On 01/04/2021 14:54, Max Demian wrote:
On 01/04/2021 12:29, Andrew wrote:
On 31/03/2021 17:39, Steve Walker wrote:
On 31/03/2021 15:36, Adam Funk wrote:

Better testing devices are now available (but I'm told my grandfather
used to use that kind of technique to check whether wiring was on or
off).

So did my grandfather. Unfortunately for other people, he seemed to
be electricity proof and what he could touch without a problem would
give others a hell of a belt.

Ex IT colleague went to work for London underground. He got the chance
to go into the tunnels one night and to test that the power was off they
had an ancient bit of wood with a number of bayonet-fitting bulbs
fitted along it, connecting the power rail to the running rail.

Actually the Underground has two power rails (centre and side). The
running rails are somewhere in between in potential.

No. the underground can run on either side rail *or* centre rail which
are both 'live' The running rails are earthed


--
Renewable energy: Expensive solutions that don't work to a problem that
doesn't exist instituted by self legalising protection rackets that
don't protect, masquerading as public servants who don't serve the public.