On Tue, 23 May 2006 18:46:19 GMT, "dennis@home"
wrote:

T i m wrote:

As if any 250V is going to 'escape' from (say) some SWA, through 3
layers of insulation and a bundle of steel (earthed) wires then melt
through another two layers of insulation to get to the Cat5 copper
wires (that are optically isolated anyway) ... shrug.

Cat 5 is not optically isolated.
Ethernet uses pulse transformers.

Ok, 'isolated' .. (the line drivers i used to repair were 'optically
isolated', typically run over what used to be called an EPS8 ccts I
think?) but the spirit of what I was saying remains.

I hope the rest of what you said is correct.

Pass? ;-)

All the best ..

T i m