It is an efficiency marking for external power supplies. Current US requirement is level VI. You can download more info from the DOE here <https://www.regulations.gov/document?D=EERE-2008-BT-STD-0005-0218>.
On Wed, Apr 12, 2017 at 10:31 AM, John Woodgate <jmw1...@btinternet.com> wrote: > What does the letter V in a circle mean? > > > > Only adepts of the 9th order of All High Jimbo or higher may know. > > > > 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:* Richard Nute [mailto:ri...@ieee.org] > *Sent:* Wednesday, April 12, 2017 5:38 PM > *To:* EMC-PSTC@LISTSERV.IEEE.ORG > *Subject:* Re: [PSES] Voltage Rating vs Voltage Specification > > > > > > > > Hi Brian: > > > > It’s is so funny to me how our company seems to spend more time on the > simple issues. And we are not even talking about the Current rating, the > 80% rule on pluggable equipment, how some inspectors want to see an > “Average Current” or “Max. Continuous Current” rating on the instrument, or > where some standards allow you to include an additional current rating in > “brackets” that represent current levels higher than 10% of the rated > current that occurs within the first minute of operation. Crazy man. > > > > This is a topic which everyone “understands,” whereas the other safety > topics belong to the regulatory person. Everyone is an expert on ratings: > how to “clearly” and “completely” (in their opinion) express the ratings. > And, everyone (even the standards committees) have their opinion of what > the customer needs to know (yet the customer just plugs it in and doesn’t > pay any attention to the rating markings or the details in the manual). > For the most part, the ratings and their expression are for the > certification house or the inspector. You can’t satisfy them all. Assert > your authority as the regulatory person. > > > > Best regards, > > Cynical Rich > > > > ps: I wanted to know if my new phone direct plug-in charger would work on > 230 volts; it does. Small, grey printing on the white body was hard to > see. 120-volt plug; would require an adapter. House symbol without the > arrow pointing in or out. What does the letter V in a circle mean? > > > > > > > > > > > > - > ---------------------------------------------------------------- > > 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. 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>
