Anthony R. Gold wrote:

I am disappointed that my remark about plug fuses being needed in the UK
because of the use ring mains in the UK has turned into arguments over
whether any particular architecture is superior or unfit for purpose.

I was not arguing that one architecture is superior to another (I
believe there are pros and cons to both circuit types and one needs to
chose which to use based on circumstance). However I was questioning
your assertion that fuses are required *because* of the use of ring
circuits.

I was highlighting that the requirement for the fuse is nothing to do
with the circuit architecture. A 32A radial wired in 4mm^2 T&E would
also require fused plugs for exactly the same reasons.

The crux of the issue is that if you have a circuit capable of supplying
a current significantly in excess of the rating of the appliance flex,
then you need a overcurrent protected plug. So its not really anything
to do with the circuit being a ring or not, even if that is the most
commonly encountered 32A circuit in the UK.

--
Cheers,

John.

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