For 'operational', it is important to verify that the specific scope and limitations of functional insulation meets 5.3
Search the standard for every instance of 'functional insulation'. Brian -----Original Message----- From: [email protected] [mailto:[email protected]]On Behalf Of Peter Merguerian Sent: Tuesday, January 29, 2013 12:27 PM To: [email protected] Cc: Amund Westin; [email protected] Subject: Re: Minimum distance 12DC to gorund Alternatively you can conduct a hipot for operational insulation Sent from my iPhone Peter S. Merguerian [email protected] Go Global Compliance Inc. www.goglobalcompliance.com (408) 931-3303 On Jan 29, 2013, at 12:13 PM, Richard Nute <[email protected]> wrote: Hi Amund: Depending on test house acceptance, you can perform a fault test by shorting the 12 V to the safety ground. If the result is no shock hazard (which will be the result), then the Table 2M clearance distances can be ignored (for both SELV and ELV circuits). Best regards, Rich On 1/29/2013 1:52 AM, Amund Westin wrote: An IEC/EN 60950-1 issue Consider a PCB with maximum (secondary) voltage +12VDC. What are the minimum distance between the 12VDC signal traces and the chassis ground /safety ground? Do we talk about Table 2M in IEC60950-1? Because of lack of space, the PCB must maybe be mounted directly to the chassis surface. Best regards Amund - ---------------------------------------------------------------- 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 <[email protected]> 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://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
