Hi Ken, With short delay, Thank you.
So on short, if flexible cord is used, cord must have a plug, if wiring terminals are used, cord must be put in conduits. Do you know the background of this requirement? Is this applicable even if unit is used in a computer room with raised floor? Best regards, Bostjan From: IBM Ken [mailto:ibm...@gmail.com] Sent: Monday, September 5, 2016 6:52 PM To: Boštjan Glavič <bostjan.gla...@siq.si> Cc: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Connection to ac mains with split end line cord Hi Bostjan! NEC (NFPA 70) has an Article 645 which covers "Information technology equipment" rooms. This article states, among other things, that flexible linecords must have a 'plug cap'. People sometimes mistakenly stop their analysis there, stating either that the intended installation location is not an "ITE room" or that the local Authority Having Jurisdisction has waived that requirement. However, 60950-1 has D1 deviations and Annex NAE makes specific reference to the fact that equipment must comply with the requirements in article 645 of NFPA 70. Therefore, ITE (regardless of what the intended installation location is or what the AHJ says) Listed to 60950 must comply by having a plug on the end of the flexible line cord (which also must be <14' long after exiting the cabinet, by the way). Some will attempt to work around this by declaring the mains branch circuit breaker box as another piece of ITE and then declaring the flexible linecord as 'interconnecting cable' but this is not legitimate either. The only accepted method of providing stripped power leads that meets the requirements of 60950-1 and the NEC is to provide the equipment with wiring terminals and provision for mounting of conduit. -Ken A On Mon, Sep 5, 2016 at 9:36 AM, Boštjan Glavič <bostjan.gla...@siq.si<mailto:bostjan.gla...@siq.si>> wrote: Dear experts, Can you help me with below item. I do not have experiences with NEC/CEC. Some people told me that only ATMs are allowed to be connected to mains without the plug, but i think this is strange requirement. Customer has an IT equipment cabinet (IEC 60950-1) with built-in power supply rack (shelf) with several modular power supplies. Power of such cabinet is rated round 200 kVA. The power supply rack is provided with two special (UL 1977) input connectors. Connection to supply will be realized by split end line cord (with plug/connector on unit side and split end on the other side). Split end of the cord will be connected to junction box mounted under the floor. Junction box will be connected to control panel. Unit will not be directly supplied from the panel, but always from the junction box. Cables and connectors will not be visible / accessible from outside, but only after opening of front cover of the end system rack (this action is allowed to service personnel only). Manual circuit breaker will be provided in wall installation. Is such construction acceptable by NEC and CEC? 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 <emc-p...@ieee.org<mailto: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<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald: <dhe...@gmail.com<mailto:dhe...@gmail.com>> - ---------------------------------------------------------------- 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>
