In article ,
ARWadsworth wrote:
Just how much extra work is it to run an earth from the socket to the
box terminal? There's usually enough ECC left after stripping back so
the only real cost is a piece of sleeving...

More work than an electrician can be bothered to do:-)

Well, imagine the scenario where a metal box sits below the plaster - or
has tiles over it. Would you really rely on the thread of a screw to make
a decent contact throughout its likely life?

I have however, seen one DIY garage rewire using trunking and plastic
surface mount boxes where the DIYer took an earth lead from the socket
to the earth lug in the plastic box.

To be sure to be sure. ;-)

--
*Why is the man who invests all your money called a broker? *

Dave Plowman London SW
To e-mail, change noise into sound.