On 27/05/2015 20:16, GB wrote:
On 27/05/2015 20:00, dennis@home wrote:
On 27/05/2015 14:10, GB wrote:


I did wonder whether the cable is overspecified to allow for this.

No it isn't in a 2.5 mm2 circuit.


I was merely inferring from the small number of fires that the 2.5 mm2
cable is probably more than needed in most circumstances. For example,
cable is more likely to overheat if the house is hot, but users are less
likely to have a high power appliance like an electric fire switched on
when the weather is hot. That sort of thing.

In any case, who would design a system without a sizeable safety factor
built in?

Apparently there are a set of rules you have to follow to ensure you
don't damage a ring.

Like not plugging two 3k heaters in at the same end of the ring.

All these rules are well known and followed by all users.
If users choose to break the rules then its their fault and not the
system designers.