>As far as I know, EIAJ CP1104 is the only standard >worldwide that has the dc polarity symbol for >barrel connectors. (Likewise, as far as I know, >Japan has the only standard for barrel connectors.)
This symbol is definitely NOT in IEC 417. I'm glad somebody asked that question - I've wondered it myself. Thanks for answering, Rich. Doug Massey LXE, Inc. -----Original Message----- From: Rich Nute [mailto:[email protected]] Sent: Thursday, November 30, 2000 12:16 PM To: [email protected] Cc: [email protected] Subject: Re: Polarity Markings on AC Adapters Hi George: > Thanks for the quick response! Does this mean that the symbology is only > a Japan requirement? ............and does it apply to ITE as well as > audio-visual > equipment? The referenced standard, EIAJ CP1104, is similar to IEC 417. Indeed, EIAJ CP1104 contains many symbols from IEC 417 as well as from other sources. While the symbols are primarily those relating to audio-visual equipment, many of the symbols have much broader application, e.g., ground symbols, ac and dc symbols, etc. I cannot say whether or not these symbols are requirements in Japan or whether or not the standard applies to ITE. I would guess, however, that EIAJ CP1104 is a document which is referenced by end-product standards just as IEC 417 is referenced by end-product standards. (While I have a copy of the standard, it is in Japanese and I cannot read it!) As far as I know, EIAJ CP1104 is the only standard worldwide that has the dc polarity symbol for barrel connectors. (Likewise, as far as I know, Japan has the only standard for barrel connectors.) Best regards, Rich ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected] ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
