Hello Rich, Thank you for your comment.
What you wrote is a good general approach however in this particular case phase conductors will be attached directly to terminal of the mains switch and PE conductor will be fixed to a stud terminal. So I cannot compare dimensions directly. Do you maybe know why table is limited to 80A? Best regards, Bostjan On 1. dec. 2016, at 19.37, Richard Nute <[email protected]<mailto:[email protected]>> wrote: As a general rule, the PE hardware should be the same as the phase hardware. Since, under worst-case fault, the PE will carry the maximum phase current from the wall, construction should be the same as phase construction. Bonding conductor (internal earthing conductor) hardware depends on fault current within the equipment, usually depending on the internal overcurrent protective device rating. Rich From: Scott Aldous [mailto:[email protected]] Sent: Thursday, December 01, 2016 9:04 AM To: [email protected]<mailto:[email protected]> Subject: Re: [PSES] dimension of the stud for PE Ken alluded to this before - alternately, 2.6.4.2 allows you to run the test of 2.6.3.4 for constructions that don't meet the requirements of Table 3E. On Wed, Nov 30, 2016 at 8:42 PM, IBM Ken <[email protected]<mailto:[email protected]>> wrote: Bostjan; That is my understanding; use the table to determine the cross-sectional area (as wire) required, and then ensure that the stud&nut arrangement provides at least triple that contact area. -Ken On Wed, Nov 30, 2016 at 11:33 PM, Boštjan Glavič <[email protected]<mailto:[email protected]>> wrote: Hi Ken, Thanks. So on short, if table 3B brings requirement of 50mm2 conductor, you would accept terminal if it brings contact area of 150mm2? Best regards, Bostjan From: IBM Ken [mailto:[email protected]<mailto:[email protected]>] Sent: Thursday, December 1, 2016 5:24 AM To: Boštjan Glavič <[email protected]<mailto:[email protected]>> Cc: [email protected]<mailto:[email protected]> Subject: Re: [PSES] dimension of the stud for PE Hi Bostjan! Can note (c) in Table 3E be applied to this product? I think it is justifiable to extend the protective bonding rules to the PE connection; i.e. to pass the bonding test or to verify via inspection that the PE conductor is "not smaller" than the mains supply - but that's just my opinion. -Ken On Wed, Nov 30, 2016 at 10:53 PM, Boštjan Glavič <[email protected]<mailto:[email protected]>> wrote: Dear experts I hope there are some experts dealing with IEC 60950-1 standard. We have a product that has rated input current 130A. Unit is intended for permanent connection to mains and provide special terminals for 3 phases and bolt with stud for PE connectio. Question is how should we evaluate dimension of this PE stud according to clause 2.6.4.2, 3.3.5 and table 3E of IEC 60950-1 since values in the table go only up to 80A rated current. Thank you for your support. Best regards, Bostjan - ---------------------------------------------------------------- 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]<mailto:[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://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[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]<mailto:[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://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[email protected]>> -- Scott Aldous | Regulatory Compliance Program Manager | [email protected]<mailto:[email protected]> | 650-253-1994 - ---------------------------------------------------------------- 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]<mailto:[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://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]<mailto:[email protected]>> Mike Cantwell <[email protected]<mailto:[email protected]>> For policy questions, send mail to: Jim Bacher <[email protected]<mailto:[email protected]>> David Heald <[email protected]<mailto:[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://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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
