Hi Chris,
I understand it may be an agency requirement to hipot, but I am not sure that a hipot test would necessarily reveal potential insulation failures/faults that would lead to the type of hazard you indicated. Surely these hazards have already been addressed in the design/type-testing phase? Enci At 15:22 06/11/01 -0500, "Chris Maxwell" <chris.maxw...@nettest.com> wrote: >Your answer would be a possibility for "self-certification" cases. >However, if we want to use an NRTL mark such as UL, TUV, CSA ...; then >the agency will dictate whether or not to hipot. My understanding is >that such agencies will require hipot on products even if they are rated >48VDC (which may be considered SELV) as long as the products use more >than a minimum power level. My understanding is that the power level is >around 15Watts. > >I believe that the reasoning behind this has more to do with fire safety >than shock safety. Any product that draws more than a certain power >level (again I think that about 15 Watts is the cutoff) from a DC mains >(i.e. station battery ...) is considered a definite power/energy/fire >hazard...thus the hipot requirements. ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Michael Garretson: pstc_ad...@garretson.org Dave Heald davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
