In message
<46b74057309b4f7e943f58221fd6d...@bn1pr08mb059.namprd08.prod.outlook.com>
, dated Thu, 4 Sep 2014, "Nyffenegger, Dave"
<[email protected]> writes:
With regards to electronic power supplies most data sheets I have seen
state compliance to UL 508 and EN 60950-1 but do not specifically
mention anything about meeting SELV or PELV requirements. Some do. The
question is it can somehow be assumed that an electronic power supply
compliant with UL 508 and/or EN 60950-1 and/or UL listed does in fact
meet requirements for SELV?
The power supply as a whole cannot claim that unless ALL its outputs
meet the SELV requirements. But it does meet the requirements for safety
isolation, so those outputs that meet the voltage requirements are SELV.
Or is there another standard that also specifically meets the
requirements for PELV?
I don't think so. It's up to you to convert an SELV output to PELV by
connecting one side to the PE conductor.
Or does this need to be specifically confirmed with the manufacturer
beyond the basic UL 508 and/or EN 60950-1 if the data sheets do not
specifically claim a PELV rating?
I doubt that you will find many power supplies that have PELV outputs
(i.e. with one side connected internally to the PE).
--
OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk
Quid faciamus nisi sit?
John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK
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