Mike, During Hi-pot testing, in addition to punctured wiring insulation and blatant mis-wiring, I have experienced failures due to faulty/broken components recognized power supplies used inthe equipment. Therefore I am all for it . . . .
John Juhasz Fiber Options Bohemia, NY -----Original Message----- From: Eric Petitpierre [mailto:[email protected]] Sent: Friday, September 01, 2000 8:33 AM To: Mike Morrow Subject: Re: Why routine hipot is required. Mike, It would be an easier job to explain if the supply was Recognized rather than Listed. The best way I can think to support you arguement is to give examples. For example, I have seen ac leads get miswired. If the supply is fed through an on board IEC connector, it is hard to mess that up. Another example is the screws holding the supply in place. Suppose the usual screws are not available for whatever reason..longer screws get used instead. Those screws could compromise the isolation. Seen that happen as well.. Good luck, Eric Petitpierre [email protected] _____________ _________________ Reply Separator _________________________________ Subject: Why routine hipot is required. Author: [email protected] (Mike Morrow) at smtp List-Post: [email protected] Date: 8/31/00 1:40 PM I've been asked why a routine hipot test is required on an end assembly computer when it uses a Listed power supply that has already been hipot tested. So far I don't like the way I've worded my response. Basically what I've said is that a power supply is approved as a component. The end safety of the device depends on the installation. Can anyone add some more beef to this statement. Thanks. Mike Morrow Senior Compliance Engineer Ucentric Systems 978-897-6482 [email protected] www.ucentric.com ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
