Peter - I agree that this is an acceptable result in the US and Canada. There are, however, additional considerations:
For Pluggable Equipment Type A (to borrow a term from the 60950 standards), the largest branch circuit protection is assumed during testing (20A) and there is no further requirement. For Pluggable Equipment Type B and permanently connected equipment, it would then be necessary to specify the largest branch circuit protection device the equipment may be safely supplied from in the installation instructions. This would necessarily be the size of the protection involved during your testing. I am very interested in the nonNorth American view on this issue. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA [email protected] From: peter merguerian Sent: Tuesday, January 28, 2003 11:54 AM Dear All, For safety, it is not clear from the standards whether the main branch circuit breaker tripping during fault conditions is an acceptable result. I see no reason why this should not be acceptable. What is your view? Some third party labs find it acceptable and others do not. Anyone can lead me to some inernational decisions regarding this issue? Thanks, Peter 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
