Angus & Doug - Even though 1310 power supplies may only comply with Basic Insulation (per UL60950), they have the bejeebers tested out of them. UL1310 emphasizes testing over construction, whereas UL60950 emphasizes the contrary.
Since a UL1310 power supply must meet the requirements for NEC Class 2 power sources, there is no need for any additional testing to demonstrate compliance with LPS requirements in UL60950. The LPS requirements are derived >from (though somewhat less stringent than) NEC Class 2 requirements. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA [email protected] > -----Original Message----- > From: [email protected] > Sent: Thursday, May 08, 2003 11:24 AM > > One > thing to remember though > is that a Class 2 power supply only requires > basic insulation between > primary and secondary, and most class 2 wall wart > units are built this way. > Depending on what your equipment you should > assess whether this is a > problem for your overall safety strategy. The > class 2 power supply is a > different animal from a Class II power supply as > defined in 60950. > > Regards > > Doug > 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
