Doug - I have a copy of ISO 3684:1984 (quite old) in which the geometries of safety signs are described:
circle: prohibition or mandatory action triangle: warning square or rectangle: information (including instructions) One must assume (since it's not said in ISO3684:1984, ISO3641:1988, IEC60417-1:1998 or IEC60417-2:1998; though it may be in IEC60416, which is reference in the scope of IEC60417-2:1998 and is a normative reference in IEC60417-1:1998) that just a symbol for a product marking, without a surrounding geometric emphasis, is the same as if the symbol were on a rectangular sign. Answer to your trivia question - Per ISO 3684:1984, the slash runs 10:00 to 4:00 for a prohibition sign. This is not always followed, if the ISO 7000:1989, Symbol 0506, is any example. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com > From: POWELL, DOUG > Sent: Monday, May 12, 2003 4:53 PM > > Hello group, > > It has become apparent to me that various > standards require triangles at times when others > do not. For example, IEC 61010-1 Table 1 only > indicates 3 symbols that have the triangle > enclosing the symbol. While, IEC 60417 does not > indicate this. One that seems to be missing from > IEC 61010-1 is the exclamation point in triangle. > I've reviewed IEC 60204-1, EN50178, EN60950 as > well and I find varying requirements, some more > than others. SEMI S2 seems to indicate that > nearly every symbol belongs in a triangle. > > I'm guessing that if it is an informational > symbol, you do not use the triangle, but > countering this, I have seen the hearing > protection warning in a circle without the > triangle. Does anyone know of a reliable > rule-of-thumb for when to use a triangle on an > IEC/ISO international warning symbol? > > By the way, here's a trivia question to which I > do know the answer: > > On the circle-bar label warning, which angle does > the slash take, from 10:00 to 4:00 or from 2:00 > to 8:00 on the clock face? > > > thanks, > > -doug This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
