Koh, Review the requirements for fault testing in either UL 6500, 2nd ed or EN60065 6th ed (cls. 4.3.10). They state that "each group of ventilation openings that are likely to be covered simultaneously, shall be covered in turn and tested seperately".
" Ventilating openings that are likely to be covered simultaneously are: - openings on top of the apparatus, for example by a newspaper; or - openings on the sides and back, excluding the front, for example when pushed into a hanging curtain". Good Luck, George -----Original Message----- From: Koh Nai Ghee [mailto:[email protected]] Sent: Monday, September 04, 2000 9:31 AM To: EMC-PSTC Subject: Logo for Ventilation Hole Hi EMC-PSTC group, A team within my company is currently designing a amplifier speaker unit. Due to the current drawn is high and heat are dissipated. Therefore the encloseure need some ventilation hole. Unfortunately, till the very late stage of the design cycle, they found out if this ventilation hole was blocked, it will cause the plastic enclosure to melt. A question was asked, Is there a safety label/logo that we can affixed onto the plastic enclosure so that to tell user not to block this enclosure? (Or not to place it in a area where the ventilation will be blocked.) I've never seen such label or logo before. Has anyone out there seen such type of label/logo? Any advice from the group would be much appreciated. Regards Koh ------------------------------------------- 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]
