Dear experts, Is there anyone familiar with above mentioned standard? We are struggling with requirements for clearance and creepage distances. Specially how to read clause 4.17.5, which is alternative method for distances. Original distances are enormous and almost impossible to be fulfilled inside charging unit.
Below is extract from the standard. How do you read it? To comply with 4.17.5 is it required to comply with 1) a or b or c 2) a and b or a and c Thank you for your support. Best regards, Bostjan 4.17.5 On printed wiring boards, their connectors, and board-mounted electrical components wired on the load side of line filters or similar voltage-peak reduction networks and components, the spacings may be less than those specified in Tables 5 and 6, provided that (a) there are no openings in either the enclosure or the wiring board, and its components have a conformal coating; (b) the wiring board complies with the requirements of Clause 6.19; or (c) a minimum spacing of 0.580 mm plus 0.005 mm per V peak is maintained through air and over surface between uninsulated live parts and any conductor parts (live or dead) not of the same polarity. Enamel wire shall be considered a bare live part, and an oscilloscope with adequate frequency response shall be used to determine peak voltages. - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
