Nic It appears that 61010-1 is finally becoming conscious of the differential relation ships in sourcing circuits.
I think "opposite" is referring to single phase sources Line to Neutral in a Typical AC system or + to common (-) in a DC. So it is referring to the spacing's between the sourcing inputs across terminal blocks, pcb etc. But one should be able to extend this to be "differing phases" line to line in poly phase applications as well. Chris Eaton Corp Subject: Re: Meaning of "opposite polarity" in IEC 61010-1 Ed. 3 Mic Between L & N Sent from my iPhone Peter S. Merguerian [email protected] Go Global Compliance Inc. www.goglobalcompliance.com (408) 931-3303 On Sep 27, 2012, at 11:43 AM, Nic Johnson <[email protected]> wrote: Edition 3 of IEC 61010-1 added the following line to Section 9.6.1; "A minimum of BASIC INSULATION is required between MAINS-connected parts of opposite polarity on the supply side of the overcurrent protection device." Does anyone know what "opposite polarity" is supposed to mean in this context? It doesn't appear to be in reference to DC voltage or plugs. Does this refer to multi-phase system only? Any clarifications or interpretations would be appreciated. Nic Johnson NCEE Labs 402-323-6233 - ---------------------------------------------------------------- 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]> - ---------------------------------------------------------------- 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]>
