"BigWallop" wrote in message
. uk...

"Bert Coules" wrote in message
...
NT,

16mm2...

OK, thanks for that.

...and it must be earthed within 2m of the sink,
so you may have to take a tile up to get an earth
rod in as well.

There's no earth anywhere near two metres of the sink in any direction
including straight down. Does the sink have to have a *direct*
independent connection to actual earth? The rest of the internal
copper pipework is earthed back to the consumer unit (in very hefty
cable, which I take to be 16mm2) and thence to the incoming supply's
earth; surely it would be sufficient to bond the sink to the nearest
available copper pipe?

Bert


Aren't the pipes bonded? Or are they plastic? If the pipework is copper,
then
they should already have earth straps and green/yellow wire to them. If they
have been bonded, then connect the sink to one of the straps.



Should have added that you use the same gauge cable that is already on the earth
straps. :-)