Hi Doug, It might be worth looking into practices for MV switchgear, where circuits are sometimes grounded during maintenance (not the same thing, but a similar concept). Here is an example from Siemens:
http://www.energy.siemens.com/us/pool/us/power-distribution/ansi-standard-products/medium-voltage-switchgear/metal-enclosed-load-interrupter-switchgear-type-simosec-5-kv-27-6kv/SIMOSEC%20ANSI_02_final.pdf Fig. 8 shows a diagram of the 3 position switch design that prevents accidental shorting of the supply to ground. It's a little hard to see the detail, but Fig. 5 shows some markings for the switch position indication (and a warning on the same panel that isn't good enough resolution to actually read), but no standard symbols are used, only English. Reliance on restriction of access to qualified individuals only might make the use of symbols less common with MV equipment, but maybe there are better examples out there. On Tue, Oct 11, 2016 at 1:25 AM, John Allen <john_e_al...@blueyonder.co.uk> wrote: > John’s suggestion sounds reasonable, but I think you also need the > triangular Caution symbol and/or the ISO symbol telling you to “consult the > manual”, adjacent to the switch. > > > > John E Allen. > > W.London, UK > > > > *From:* John Woodgate [mailto:jmw1...@btinternet.com] > *Sent:* 11 October 2016 08:53 > *To:* EMC-PSTC@LISTSERV.IEEE.ORG > *Subject:* Re: [PSES] Shorting switch - appropriate markings > > > > Would IEC 60417-5274: Manual change-over unit do? > > > > With best wishes DESIGN IT IN! OOO – Own Opinions Only > > www.jmwa.demon.co.uk J M Woodgate and Associates Rayleigh England > > > > Sylvae in aeternum manent. > > > > *From:* Doug Powell [mailto:doug...@gmail.com <doug...@gmail.com>] > *Sent:* Tuesday, October 11, 2016 7:49 AM > *To:* EMC-PSTC@LISTSERV.IEEE.ORG > *Subject:* [PSES] Shorting switch - appropriate markings > > > > Hello all, > > > > As we all know there are a variety of ON & OFF symbols available with > slightly different usage depending on the situation. > > > > IEC 60417-5007 Power ON > IEC 60417-5008 Power OFF > > IEC 60417-5009 Standby > > IEC 60417-5010 ON-OFF > > IEC 60417-5011 ON/OFF, push button > > IEEE 1621 Sleep Mode > > > > I now have a situation where I want to use a shorting switch on equipment > to prevent a stored energy hazard while in maintenance mode. The idea is to > provide instructions on how to discharge the equipment and then close the > switch to prevent a voltage build up until maintenance is complete, then > open the switch. My concern is identifying the appropriate symbol to place > next to the switch positions. None of the above seem appropriate. In > addition I have searched through ISO 7000 and 7010 with no luck. > > > > Can anyone suggest an internationally recognized symbol for this purpose? > > > > > > Thanks, Doug > > > > > > -- > > > > Douglas E Powell > > doug...@gmail.com > http://www.linkedin.com/in/dougp01 > > - > ---------------------------------------------------------------- > > 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) <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> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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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) <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> > Mike Cantwell <mcantw...@ieee.org> > > For policy questions, send mail to: > Jim Bacher <j.bac...@ieee.org> > David Heald <dhe...@gmail.com> > -- Scott Aldous | Regulatory Compliance Program Manager | scottald...@google.com | 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 <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>
