Thank you, Rich, I notice that I am more tolerant of requirements when I understand their reason for existence. This, unfortunately, is not part of a standard's format;-- however, it would be of great benefit ( I am changing subjects now!) if standards routinely identified the objective of every test, and sometimes even of requirements. What happens often is that due to either poor sentence structure or poor translations, the language is so garbled that it is not at all clear what the whole thing is all about. This then becomes an open field for a multitude of 'interpretations'. In majority of cases this could be avoided by clearly stating the objective and employing good writing techniques.
Tania Grant, [email protected] <mailto:[email protected]> Lucent Technologies, Communications Applications Group ---------- From: Rich Nute [SMTP:[email protected]] Sent: Thursday, March 23, 2000 5:25 PM To: [email protected] Cc: [email protected]; [email protected]; [email protected] Subject: Re: Certification of Products and other emerging countries Hi Tania: > For example, I always thought that it was a perfectly ridiculous idea to > require that all equipment falling under the scope of IEC 950 should be > double insulated, as pushed by certain Nordic countries many ages ago. > Until--- until it was pointed out to me that certain Nordic countries have a > heck of a time finding a reliable ground connection in permafrost. I no > longer think that this is a ridiculous idea;-- I am just grateful that we > still have choice in IEC 60950. That's not the only reason... Norway uses the IT power distribution system; nothing wrong with that. But, not all Norwegian outlets include a ground contact. A few years ago, I was at NEMKO in Oslo for a meeting. The NEMKO main meeting room has two-wire outlets! (Their labs have grounding-type outlets.) When I lived in Spain, my NEW condo (1994) had BOTH grounding and two-wire outlets, depending on location. The outlets that were optimally positioned for lamps were two-wire; all of the rest were grounding. Unlike the USA, the two-wire outlets in both NEMKO and my condo accept grounding-type plugs. Two-wire outlets commonly exist in homes throughout the world. For this reason, our grounded products are also double-insulated. (The ground wire is for EMC purposes, not for safety purposes.) 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]
