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
 <http://www.jmwa.demon.co.uk/> 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?
 
 
 
 
 
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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 
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