Hello Roger,
The present IEC numbering scheme was adopted on 1/1/97 at the
recommendation of the ISO/IEC Joint Technical Advisory Board.
And, in case you were wondering; the purpose was to harmonize the IEC
numbering scheme with the European Norms numbering scheme (in which the
number 6 was added to the IEC Standard Number by CENELEC).
ISO standards are numbered from 1 to 5; IEC standards are numbered
from 6 to 7 (and, I believe the 6 series is reserved for
electical standards).
Regards, Art Michael, Editor - Int'l Product Safety News
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On Fri, 6 Aug 1999 roger...@astec-asia.com wrote:
When were the IEC1000-4-x series EMC standards changed to
IEC61000-4-x?
Regards,
Roger
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