RE: The odd thing that I noted very clearly at the time was that the standard did not include any concept of a real partially- or fully-sealed enclosure where any internal fires could be contained within the enclosure without external flame spread or other related hazards. That, I thought (still do) was a major oversight by the standard developers who had adopted the 60950 enclosure requirements almost verbatim and without full consideration of the very wide range of equipment to which the standard might then be applied. Unfortunately, this often happens, and if you draw attention in the committee to the fact that all the necessary work hasn't in fact been done by another committee, you may not be overly popular. I had an enquiry once as to whether IEC 60065 could be applied to a 10 kW industrial fan heater, because that was the only standard their safety expert knew about. With best wishes DESIGN IT IN! OOO – Own Opinions Only <http://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England From: John Allen [mailto:[email protected]] Sent: Saturday, May 21, 2016 7:47 PM To: [email protected] Subject: Re: [PSES] fire safety test methods for different country standards Rich With respect to actual testing of the materials in the enclosure, that was also impractical because there was (still is) a wide range of lengths and diameters, which were always very well populated because they were (are) made as compact as possible for the intended applications. Therefore we were pretty happy that the same principles as outlined in my previous email did apply across the range.
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