In message <004c01ced6f2$b8ebbd90$2ac338b0$@dk>, dated Fri, 1 Nov 2013,
Niels Hougaard <n...@bolls.dk> writes:
Thank you for the answer.
It is the word "if" in the beginning of the sentence that to me
indicates that there is the other possibility "if not" as well.
I understand your point, but I think the text is ambiguous and must be
clarified by IEC/CENELEC.
9.6 says an overcurrent protection device 'must' (word not allowed in an
IEC standard to express a requirement; the committee needs to sharpen up
its editing!) be provided.
So 'If' in 9.6.3 appears to contradict the absolute requirement in 9.6.
Incidentally, if there is a 9.6 and a 9.6.3, that is also contrary to
IEC editorial rule banning 'hanging text'.
Edition 1 of 61010-1 (from 1993) had a somewhat clearer wording stating
that there must be an overcurrent protection device in the equipment,
and the changing of the wording could indicate that the requirements
had changed.
The change seems to be deliberate, but I think it is very
unsatisfactory.
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Nondum ex silvis sumus
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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