Rich:
There are incidents where there are capacitors in the equipment, that can have hazardous energy. UL 1778, safety standard for UPS has requirement for protection of safety personnel, where there is clause to make sure that makes sure that energy in the capacitor is discharged before service personnel has an access to the capacitor. Please be safe Stay Home - Stop the Spread – Save Lives Best Regards Bansi Patel M: 909-260-9403 bansipate...@gmail.com <mailto:bansipate...@gmail.com> From: Richard Nute <ri...@ieee.org> Sent: Tuesday, September 29, 2020 3:04 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] electric shock from capacitor discharge Hi Lauren: Thanks, but I recognize that many standards include such requirements. I am looking for instances (other than the pins of a power plug) where such requirements must be invoked. Stay safe! Rich From: lauren.cr...@us.tel.com <mailto:lauren.cr...@us.tel.com> <lauren.cr...@us.tel.com <mailto:lauren.cr...@us.tel.com> > Sent: Tuesday, September 29, 2020 2:52 PM To: ri...@ieee.org <mailto:ri...@ieee.org> Cc: EMC-PSTC@listserv.ieee.org <mailto:EMC-PSTC@listserv.ieee.org> Subject: Re: [PSES] electric shock from capacitor discharge Hi Rich, Discharge requirements are already in some electrical safety standards. Not at my desk so recall is poor, but likely 61010 or even NFPA 79 have something about caps with stored energy above x joules have to discharge within N seconds of power off... Cheers, -Lauren Sent from my mobile phone - please excuse typos, brevity, etc. On Sep 29, 2020, at 4:27 PM, Richard Nute <ri...@ieee.org <mailto:ri...@ieee.org> > wrote: I am interested in knowing what constructions, situations, and products where a capacitive discharge into a body could take place. I am aware of the X and Y capacitors discharge at the prongs of a power plug. I don’t immediately know of other situations or products that might discharge a capacitor into a body. I would appreciate descriptions of such discharges into a body, not conjecture. Preferably, normal conditions and some single-fault conditions. Do we need to include capacitive discharge requirements in the safety standards? Stay safe! Rich - ---------------------------------------------------------------- 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) <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 <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>
