"js.b1" wrote in message
...
A Type-B 32A CPD needs 5*In or 170A for instant trip, whereas a BS1362
13A needs around 7*In or 91A for "pretty quick trip". Quality & most
likely age is a factor - a fuse dissipates about 8W at 13A. You'll be
delighted to know dodgy BS1361 fuses exist: no sand, they don't 'arf
go bang.

An MK double socket is rated to 19.5A continuously. It is indeed worth
running a new spur from wherever to at least another double socket.

There is a small chance the "32A ring" might actually be 32A radial in
4mm. For some houses it can be much simpler than forming a ring in
2.5mm, so do not be surprised. There is a length limit because 4mm CPC
in just 1.5mm (lawd knows why, could easily have made it 2.5mm but
there we go). Almost makes you want to use 6mm, but getting twin of
that into a double socket in 35mm backbox just isn't going to be
funny.

I believe on RCD protected circuits the length of a 4mm 32A radial is
limited by voltage drop and not the earth loop.

Adam