John, I would ask your friendly UL engineer how they test this, especially in Denver! Since UL/ANSI is a representative to the IEC 950 committee, they might be interested whether this correction was inadvertently omitted from Clause 6.4, or was intentionally left out! And yes, we'd all be interested what UL's response would be!
Tania Grant, [email protected] <mailto:[email protected]> Lucent Technologies, Intelligent Network Unit Messaging Solutions Group ---------- From: Boucher, John [SMTP:[email protected]] Sent: Friday, June 02, 2000 2:35 PM To: '[email protected]' Subject: High voltage testing and altitude correction factor All: I work for a test lab located approximately one mile above sea-level, and perform product safety testing on IT and telecommunications equipment (IEC 60950 and clones). I recently tested a telecom interface PWB that failed 6.4 HV testing (case c, 1.0kv). The PWB failed at approximately 900 volts. The PWB passed a re-test performed at an altitude correction factor (0.816). I know that clause 5.3 allows for altitude correction, but the standards dont mention any correction factors with regard to clause 6.4. Have any of you good people used altitude correction for clause 6.4 testing on international products? Any comments from you agency types? (yeah, you're good people too) Thanks. John Boucher Lucent Technologies ------------------------------------------- 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]
