In message <[email protected]>, dated Tue,
9 Apr 2013, Peter Merguerian <[email protected]> writes:
It does not make a difference. I have also seen standards with 6 V
mentioned. I also do not think you will get variations in impedance
results if you test inject a current of 5 A, 10 A or as I have seen a
manufacturer do it at 40A as they mentioned that a Canadian test
organization insisted they do it as part of their production-line tests!!!
The current value is set by the possibility that a too-small wire or one
with broken strands would not carry the fault current.
The voltage requirement is (or was traditionally) set so as to break
down any surface-layer resistance in metal-to-metal contacts.
--
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
They took me to a specialist burns unit - and made me learn 'To a haggis'.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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