"dennis@home" wrote in message
...


"ARWadsworth" wrote in message
news:k%oSn.48388$s16.47511@hurricane...


That maximum cable for a 32A RCD protected ring is given as 106metres of
2.5T&E in the 17th edition. That is for the maximum 5% voltage drop.
For a 32A 6mm cooker supply the maximum length is 49m either with or
without RCD protection using a type B MCB.


Just to point out a few facts..

5% is 12v so the cable is dropping 12V which at 32A is 384 watts of power
being wasted.
That is a unit (~10p) every three hours.
It won't take long to pay for the next size up or even thicker cable.

Just think of how many mobile phone chargers you have to leave plugged in
to waste that much.
I wonder if the "regs" take into account the carbon footprint?


Well in winter the heat would not be wasted and in reallity the circuits
will not be running for long at full capacity. And all the appliances using
the circuit are greater than 95% efficient of course:-)

Adam