On Tue, 24 Apr 2018 17:05:02 -0700 (PDT), wrote:

On Tuesday, 24 April 2018 20:33:41 UTC+1, Roger Hayter wrote:
Archibald Tarquin Blenkinsopp wrote:




Personally I would make the observation with a DMM. The 10Meg input
resistance would be more than enough to take the cable into a
definable voltage range.

AB

It already is!! The PD is there, irregardless of you connecting
anything. Inductive reasoning from knowing what happens at the other
end and making the reasonable assumption that the cable contains
continous length(s) of conductive copper is perfectly sufficient for
*truth* with a high degree of probability. No test is necessary! No
current flow is necessary.

Stop talking sense Roger. Let him enjoy his planet in peace.

Roger appears to have made the measurement at the point the cable is
connected to, thus the point is live and the cable becomes live.

If the cable did not contain continuous lengths of conductive copper
then depending on the resistance the cable could once again become
live, or not as the case may be.

This incidentally would tend to be a theoretical situation because the
levels of resistance needed would not be produced by manufacturing
flaws.

AB