On Monday, 24 April 2017 18:14:05 UTC+1, John Rumm wrote:
On 24/04/2017 17:20, tabbypurr wrote:

1mm2 drops 44mV per metre of both conductors, 0.5 would thus be 88mV.

Per meter *per amp*

Oh yes So it's 26m radial, 52m ring. That's workable in many flats.

I suspect the future will see incadescents disappear more or less entirely, and the 100w per fitting drop to half or less.


NT