help!
Become one of these, no wiring needed and yous can take the chime unit into the garden if you are exterior or upstairs if y'all are upstairs. That'southward what I have
http://www.screwfix.com/prods/43524...me-Kit-50m;jsessionid=LMGRNKMDQJJ2UCSTHZOSFFY
1) Any cables inside you consumer unit must be rated for 230 volt even when they simply acquit 8 volt.
2) I would remember y'all will need to pay council their £100 plus fee under Part P to work inside a consumer unit.
3) Transformers are normally A.C. output.
4) It will exist considered equally SELV and should not connect in any way to the 230 depression voltage supply.
Every bit to failure affecting other items within the unit of measurement I would remember this is unlikely simply unlike the external units the in-built protective devices are ofttimes not accessible so whatever fault volition probable require whole unit alter. Safety feature to cease wrong size fuses being fitted.

I can see some advantages equally initial install but non every bit retro fit and I use radio linked chimes.
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Transformer mounted within the CU is tidy merely is definately not a DIY retro-fit task.
Fit a transformer exterior the CU and feed it 230 volts from 1 of the lighting excursion MCBs. That way if the MCB trips for some reason and de-powers the door bell you lot volition be enlightened as the lights volition not be working.

And practise not forget that the door bell push connects between transformer and the bell. NOT between transformer and 230 volt supply I have seen two such installations by people who thought the power to the transformer had to be switched by the bell push button.

Radio linked door bells work but are dependent on batteries and other wireless related "difficulties".
could y'all give me a link or information on where to get a wylex bell transformer.
I didn't remember they made them,

Thank you
Certainly, - this is the only identify I can find that seems to stock them:
http://www.tlc-direct.co.uk/Products/WYMTS8slash1.html
Friedland make a range of chimes with built in mains transformer. Platonic when a redundant wall low-cal was replaced past a door bell only that is a long story.
http://world wide web.friedland.co.uk/PDF/product/wired_chimes.pdf

and also divide transformers at the lesser of this page.
fantabulous.
Thanks very much
Only ever used DIN rail mountain transformers for bells once - in a small-scale block of flats, landlord explicitly wanted them supplied from his supply, was a good use of a completely stripped down hager CU!
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