I read in !emc-pstc that Luiz Claudio Bonilla de Araujo <[email protected]> wrote (in <[email protected] .org>) about 'IEC 417 Protective Earth Symbol' on Wed, 4 Dec 2002: >I have a doubt concerning IEC60335-1, paragraph 7.8, which is reproduced >below: > >7.8 Except for TYPE Z ATTACHMENT, terminals used for connection to the >supply mains shall be indicated as follows: > >terminals intended exclusively for the neutral conductor shall be indicated >by the letter N; >protective earthing terminals shall be indicated by the IEC 417 Protective >Earth Symbol. >Question: > >Is it possible to have two protective earth symbols in the same appliance?
Yes, the standard clearly says 'terminals'. If it said 'terminal', there might be some doubt, but I can't see any reason why two terminals should not be present, *IF*, when the protective earth conductor is connected to the 'wrong' earth terminal in error, the product is still safe. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- 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] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
