IEC601 - Spacings Requirements

All - Is anyone aware of a revision to IEC601 that would affect the creepage and clearance distance requirements? Any details or history would be kindly appreciated. Best Regards, Brent Taira --- This message is from the IEEE EMC Society Product Safety

Re: origin of common-mode currents - part 2

Jim and everybody who answered, Thanks a lot for making this subject clear for me... One more time, the list shows all its power so solve problems, even worldwide! Best Regards Muriel --- This message is from the IEEE EMC Society Product Safety

FW:

GR-63 is aligned with ETS300.019-2-3 and ANSI T1.304. Regards, Bandele Jetstream Communications, Inc. badep...@jetstream.com -Original Message- From: e...@itsqs.com [mailto:e...@itsqs.com] Sent: Wednesday, May 03, 2000 3:37 PM To: gmcintu...@telect.com; emc-p...@ieee.org Subject:

ANNOUNCE: Japanese version of s.e.e.c FAQ

Dear Colleagues, I am very pleased to be able to announce that courtesy of Mr T Sato vef00...@nifty.ne.jp a Japanese version of the s.e.e.c FAQ: Sources of EMC Safety Compliance Information is now available on his website at URL: http://member.nifty.ne.jp/tsato/seec-faq/ This

Re: Ground potential differences....

Hi Kelly: First, I presume you are considering the TN power distribution system. The answers to your question are dependent upon the type of power distribution system, whether TN, TT, or IT. My response does not apply to the TT and IT systems. The first question that must be asked in

FW: Measurement Uncertainty for product safety tests

The RCIC page has as part of the File and Software Exchange section, an EMI test uncertainty estimate excel spreadsheet from Mr. Dan Hoolihan and posted by Tom Bao. It's based on NIS 81. http://www.rcic.com/files/download/NIS81R1.XLS Regards, Bandele Jetstream Communications, Inc.

RE: Re- Cost of compliance

The committees only set reasonable test levels, and can not cover all potential situations. If you meet the specified immunity levels there is a reasonable assurance that the product will work in most situations (but not all). To design all products to work in all environments would not be

RE: origin of common-mode currents

Hello Muriel and Group, I'll give it a try. I present a 1-day course in EMC system design 5-10x a year to Dutch engineers in little groups, and this is an extract. Imagine a digital circuit. 2 Ports A,B connected to each other. Input to gate A is a 10Mhz square wave or whatever. Please take a

RE: origin of common-mode currents - part 2

Muriel, I did find the reference citation that I was missing in my previous posting. D. Hockanson, J. Drewniak, T. Hubing, T, Van Doren, F. Sha, and M. Wilhelm, Investigation of Fundamental EMI Source Mechanisms Driving Common-Mode Radiation from Printed Circuit Boards with Attached Cables,

Re: Safety and EMC in Korea

Peter, ITE equipment is regulated (EMC, Telecom and Wireless Approval) by Ministry of Communication and Information. However, Safety Regulation (Jun Mark which is Safety Mark in Korea) is controlled by Ministry of Industry. Ryan Kim - Original Message - From: Peter Merguerian

RE: origin of common-mode currents

Muriel, I applaud your tenacity in trying to achieve an understanding of the common-mode current mechanism. Common-mode currents in printed circuit board structures are usually the result of an asymmetry. These asymmetries do not appear in circuit schematic diagrams, so they can be difficult

Re: origin of common-mode currents

Ken, I was impressed by a paper: Common mode current induced on wires attached to multilayer printed wire boards with segmented ground planes, by EMC lab of Univ. of Missouri-Rolla, pp. 116-120, 1994 IEEE EMC Symposium. That was the first article, to my knowledge, for EMC design community