Date   : Tue, 08 Sep 2009 09:36:27 +0100
From   : rs423@... (Mick Champion)
Subject: Leccy @ Acorn World '09

Phil Blundell wrote:
> On Sun, 2009-09-06 at 19:30 +0100, Jonathan Graham Harston wrote:
>   
>> Also, with rings you can have as
>> many outlets as you want, with a radial you may only have a maximum
>> of three outlets. 
>>     
>
> Where do you get that from?  I don't think anything in the regulations
> imposes such a limit (and indeed the example radial circuit shown in
> Appendix 15 depicts twelve outlets).  There's a note that "as a rule of
> thumb, the floor area served has been limited to 50m^2", but even this
> is not mandatory so long as the expected load is within the circuit's
> capacity.
>
> Incidentally, appendix 15 also shows a 20A protective device for a
> circuit wired in 2.5mm.  I don't have an up-to-date copy of the OSG here
> to look at, but it seems a bit odd that it would require only a 16A
> breaker for the same circuit.
>
> The IET also have some discussion of the relative merits and evils of
> ring circuits on their website, see:
>
> http://www.theiet.org/publishing/wiring-regulations/ringcir.cfm
>
> p.
>
>   

Many thanks for the above link. This will be a good read.



Mick.