In message 
<1f5308c5923f3b4daa51d189bf25500602978...@edgmsmail01.eu.thmulti.com>, 
dated Fri, 7 Sep 2007, Carpentier Kristiaan 
<[email protected]> writes:

>Which IEC standard gives this classification?

For example, IEC 60065. However, the information is not obvious and 
there is an error, which I will take up with the relevant committee.

4.1.3 gives the upper ambient temperature limit as 35 C 'unless 
otherwise specified'. In the 'conditions applicable' of Table 3, the 
explanation of '35 C for temperate climates and 45 C for tropical 
climates' is given, but attributed in error only to reference 'a' in the 
table, which is 'metallic enclosures'. This was corrected in Corrigendum 
1, where metallic enclosures were given reference 'b', but now there is 
no reference 'a' in the table at all! It should be added to the headings 
of the columns 'Normal operating conditions' and 'Fault conditions'.
-- 
OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk
There are benefits from being irrational - just ask the square root of 2.
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK

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