Hi Eric, In the viewpoint of safety, fault condition that should be considered is alway one case, which means safety requirement do not expect two short circuit conditions simultaneousely. So, my opinion is that it will be the proper to consider higher current due to severe short circuit.
Regards, John "Meunier, Éric" <emeun...@teknor.com> on 2000-03-15 12:23:44 ¿ÀÀü Please respond to nebs@world.std.com Sent by: "Meunier, Éric" <emeun...@teknor.com> To: nebs@world.std.com cc: (bcc: John Kim/CoProd/Seoul/KR/SGS) Subject: Grouding conductor fault current Hi, With regards to the GR1089 requirement for a grounding conductor to safely conduct fault currents "likely to be imposed" (Section 9.7.1, R9-10 [82]): Do we have to consider that multiple independent outputs of an embedded power source (ex: 5V and 3.3V) may be shorted simultaneously, or can we assume that only one would be shorted at a time? Best Regards, Eric =================================== Éric Meunier Architecte de conformité / Conformity Architect E-mail: mailto:emeun...@teknor.com Teknor Applicom Inc. 616, rue Curé-Boivin Boisbriand, Québec Canada, J7G 2A7 Tel: 1-450-437-4661 ext. 419 Fax: 1-450-437-8053 Web: http://www.teknor.com - - - - - - - - - - - - - - - - - - - - - - - - - - - - "The information in this e.mail and any attachments is confidential and is intended for the addressee only. Reading, copying, disclosure or use by anybody else is not authorised. The contents do not represent the opinion of SGS Société Générale de Surveillance Holding SA or any of its affiliates except to the extent that it relates to their official business. If you are not the intended recipient, please delete this message and any attachments and advise the sender by return e.mail" Visit our website: http://www.sgsgroup.com - - - - - - - - - - - - - - - - - - - - - - - - - - - -
