Re: Committee Memberships
Here is a link for UL Standards. http://ulstandardsinfonet.ul.com/stp/index.html -- Jody Leber jle...@onebox.com - email (404) 978-1264 x6901 - voicemail/fax marti...@appliedbiosystems.com wrote: To all, I am trying to find out what is required of an individual to become a member of committees that are responsible for creating standards. These committees would include, but not limited to, IEC Technical Committees, Working Groups and ANSI Standards Committees. My question is extremely general since I am trying to gather any and all information on this process. I am sure that many members of this forum are involved in various committees that are responsible for creating standards. Hopefully, you can shed some light on this issue. All responses are greatly appreciated. Regards Joe Martin Compliance Engineering Applied Biosystems marti...@appliedbiosystems.com --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list --- 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 All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
Medium Voltage Equipment
Is anyone aware of any medium voltage ( 2.2 kV) products on the market other than distribution equipment, switchgear, motor controllers, HVAC chillers and associated components. -- Jody Leber jle...@onebox.com - email (404) 978-1264 x6901 - voicemail/fax --- 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...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on browse and then emc-pstc mailing list
CE Mark
Update on what CE stands for according to the compliance community: 1. Conformite Europeene: 3 votes 2. Communaute European:2 votes 3. One of the above (undecided): 1 votes 4. No meaning: 1 vote Keep the answers coming. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
CE Mark
Is there an offcial website that defines what the CE actually stands for? I believe it is Conformite Europeene, however I have seen other definitions. I seached the europa site but did not have any luck. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: No longer online until our new server is brought online and the old messages are imported into the new server.
IEC 61000-4-10
ATTENTION ALL TESTING LABS We would like to perform testing to IEC 61000-4-10, Testing and measurement techniques - Damped oscillatory magnetic field immunity test. If you can provide this service please email me at the address below. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: DC/DC Convertors for CO Equipment
-Original Message- From: Jody Leber [SMTP:jle...@ustech-lab.com] Sent: Tuesday, May 01, 2001 8:28 AM To: 'Peter Merguerian'; EMC-PSTC (E-mail) Subject:RE: DC/DC Convertors for CO Equipment To all, The SELV output was based on US requirements with a nominal 48 Vdc up to a maximum of 60 Vdc. This information is from Clause 3.6 of UL 60950. If the voltage were greater than 60 Vdc and not exceeding 80 Vdc the circuit would be TNV-2. Above 80 Vdc would be a hazardous voltage secondary. I am not certain of the global requirements. I do know that at least one NRTL considers US centralized DC SELV by indicating the dc source is isolated from the ac source and grounded. A task group was formed by UL to address the concerns of this section. Would any of the members of this task group please provide some feedback for the masses. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Peter Merguerian [SMTP:pmerguer...@itl.co.il] Sent: Tuesday, May 01, 2001 7:22 AM To: EMC-PSTC (E-mail) Subject:DC/DC Converters for CO Equipment File: ATT9.txt; charset = windows-1255 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: DC/DC Convertors for CO Equipment
Peter, The centralized DC output is considered SELV with no testing. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Peter Merguerian [SMTP:pmerguer...@itl.co.il] Sent: Tuesday, May 01, 2001 7:22 AM To: EMC-PSTC (E-mail) Subject:DC/DC Convertors for CO Equipment File: ATT9.txt; charset = windows-1255 --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: CTI
Doug, Voltage CTI 600 V and greater 0 400 through 599 1 250 through 399 2 175 through 249 3 100 through 174 4 Less than 100 5 Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Massey, Doug C. [SMTP:masse...@ems-t.com] Sent: Thursday, April 19, 2001 1:23 PM To: 'IEEE Forum' Subject:CTI Hello Group - In the UL IQ for Plastics database, the CTI values are given as a single digit number, 0 thru 5. I know that the scale correlates to 100 V thru 600 V, but I forget which way it goes. Does CTI of 5 = 600 V, or is it the other way around? Is this scale given in UL746A or IEC 60112 ? Thanks in advance. Doug Massey Safety Approvals Engineer LXE, Inc. Norcross, GA., USA --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: Class I Division 1 versus Class I Division 2
Robert, I don't have the answer, but if you review Article 500 of the National Electric Code (NEC) and UL's website you may be enlightened. http://www.ul.com/hazloc/ Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Loop, Robert [SMTP:rl...@hnt.wylelabs.com] Sent: Thursday, March 15, 2001 11:13 AM To: emc-p...@majordomo.ieee.org Subject:Class I Division 1 versus Class I Division 2 Hello Group, I need some education on Classified/Hazardous locations. What is the difference between a product that is certified to Class I Division 1 versus Class I Division 2? If I had a product that was certified to Division 2, what would be needed to make it pass Division 1 requirements? I apologize for my ignorance, there are simply too many standards out there and this is out of my league. Sincerely, Robert Loop Engineering Supervisor Wyle Laboratories Product Safety ph - (256) 837-4411 x313 fax- (256) 721-0144 e-mail: rl...@hnt.wylelabs.com --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall, --- 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: Michael Garretson:pstc_ad...@garretson.org Dave Healddavehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://www.rcic.com/ click on Virtual Conference Hall,
RE: UL1697 ???
UL1697 (not in existence yet) will likely be the Standard for the broadband communications equipment detailed in NEC Article 830. If your equipment fits the description someone may be trying to get a head start. Best Regards, Jody Leber Laboratory Manager jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Robert Legg [SMTP:rl...@tectrol.com] Sent: Monday, September 25, 2000 4:14 PM To: IEEE EMC-PSTC Forum Subject:UL1697 ??? Forumites, UL1697. Anyone ever heard of it? It has shown up in a recent design spec for quotation and I suspect a typo. Rob Legg rl...@tectrol.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Environmental Chamber
Does anyone have or know of a walk-in environmental (Temp/Humidity) chamber for sale? Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Safety: Hi-Pot Suppression for TNV lines
Chris, Have you considered spray-on conformal coating in the telco area? Tech Spray SR is one option that is also UL Recognized. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Maxwell, Chris [SMTP:chr...@gnlp.com] Sent: Monday, May 22, 2000 10:34 AM To: 'EMC-PSTC Internet Forum' Subject:Safety: Hi-Pot Suppression for TNV lines Group, Is there an in-line adapter that we can install on a TNV line (in our case, a typical RJ12 phone line) to our product that will provide a second layer of hi-pot protection? The whole explanation follows for those who think they can help. Others can press delete right now and get on with their day. We produce a piece of fiber optic test equipment that is rack mounted and operates from 48VDC. Most of our typical equipment does not have TNV connections, however this does. We have designed a remote reset option. The remote reset consists of an RJ12 jack on the back of the unit. The user can plug a phone line into this jack. Once installed, the user can perform a 5 second power down on the unit by dialing the unit's phone number and letting the line ring 5 times. This has proved valuable to customers because the units are designed for remote installation. If the unit hangs up, they don't have to drive, fly, hike or swim out to where the unit is installed to perform a hard re-boot. This remote reset line only takes in the TIP and RING signals (the RJ12 only has pins 3 and 4 populated). Both TIP and RING have MOV's going to chassis ground. We have had the unit safety tested. During safety testing, the MOV's were cut (creating a single fault condition). When the MOV's were cut, the hipot test caused an arc to ground on a circuitboard within the unit. This arc was considered a failure. My guess is that the arc is caused by the fact that the tip and ring signals run close to a piece of the ground plane on the top layer of the board. My first stab at fixing this would be to clear out the ground plane so that it is furthur away from tip and ring. Now, even minor changes to circuitboards can cost thousands. It can also mean scrap. This unit is a very low volume product (hundreds annually). It may be more cost effective for us to add some sort of in-line suppressor external to the unit as opposed to revising the circuitboard. Given that the unit is rack mounted, I am assuming that there would be room in the rack to mount such a device, if it existed. Hence my question. Anybody have any ideas? Thank you for your time. Chris Maxwell, Design Engineer GN Nettest Optical Division 109 N. Genesee St. Utica, NY 13502 PH: 315-797-4449 FAX: 315-797-8024 EMAIL: chr...@gnlp.com --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Short-circuit Protection
Richard, My omissions follow: Now that I have the standards in hand, the requirements actually appear to be related to equipment requiring dedicated circuits. See Clause 2.7 for EN60950 and Clause 2.7 and the NAE of UL1950/CSA950. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Jody Leber [SMTP:jle...@ustech-lab.com] Sent: Sunday, March 12, 2000 11:06 PM To: 'wo...@sensormatic.com'; emc-p...@majordomo.ieee.org Subject:RE: Short-circuit Protection Richard, I believe the concern is for products that are shipped with a junction box not a power supply cord. For example, we approved a Kiosk that was provided with a junction box and no power cord. The installer (electrician) was required to size the breaker and mains wiring. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: wo...@sensormatic.com [SMTP:wo...@sensormatic.com] Sent: Friday, March 10, 2000 3:18 PM To: emc-p...@majordomo.ieee.org Subject:Short-circuit Protection According to Clause 1.7.11 of the 60950 clones, for equipment that is permanently wired and relies upon the building installation for short-circuit protection, . . . the equipment installation instructions shall so state and shall also specify the requirements for short-circuit protection or over-current protection, where necessary, for both. All certified beakers have a specified breaking capacity and the building wiring is sized for that protection. I understand that the compliant equipment's internal wiring, and where allowed, permanently connected power cord will withstand the short-circuit currents allowed by the certified external breakers. So, it is unclear to me that any additional specifications, including a current rating, are required other than stating that the protection is required. What statements are you making in your instructions to comply with this requirement? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Short-circuit Protection
Richard, I believe the concern is for products that are shipped with a junction box not a power supply cord. For example, we approved a Kiosk that was provided with a junction box and no power cord. The installer (electrician) was required to size the breaker and mains wiring. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: wo...@sensormatic.com [SMTP:wo...@sensormatic.com] Sent: Friday, March 10, 2000 3:18 PM To: emc-p...@majordomo.ieee.org Subject:Short-circuit Protection According to Clause 1.7.11 of the 60950 clones, for equipment that is permanently wired and relies upon the building installation for short-circuit protection, . . . the equipment installation instructions shall so state and shall also specify the requirements for short-circuit protection or over-current protection, where necessary, for both. All certified beakers have a specified breaking capacity and the building wiring is sized for that protection. I understand that the compliant equipment's internal wiring, and where allowed, permanently connected power cord will withstand the short-circuit currents allowed by the certified external breakers. So, it is unclear to me that any additional specifications, including a current rating, are required other than stating that the protection is required. What statements are you making in your instructions to comply with this requirement? --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
RE: Disconnect Device
Richard, Article 100 of the National Electrical Code (NEC) defines Readily Accessible as follows: Capable of being reached quickly for operation, renewal, or inspections, without requiring those to whom ready access is requisite to climb over or remove obstacles or to resort to portable ladders, etc. I do not have a copy of the Canadian Electrical Code, but suspect the requirements to be similar. Considering the number of lawyers in the US, this definition should be adequate for the rest of the world. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: wo...@sensormatic.com [SMTP:wo...@sensormatic.com] Sent: Thursday, March 09, 2000 11:08 AM To: emc-p...@majordomo.ieee.org Subject:Disconnect Device Clause 1.7.2 of IEC 60950 and its clones requires the installation instruction to state that permanently connected equipment must have a readily accessible disconnect device incorporated in the fixed wiring if the equipment does not have a disconnect device. What is the criteria for assessing if the disconnect device is readily accessible? Richard Woods --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
UL1950 Listed Modems
We are attempting to complete UL 1950 3rd Edition Listing on a personal computer with a Listed modem from another vendor. According to UL, the computer may not be Listed to UL1950 3rd Edition since the other vendors modem was only approved to UL 1950 2nd Edition. Does this mean after April 1, 2000 computer manufacturers will not be able to supply their computers with Listed modems? From my experience most modems have been approved to UL 1950 2nd Edition. Has anyone run into this situation with UL and how was it resolved. Also, is anyone aware of any internal modems Listed to UL1950 3rd Edition? Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. 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: Jim Bacher: jim_bac...@mail.monarch.com Michael Garretson:pstc_ad...@garretson.org For policy questions, send mail to: Richard Nute: ri...@ieee.org
Part 68 Training
We have a new engineer learning Part 68/IC CS-03 that we would like to enroll in a seminar or training course. Is anyone aware of any seminars or training courses for Part 68/IC CS-03. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508
Puerto Rico
Does anyone know if Puerto Rico requires anything different than the US for telephone compliance? Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Acceptance of ENs for the OJ
Richard, Try http://www.cenelec.be/faq/hp_faq.htm for details. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: WOODS, RICHARD [SMTP:wo...@sensormatic.com] Sent: Monday, October 11, 1999 4:57 PM To: 'emc-pstc' Subject:Acceptance of ENs for the OJ Exactly who makes the determination that an approved EN is acceptable for demonstrating compliance with essential requirements of a directive and will therefore be published in the OJ? - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: US Circuit breaker requirements
Paul, I believe the requirement is related to flammable liquids such as gasoline and LP gas. For example in gas stations electrical components are typically installed at least 18 above the ground. Additionally, my hot water heater at home is on an 18 stand. The NEC covers some of the requirements in Art. 500 through 555. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Paul Smith [SMTP:phsm...@excite.co.uk] Sent: Tuesday, August 31, 1999 8:56 AM To: emc-p...@majordomo.ieee.org Subject:US Circuit breaker requirements Could somebody dispel an 'urban myth' for me. UL 891 states that circuit breakers in Dead Front Switchboards shall be placed no higher than 6 1/2 foot (2 metres) from the base of the rack they are installed in. Thats fine and I can find the references fine in the UL specification. But, I am told that they can be placed no lower than 6 inches (or possibly even 18 inches) above the base of the rack they are installed in. This is the 'myth' I need some information on. I've read UL 891 but haven't found any reference to this matter in it (or if I did my brain was switched off at that point). What is the requirement for the minimum mounting height for circuit breakers in Dead Front Switchboards? Is it covered by UL891, or is it hiding in the NEC regulations? Any ideas? Paul Excite -- Control Yourself. This E-mail brought to you by Excite's free E-mail service. Get your own E-mail address at http://www.excite.co.uk - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: NEMA 4 cabinet questions
-Original Message- From: JENKINS, JEFF [SMTP:jeff.jenk...@aei.com] Sent: Thursday, August 12, 1999 3:09 PM To: 'emc-p...@ieee.org' Subject:NEMA 4 cabinet questions Some questions about using a NEMA 4 cabinet: (1) Is the environment inside the cabinet considered pollution degree 1, no matter what the external environment is? I believe Pollution Degree 1 is intended for potted or encapsulated parts (2) We need to install a water drain at the bottom of the cabinet. Can we use a positive-acting valve without violating the cabinet's NEMA 4 rating? As long as it meets the requirements in UL 50 or the equivalent NEMA standard (3) The cabinet doors will need to be opened periodically for maintenance. How does this affect the pollution degree inside the cabinet? If dust or other pollution is present when the doors are open, I suspect Pollution Degree 3 would apply By the way, these questions are in the context of certifying the product under the CB 950 scheme. You may want to concentrate on an IEC 60529 IP rating for international use. The Certification Body should be able to advise you of any specific country deviations. Thanks, Jeff Jenkins Advanced Energy Industries, Inc. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: WEEE Directive
Doug, Try contacting Chris Robertson of ERA chris.robert...@era.co.uk 44 0 1372 367134 or Graham Adams of Motorola 44 0 1462 731580 Both of these individuals have written articles on the subject. I believe the proposed date is January 1, 2004. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: POWELL, DOUG [SMTP:doug.pow...@aei.com] Sent: Monday, August 02, 1999 8:01 PM To: EMC-PSTC (E-mail) Subject:WEEE Directive Hello group, This may be off-topic, then again it maybe not. It is regulatory for electronic equipment. I currently have a copy of the second draft of the Proposal for a directive on waste from electrical and electronic equipment. Now I have done a fair amount of searching about this and located a number of pages to review on the Eur-Lex website. But I still am not sure what the impact is for my company. It appears that manufacturers will eventually be required to provide a free service for recycling their obsolete products. Does anyone know if and when this goes into force. And if this comes about what are the implications to manufacturers who import their products into the European Community. What is the appearance of this symbol described as a crossed-out wheeled bin? What notifications are required in user documentation? Is there a requirement to either provide or contract recycling centers? Thanks for any help, -doug === Douglas E. Powell, Compliance Engineer Advanced Energy Industries, Inc. Fort Collins, Colorado 80525 USA --- 970-407-6410 (phone) 970-407-5410 (e-fax) mailto:doug.pow...@aei.com mailto:doug.pow...@aei.com http://www.advanced-energy.com http://www.advanced-energy.com/ === - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: 10 N force Test on Internal Components Prior to Overvoltage Tests
If the test is failing due to reduced spacings would that not already be considered non compliant by Clause 2.9? If this is not the case, applying the force prior to the overvoltage test may be considered a double fault condition. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Peter Merguerian [SMTP:pe...@itl.co.il] Sent: Monday, July 19, 1999 3:52 PM To: emc-p...@ieee.org; t...@world.std.com Cc: ico...@itl.co.il; al...@itl.co.il; sgn...@itl.co.il; zoh...@itl.co.il; plei...@itl.co.il Subject:10 N force Test on Internal Components Prior to Overvoltage Tests Dear All, For IEC 950/UL1950, there is a requirements that before measuring spacings, a 10 N force test is required on internal components. However, there is nothing under the UL/CSA 1950 Overvoltage Tests (for telecom interfaces connected to exposed plant) which requires a similar test prior to conducting the tests. It seems very reasonable to apply the 10 N force on internal components (to simulate manufacturing tolerances and/or rough handling in the field) prior to conducting the Overvoltage Tests. I have seen telecom cards fail the test after a 10 N force is applied to internal components and pass the test without the Force Test. Question: Has anyone else encountered the same phenomenon? Question: What does everyone feel; should a 10 N force test be conducted prior to the Overvoltage Tests? Thanks in Advance, PETER S. MERGUERIAN MANAGING DIRECTOR PRODUCT TESTING DIVISION I.T.L. (PRODUCT TESTING) LTD. HACHAROSHET 26, P.O.B. 211 OR YEHUDA 60251, ISRAEL TEL: 972-3-5339022 FAX: 972-3-5339019 E-MAIL: pe...@itl.co.il Visit our Website: http://www.itl.co.il - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Inherently Limited power source..
-Original Message- From: Art Michael [SMTP:amich...@connix.com] Sent: Friday, July 09, 1999 9:55 AM To: emc-p...@ieee.org Cc: Sparacino,George Subject:Re: Inherently Limited power source.. Hello George, An Inherently Limited power source is one in which the impedance of the source, typically a transformers' primary or secondary, is such that the available output is limited within the constraints of low energy as defined by a standard. UL 1585, for example, describes the limits/requisites for such a trafo design and the means for determining the power available. There is also an IEC standard for such transformers, but it's number does not come to mind at this instant. I'm certain someone else on this listserver can provide that bit of info. I also believe that if a non-accessible, non-replaceable current limiting device (film-resistor, fuse or ptc, for example) is housed within the transformer, the output can also be determined to be Inherently Limited. For UL 1310 (Class 2 Direct Plug In) an automatic reset device (ie. PTC) will not qualify as Inherently Limited. My experience with UL is that fuses are normally preferred for Inherently Limited if the xfmr is not designed as Art described. what Standard are you evaluating to? IBTW, I believe the IEC Standard is 61558-2-6. Also, if considering an Inherently Limited power source, other than a transformer, the same principles apply. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 Regards, Art Michael * * * * * * * * * * * * * * * * * * * * * * * International Product Safety Bookshop * * Check out our current offerings! * *Save 25% on the NEW EMC Encyclopedia * * * * http://www.safetylink.com/bookshop.html * * * * Another service of the Safety Link* * www.safetylink.com * * * * * * * * * * * * * * * * * * * * * * * On Fri, 9 Jul 1999 sparaci...@andovercontrols.com wrote: Hello all, The standard that I'm working with states under Power Limited Circuits that: an Inherently Limited power source does not require overcurrent protection, while a Not Inherently Limited power source does require it. Could someone give me an explanation of what makes a power source Inherently Limited.. Thank You, George - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Physical Security in Euope for ATMs
Does anyone know if there are any physical security requirements or standards for ATMs in Europe? UL 291 is the US version. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Request for Environmental Chamber Info for North American Market
I have had good luck with Thermotron and have not been very happy with Tenney or Cincinnati Sub Zero. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Kevin Harris [SMTP:harr...@dscltd.com] Sent: Wednesday, May 12, 1999 12:03 PM To: EMC-PSTC (E-mail) Subject:Request for Environmental Chamber Info for North American Market Hi Folks, Well it is time for me to get a new environmental chamber. I need a unit with temperature and humidity control and also automated control from a computer. We are looking for a capacity in the 8 cubic foot range. Does anyone have some manufacturer names and model numbers for a chamber they have used and liked or perhaps some info on units to stay away from (perhaps it would be better for the second part to be offline). Thank you Best Regards, Kevin Harris Manager, Approval Services Digital Security Controls 1645 Flint Road Downsview, Ontario CANADA M3J 2J6 Tel +1 416 665 8460 Ext. 2378 Fax +1 416 665 7753 email: harr...@dscltd.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, jim_bac...@monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: EnergyStar..
Try starting at http://www.epa.gov/energystar/ Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Sparacino,George [SMTP:sparaci...@andovercontrols.com] Sent: Thursday, April 22, 1999 11:56 AM To: 'emc-p...@majordomo.ieee.org' Subject:EnergyStar.. Greetings to the Group, I am seeking information about the EPA Energy Star Program in regards to product design requirements and general administrative processes. We are investigating the feasibility of complying to these requirements for purpose of putting the EPA Energy Star marking label on our intelligent building control products. Specifically, VAV and Lighting Controllers. Any guidance on what the requirements are and how to get started will be very much appreciated. Sincerely, George Sparacino Senior Compliance Engineer - Andover Controls. 1-978-470-0555 ext. 335 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Is there any correlation between VW-1 wire and UL 94 V-1 ?
Terry, If you step back in the list it specifically allows openings in the bottom of any size under: PVC, TFE, PTFE, FEP and neoprene insulated conductors and their connectors Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: Terry Meck [SMTP:tjm...@accusort.com] Sent: Tuesday, March 30, 1999 12:52 PM To: emc-p...@majordomo.ieee.org Subject:Is there any correlation between VW-1 wire and UL 94 V-1 ? Hello: I have a question about the interpretation of UL 1950 / En 60950 sec 4.4.6 Fire enclosure construction. The following constructions are considered to satisfy the requirement without test: openings in the bottom, each not larger than 40 mm sq under: @ components of FLAMMABILITY CLASS V-1 or better, or FLAMMABILITY CLASS HF -1 or better, or @ parts made of material of FLAMMABILITY CLASS V-1 or better, or FLAMMABILITY CLASS HF -1 or better; Is there any correlation between VW-1 wire and UL 94 V-1 FLAMMABILITY CLASS ? That is to say if all parts are V-0 or V-1 and wires of VW-1 would this construction be considered to comply? What is the best way to get information on the various wire classes UL 1581, 1180, 3239 etc. Your input is appreciated! Terry J. Meck tjm...@accusort.com - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
Jamaica
Are there any regulatory required for Jamaica? Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Network Equipment and UL 1459/1950
We just completed an approval with the exact same situation. I cannot speak for your prodcut since I have not reviewed it. I can provide a contact at UL if required. One of the big concerns is the R/C connectors normally used for bringing the lines in do not even meet UL1950 unless pins are skipped. Best Regards, Jody Leber jle...@ustech-lab.com http://www.ustech-lab.com U. S. Technologies 3505 Francis Circle Alpharetta, GA 30004 770.740.0717 Fax: 770.740.1508 -Original Message- From: j...@aol.com [SMTP:j...@aol.com] Sent: Wednesday, March 24, 1999 3:42 PM To: emc-pstc; 'TREG' Cc: jim.wi...@adtran.com Subject:Re: Network Equipment and UL 1459/1950 In a message dated 3/24/99, jim.wi...@adtran.com writes: The only design criteria with regard to insulation in Bellcore standards or UL 1459 is a hi-pots test. Creepage and clearance do not exist in traditional C.O. equipment (just look at wire wrapped backplanes). Dear Jim and others: Jim Wiese has raised several concerns regarding the transition from UL 1459 to UL 1950 (3rd Edition). One of these concerns relates to the new creepage and clearance requirements for separation of TNV circuits and ground/SELV. I would like to pick up on this one issue (I know that Jim has raised several other issues as well). In particular, I would like some feedback from others in the group regarding my interpretation of how the separation requirements in UL 1950 apply to certain types of equipment. Just this week I met with a PBX manufacturer who is in the process of re- designing the backplane and all of the line cards in their PBX to comply with UL 1950. The PBX is presently approved to UL 1459, but the manufacturer has its eye on the March 2000 date for new or modified products to comply with UL 1950. Needless to say, the redesign effort is an expensive one. The biggest headache in the redesign is complying with the creepage and clearance distances for separation of TNV and SELV circuits. The PBX manufacturer seemed incredulous when I stated that I did not think the creepage and clearance requirements applied to their product, since the PBX has a permanent (hardwired) connection to ground. My interpretation is based primarily on the following statement in clause 6.2.1.2 in UL 1950, paraphrased below: Basic insulation is not required provided that all of the following conditions are met: - the SELV circuit is connected to protective earth...in accordance with 2.5; and - the installation instructions specifya permanent connection to earth; and - the test of 6.2.1.3 is carried out... (where applicable) There are other clauses that call out isolation, such as 6.3.3.1 and 6.4.1, but the permanent ground exemption appears to apply here as well. In my view, these exemptions are specifically targeted at equipment such as PBXs and network equipment that are typically installed by service personnel and include hardwired grounding. Without these exemptions, it is almost impossible to separate certain types of TNV circuits from SELV and ground. For example, a feed circuit that provides 48V battery (SLIC, FXS, DID, etc.) is inherently referenced to ground. The situation with a ground-start FXO interface is not much better. Do others in the group agree with this interpretation? If not, how are feed circuits supposed to be isolated? Does anyone have direct experience with getting a product through UL with these exemptions? I recognize that the original thread here related to network equipment, but the permanent ground exemption should apply to network equipment as well. I also recognize that these exemptions only apply to circuits that qualify as TNV, and do not address some of the other issues that Jim Weise raised concerning things like 200 volts DC for repeaters. However, for simple TNV isolation, it seems that network equipment could use the permanent ground exemptions from having to provide creepage and clearance (or in fact, any isolation at all). Any input from others in the group would be welcome. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 (USA) - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.org with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, j...@gwmail.monarch.com, ri...@sdd.hp.com, or roger.volgst...@compaq.com (the list administrators).
RE: Info on ballast requirements
-Original Message- From: Muriel Bittencourt de Liz [SMTP:mur...@inep.ufsc.br] Sent: Tuesday, September 01, 1998 2:41 PM To: Lista de EMC da IEEE Subject:Info on ballast requirements Hello All I'd like to know if there's any international standard for ballasts to be EMC compliant. The standard is restrictive? Is there any difference between CE standards or FCC standards? The only two Standards I am aware of are EN55015 and EN61547. EN61547 references the 1000-4 group of Standards. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services 11940 Alpharetta Highway Suite 103 Alpharetta, GA 30004 770.772.4299 Fax: 770.772.4297 - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators).
RE: Bunsen Burner
Try a laboratory supply house such as Cole-Parmer, (800)323-4340. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services 11940 Alpharetta Highway Suite 103 Alpharetta, GA 30004 770.772.4299 Fax: 770.772.4297 -Original Message- From: GOEDDERZ, JIM [SMTP:goedd...@sensormatic.com] Sent: Wednesday, August 12, 1998 7:04 PM To: 'PSnetPost' Subject:Bunsen Burner Does anyone have a source for the Bunsen burner required for the flammability testing of Appendix A, IEC950? Thank you James Goedderz Sensormatic Electronics goedd...@sensormatic.com Views expressed by the author do not necessarily represent those of Sensormatic. - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators). - This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to majord...@ieee.com with the single line: unsubscribe emc-pstc (without the quotes). For help, send mail to ed.pr...@cubic.com, ri...@sdd.hp.com, or roger.volgst...@compaq.co (the list administrators).
Re: Converting IEC symbols to fonts
At 05:27 PM 4/1/98 -0800, you wrote: We frequently want to use some standard IEC symbols in our manuals, and we have some of them in some sort of graphic format (I'm not sure which one). We also use things like agency marks, our product or company logos, electrical symbols, etc, in manuals, product literature, and internal documents. What would it take to convert symbols to characters in a font set, so that inserting them in a Word document would be as simple as changing the font and hitting the right key? I may be missing something, but saving the image into clipboard from paintbrush (or other drawing program) and pasting it into the document is one simple way. Does anyone out there know how to turn a .bmp, .gif, .tif, etc into a character in a font, and how to create a new font-set? Is this built in to Word or Windows, or available as some sort of after-market font-creation software package? Any help that anyone can offer will be most appreciated. Thanks. Regards, Jim Eichner Statpower Technologies Corporation jeich...@statpower.com http://www.statpower.com Any opinions expressed are those of my invisible friend, who really exists. Honest. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
IEC 1000-3-2, -3
To all, I am interested in purchasing a power analyzer and AC source for IEC 1000-3-2, -3 testing. Does anyone have experience (good or bad) with the commercially available units? Please e-mail me privately if you do not wish to publicize your comments. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
UL 1950, Clause 3.2
To all: Clause 3.2.1 requires an attachment plug rated for 125% of the rated current of the equipment, which additionally coincides with the NEC section 210-22. This would imply that a power tap listed under UL 1950 (contains other control circuits) could only be rated 12 A. Relocatable Power Taps (UL 1363) are commonly rated 15 A and Listed by UL at that rating. Anyone know why these items would be treated differently? Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
Re: Latest EN Standards
Date: Thu, 03 Apr 1997 08:24:29 -0500 To: barron_ma...@tandem.com From: Jody Leber j...@ltgservices.com Subject: Re: Latest EN Standards At 11:50 PM 4/2/97 +1600, you wrote: ma The following standards apply to the noted product types: ITEM EMISSIONSIMMUNITY #1EN55013 EN55020 #2EN55014 EN50082-1 What about EN 55104 for appliance immunity? Sincerely, Manny Barron Tandem Computers om, lp...@mail.arc.nasa.gov, ltran@SENT 04-02-97 FROM SMTPGATE (rldxa...@hk.super.net) Can anyone advise me the latest EMC EN standards for the following categories in order to comply with Council Directive 89/336/EEC. 1. Sound television broadcast receivers and associated equipment, i.e., radios, televisions, audio/video combination units. 2. Household electrical appliances, i.e., hairdryers, fans, fan heaters. Thanks and regards, Raymond Li Dixons Stores Group Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
Re: LVD and 48VDC equipment
At 01:31 PM 2/12/97 -0500, you wrote: I would appreciate your comments on the following thoughts/philosophy: The scope of the Low Voltage Directive excludes equipment with a voltage rating (means powered from) -48VDC (or -48 to -60VDC) sources (including ITE/Telecom equipment.) [Definition from EN60950 - Rated Voltage: The primary power voltage as declared by the manufacturer.] If the equipment is ITE, it is included in the scope of EN60950. EN60950 has no lower voltage limit and specifically includes equipment intended to be connected to a telecommunications network. If the equipment is ITE and not Telecom, the equipment could be tested to EN60950 as this is a relevant standard. Of course the equipment must be CE marked persuant to the EMC directive. The Declaration of Conformity (DOC) should refer to the EMC directive, but not the Low Voltage Directive. On what basis would you test to EN 60950 since it is referenced in the LVD? Possibly the General Product Safety Directive? Please clarify. If the equipment is ITE/Telecom hybrid, the TTE directive requires (Article 4) that the equipment satisfy requirements for user safety and safety of employees of public telecom networks operators. It also requires that the equipment satisfy requirements for the protection of the public telecom network from harm. Whether the LVD applies or not, safety is required. Therefore equipment should be tested to EN60950 as this is the relevant standard. CE marking would be required for the TTE and EMC directives, but not the LVD as the DOC would show. Same questions from above. In conclusion, 48VDC ITE/telecom equipment should be tested to EN60950, but CE marking, and the associated DOC, should not include reference to the LVD. Thanks, R. Grant Pinto grant.pi...@adn.alcatel.com Certification Engineer Alcatel Data Networks 703-724-2759 703-724-2132-fax Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
Requirements for Brazil
Hello All, Is anyone familiar with EMC and Product Safety requirements in Brazil. Please provide any Standards, government contacts or anything else of relevance. Thanks in Advance. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
Fastener Quality Act
To all, I recently saw a short (emphasis on the short!) article in the January 1997 issue of BSI's magazine, Business Standards about the U.S. Fastener Quality Act which will become effective on May 27th, 1997. Unfortunately, there wasn't much more information beyond that, and I was wondering if anyone in the group can enlighten me further or set me in the right direction for an intelligent search. My main concern is just how wide a range of products it will cover. Thanks. Sincerely, Frank Goto Try the following: FQA Program, Room 311, Building 820, NIST Gaithersburg, MD 20899-0001 Subhas Malghan (301)975-4500 malg...@nist.gov Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
NFPA 70 - National Electric Code
Bob, Generically, your assuptions are correct. You did not mention if the equipment was a standard PC (home, possible business) or if the interconnecting cables would be supplied by you. Most PC's don't have any special requirements for outputs (ISA, VL, PCI Bus) that are not derived from the 12 or 5 volt supply (signal outputs from IC's) such as a printer or mouse. The only issue I have experienced was concerning a keyboard connection that connected to the 5 Volt, 20 Amp output of the power supply that was not fused. We had to provide a fuse to limit the output to Class 2. If you are dealing with a large mainframe computer the requirements are in line with your comments. Jody Leber j...@ltgservices.com Hello, I am trying to understand the relationship between IEC950 (US/CSA deviations) and NFPA 70 in regards to what I believe would be defined as interconnecting cables. In particular, I am looking at the circuit between a device port on the system and the external device which connects to that port. I am not considering direct connection to telecommunications, but interface connections to devices such as printers, scanners, and other things which exist. Assume that these products are desktop or deskside. They are not in a computer room. It appears that UL/CSA section 3 covers this and either the circuit meets the limited power source requirements of tables 8 or 9 section 2.11 or it must be shown through abnormal testing that no hazard exist under single fault conditions. Do you agree? Table 8 and 9 come from Article 725 of the NEC for Class 2 and Class 3 circuits. If the limits of these tables are not met, what does that mean as far as the NEC is concerned. Does it simply mean the circuit is not Class 2 or 3? I hope this makes some sense. If not ask some questions and I will see if I can clarify what I am asking for. Regards, Bob Brister Digital Equipment Corp. Corp. EHS Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
CE Requirements
Is anyone familiar with EN 61131-2 and the EMC directives it encompasses? I know the EMC directive is addressed and would like to know if EN 61131-2 includes the test requirements or points to other standards. Regards, Jody Leber j...@ltgservices.com http://www.ltgservices.com LTG Services Suite 103 11940 Alpharetta Highway Alpharetta, GA 30201 (770)772-4299 Fax: (770)772-4297
