I read in !emc-pstc that Gordon,Ian <[email protected]> wrote
(in <E1BA0362B28ED211A1E80008C71EA3060206FBB9@EXC_EAS01>) about
'DERIVATION OF CREEPAGE AND CLEARANCES' on Fri, 25 Apr 2003:

>Does anyone know from where the values for creepage and clearances given in
>EN61010-1 ("safety requirements for electrical equipment for measurement,
>control and laboratory use - part 1 general requirements") are derived i.e.
>are there other standards "below" 61010 in this respect?

Look at IEC 60664 (multi-part). 
-- 
Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk 
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