RE: Bonding Impedance
Hello all, Didn't get many responses to this but I want to pass some information on regarding why 25 Amps was selected as the default test current. Apparently this is a legacy value from the UK when 12 amp circuit breakers were being used as mains breakers. A guess that 2 x 12 rounds up nicely to 25. However, it is my understanding that 12 amp mains breakers are no longer used in the UK. Can someone please verify this? Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ -Original Message- From: ron_well...@agilent.com [mailto:ron_well...@agilent.com] Sent: Wednesday, July 24, 2002 1:58 PM To: emc-p...@majordomo.ieee.org Subject: Bonding Impedance Hello all, I recent issue has come up for me regarding why some safety standards specify 100 milliohms as the acceptable impedance for a protective earth ground bonding test. I am curious as to what the rationale is for this specific value and why 25 amps is chosen as the default test current. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 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: 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
RE: NEC Question
Hello Ron, Yes, as you said. Burden was a poor choice of words. In regards to your second query, as a matter of doing business, it is always in a manufacturer's best interest to know what regulations apply to the use of their products in the hands of their Customers. Having compliant product already available is advantageous to the supplier. However, if a Customer does not require NRTL listing of a product, so be it. Just because you are not listed with an NRTL doesn't mean that your product is unsafe. Also, it is not up to a manufacturer to decide what a workplace is under OSHA regulations, the Customer decides this because the applicable workplace regulations apply to them. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Ron Pickard [mailto:rpick...@hypercom.com] Sent: Wednesday, March 20, 2002 12:57 PM To: ron_well...@agilent.com Cc: emc-p...@ieee.org Subject: RE: NEC Question Hi Ron, You wrote: The burden of having products listed by an NRTL, like UL, falls on the purchaser of the product if the product is used in a workplace which is subject to OSHA regulations. To which OSHA regulation are you specifically referring to to make this statement? Its inconceiveable that a purchaser (customer?) be responsible for listing a supplier's product. Maybe you intended to say that, for products used in the workplace, it is the purchaser's responsibility to ensure that products installed under the purchaser's control be compliant to OSHA regulations. Anyway, please explain your statement above. Most non-IT product manufacturers do not get their products listed unless a Customer specifically requires it. In some cases, a product may get listed because it is expected that a product will be marketed in a known jurisdiction that requires listed products by an NRTL. The State of Oregon and the City of Los Angeles are a couple examples. If a product, non-IT or otherwise, is to be used in the workplace (OSHA jurisdiction), your statement appears to contradict OSHA regulation, 29CFR Part 1910.399. Please advise. I look forward to your reply for clarification. Best regards, Ron Pickard rpick...@hypercom.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...@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
RE: Japan mains voltage
The attached GIF image shows frequency allocation in Japan. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com http://www.agilent.com/ | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Darren Pearson [mailto:dar...@genesysibs.com] Sent: Wednesday, February 20, 2002 4:46 AM To: emc-p...@ieee.org Subject: Japan mains voltage Can anyone tell me what the mains voltage is in Japan, I think it is 110V but I do not know the frequency. apart from this, does any one know of a web site that gives information about the mains voltage and frequency of various countries ? Regards Darren. Darren Pearson Radio Telecom Approval Services Genesys Singleton Court, Wonastow Road Monmouth, NP25 5JA UK Tel: +44 1600 710300 Fax: +44 1600 710301 email: dar...@genesysibs.com mailto:dar...@genesysibs.com web: www.genesysibs.com http://www.genesysibs.com attachment: pwr-f.gif
RE: Teslars???
I did a search on Hotbot to see what a Teslar is. Some interesting references come up about watches and protection against EMFs. Here is an example: http://www.lessemf.com/schumann.html Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: marti...@appliedbiosystems.com [mailto:marti...@appliedbiosystems.com] Sent: Thursday, February 07, 2002 2:22 PM To: emc-p...@majordomo.ieee.org Subject: Teslars??? We have a customer that is concerned about how our product, laboratory equipment, will respond to electromagnetic disturbances from a high speed train that runs close to their lab. The customer states that the disturbance will be around 0.7-1.2 m Teslar. Can someone please explain what the unit Teslar is and how that unit relates, or if it relates, to the immunity tests of EN 61000-4-3 Radiated immunity, or any other immunity test. Has anyone ever had a similar concern from a customer dealing with this type of disturbance? Your responses are appreciated. Regards Joe Martin EMC/Product Safety Engineer 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...@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 --- 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
RE: Power Supply Cord Plug for Saudi Arabia
There is a SASO standard for power outlets and plugs. However, I do mot have the standard number readily available. But, I do know that the standard references the UK BS 1363 plug and the US NEMA 5-15 plug. Also, to the best of my knowledge, there are no mandatory Saudi approvals required for power cords or cord sets. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Luiz Claudio Bonilla de Araujo [mailto:luizboni...@ig.com.br] Sent: Wednesday, January 30, 2002 1:17 PM To: emc-p...@majordomo.ieee.org Subject: Power Supply Cord Plug for Saudi Arabia Hi friends, Can anybody inform which are the power supply cords required to be used in household appliances sold in Saudi Arabia? I know that British fused plugs are used there (for 220V/60Hz), but I want to know if this is a regulatory requirement. BTW, class OI or class II appliances are acceptable for selling there? Any comments will be highly appreciated. Regards, Luiz _ Oi! Você quer um iG-mail gratuito? Então clique aqui: http://registro.ig.com.br/ --- 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. --- 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.
RE: European and North American Cordage
Howdy all, Having been involved with power cords and cord sets for quite some time I have never seen an advantage in using Universal cordage. Therefore, I would be interested to hear from people what they have to say about their usage of Universal cordage and what they have benefited from using it. I am specifically interested in certification and material costs when using Universal cordage versus HAR or UL/CSA certified cordage. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: jrbar...@lexmark.com [mailto:jrbar...@lexmark.com] Sent: Monday, January 07, 2002 2:21 PM To: Peter Merguerian; emc-p...@majordomo.ieee.org Subject: Re: European and North American Cordage Peter, We used a HARSVT 3x18AWG 1.00mm2 Universal linecord from Feller on the Lexmark MarNet XLe External Network Adapter. This had a Harmonized plus UL/CSA-listed cordage. I can't find my Feller catalog right now, and their website (http://www.feller-at.com/ ) doesn't say, but I think that they had HARSVT cordage in 16AWG and 14AWG, along with HARSJT cordage. John Barnes Advisory Engineer Lexmark International --- 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. --- 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.
RE: Cadmium levels?
Check the following URL: http://europa.eu.int/eur-lex/en/lif/dat/1991/en_391L0338.html regarding EU Council Directive 91/338/EEC. Not knowing the whole story, it is possible that Cadmium based pigments were used in the cables or a Cadmium based stabilizer was used. There have been similar issues with Lead (Pb) in PVC cables here in California. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: wmf...@aol.com [mailto:wmf...@aol.com] Sent: Thursday, December 06, 2001 3:54 AM To: emc-p...@ieee.org Subject: Cadmium levels? Which regulation applies in this story? How does one know if their cadmium levels are too high? What is the cadmium risk? http://dailynews.yahoo.com/h/ap/20011205/tc/japan_sony_3.html Thanks Wm Flanigan Standards Engineer Ameritherm Inc 39 Main Street Scottsville, NY 14546 bflani...@ameritherm.com 1.716.889.9000 1.716.889.4030 (fx) --- 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. --- 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.
RE: Power Cord Length
Hello Luiz, Unless a specific standard specifies a length, there is no universal minimum or maximum length. However, depending on the length, some standards specify acceptable cross-sectional areas of the conductors for lengths below 2.0 meters (EN 60799) and above 15.2 meters (UL 817). If you are going to specify power cord lengths, I would go with what the power cord suppliers have off-the-shelf. Usually, these lengths are 6.0, 8.0 and 12.0 feet or 1.8, 2.5, and 3.6 meters. You should expect to get good delivery of these power cords because they are usually in stock and allows your supplier to manage your power cord inventory. Special lengths require scheduling special production runs and can extend the lead time in getting these power cords. As for price, it is always negotiable, depending on the volume you purchase. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com http://www.agilent.com/ | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Luiz Claudio [mailto:luizboni...@ig.com.br] Sent: Thursday, December 06, 2001 1:14 AM To: emc-p...@ieee.org Cc: luiz_c_boni...@multibras.com.br Subject: Power Cord Length Dear all, I am trying to identify requirements regarding the minimum and maximum power cord length used in household appliances. I found specific requirements in UL (min 1,5 m, max 2,5m) and SASO (min 2,0 m). But I couldn't find any information for other regions (Europe, Asia, South Africa, etc.) Does anybody have this kind of information? Thanks, Luiz Claudio Bonilla de Araujo Joinville - SC - BRAZIL
RE: IATA
http://www.iata.org/cargo/dg/ You want a copy of the Dangerous Goods Regulations. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: richwo...@tycoint.com [mailto:richwo...@tycoint.com] Sent: Monday, December 03, 2001 8:19 AM To: emc-p...@majordomo.ieee.org Subject: IATA I understand that there is an IATA standard that sets the magnetic field limit for a device being shipped in an aircraft. Can someone point me to a website that has this standard/limit? Richard Woods Sensormatic Electronics Tyco International --- 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. --- 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.
RE: Mains Cords in the UK and the fuse rating
I recommend that you get copies of BS 1362 and all parts of BS 1363 from BSI. You may also want to get a copy of EN 60799. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Chris Allen [mailto:chris_al...@eur.3com.com] Sent: Thursday, November 29, 2001 6:14 AM To: emc-p...@majordomo.ieee.org Subject: Mains Cords in the UK and the fuse rating For an IT product there is a restriction in the use of mains cords with a cross sectional area of 0.75mm2 for units up to 6 amps when the cord is greater than 2m in length (EN60950: 2000 section 3.2.5) Can anyone tell me is there is a requirement (in any standard) specifying a maximum fuse rating that should be fitted to the plug of such a cord and what it is? Thanks in advance. Kind regards, Chris. --- 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. --- 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.
RE: skinny power cords.
In North America we rate cordage according to usage. The probability of crushing a cord is dependent on its usage and the selection of the cordage type by the manufacturer. I have seen many IT manufacturers use SVT cordage in North America. In my opinion SVT cordage is chosen instead of SJT just to save money. SVT is for vacuum cleaners, not consumer products. So, would fusing a plug in the USA/Canada be needed? I say no because we have a working system to rate cordage according to usage. If people choose to abuse the system, they assume the risk and liability for doing so. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Nick Rouse [mailto:100626.3...@compuserve.com] Sent: Friday, October 26, 2001 2:11 PM To: emc Subject: Fw: skinny power cords. - Original Message - From: Nick Rouse 100626.3...@compuserve.com To: WELLMAN,RON (A-PaloAlto,ex1) ron_well...@agilent.com Sent: Friday, October 26, 2001 9:52 PM Subject: Re: skinny power cords. Earlier on in the thread it was not about arcing across the pins of a plug but about the dangers or having a power cord rated lower than the protection in the supply. Damage to the cord such as squashing it under the legs of furniture or repeated flexing or overloads in simple unfused equipment like table lights can cause overheating in the cord that will not trip out the circuit protection. Fused plugs do allow thin power cords to be used safely from supplies that have a high rated current, In the UK power outlets are on a ring protected by a 30A or 50A fuse or breaker. Nick Rouse Original Message - From: WELLMAN,RON (A-PaloAlto,ex1) ron_well...@agilent.com To: emc-p...@majordomo.ieee.org Sent: Friday, October 26, 2001 3:05 PM Subject: RE: skinny power cords. Hello all, Earlier on in this thread it was eluded that this problem was leading to the need of fused power plugs, similar to what is done in the UK. However, based on the analyses of several people, I do not see how a fused plug would of prevented the failure that Robert experienced. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ --- 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. --- 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
RE: What's the Skinny on IEC60799 for Power Cords?
Power cord sets for the EU must be CE marked because of EN 60799, not EN 60950. Also, I know of one Austrian based power cord supplier that does this. The IEC/EN 60320-1 connector has the CE marking molded on it. As for a certification for EU compliant power cord sets, the supplier should have a Declaration of Conformity. Ask for it. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Lesmeister, Glenn [mailto:glenn.lesmeis...@compaq.com] Sent: Friday, October 26, 2001 1:01 PM To: emc-p...@majordomo.ieee.org Subject: What's the Skinny on IEC60799 for Power Cords? Sorry, a completely different issue. Can anyone explain the relevance of IEC60799 with respect to ITE detachable power supply cords? This standard is not referenced in IEC60950, however, it is in the OJ. I don't have this document, so I don't know what is specifically in the scope. I have always looked for a certification from power cord vendors for European cord sets, only to be told that they do not certify the assemblies. They only certify the components to IEC60227, IEC 60320 and the appropriate country plug standard. This has always been sufficient for the agencies, however, it seems to me that with the presence IEC60799 in the OJ, there would be no shortage of cord set certifications. The reason this has come up is that a certain cord set manufacturer is concerned about assembling a particular cord set that has an unusual combination of plug and connector rating/configuration and is citing 60799. I understand their concern because UL would never approve a cord set with non-matching NEMA configurations, however, I always understood IEC60320 as not being as hard lined about this. After all, you can get C14-C3, C5 or C7 adapters anywhere. If you reverse this, it's possible to create a hazard, however, I've seen these around and I don't know that they are illegal. Regards, Glenn Lesmeister Product Regulatory Compliance Compaq Computer Corp. Tel: 281-514-5163 20555 SH 249, MS60607 Fax: 281-514-8029 Houston, TX 77070-2698 Pgr: 713-786-4930 glenn.lesmeis...@compaq.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: No longer online until our new server is brought online and the old messages are imported into the new server. --- 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.
RE: skinny power cords.
Hello all, Earlier on in this thread it was eluded that this problem was leading to the need of fused power plugs, similar to what is done in the UK. However, based on the analyses of several people, I do not see how a fused plug would of prevented the failure that Robert experienced. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-553-2412 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-BB |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ --- 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.
RE: Voltage Range in Asia
Hello Luiz, When it comes to voltage ranges you are not going to get accurate information from any source other than the power utilities in those countries. However, depending on the power distribution network within a country the voltage ranges can be different from one municipality to another. The best way to address this issue is to determine what voltage tolerances you want to design into your product based on established nominal voltages around the world. Depending on how robust you want to make your product you may want to have a large tolerance range, say +/- 10% and type test your products to +/- 12%. Also, depending on your concern for safety versus performance, you may specify a tolerance range of +/- 5% and verify that if the voltage goes out of this range that the product remains safe even though its performance may be degraded. Another alternative is to specify a controlled voltage environment for your product. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-345-8630 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-SQ |WWW : http://www.agilent.com http://www.agilent.com/ | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Luiz Claudio [mailto:luizboni...@ig.com.br] Sent: Friday, June 22, 2001 2:29 AM To: emc-p...@majordomo.ieee.org Cc: luiz_c_boni...@multibras.com.br Subject: Voltage Range in Asia Dear Colleagues, I am trying to find reliable information regarding the actual voltage range found in some Asian countries. I already have some information, but it looks like the actual conditions are worse than those published. Since travelling to each country with a multimeter would be quite expensive, I would really appreciate if someone could give me some help. Specifically, I am looking for information about the following countries: Taiwan Thailand Philippines Hong Kong Singapore India Malaysia South Korea Thanks in advance for your kind attention. Regards, Luiz
RE: UL 3111-1 vs. UL 3101-1
Hello all, The reason why UL has split IEC 61010-1 into two standards (UL 3101-1 and 3111-1) has to do with the Instrument Society of America (ISA). The US National Standard for Laboratory Equipment has been owned by UL while the US National Standard for Test and Measurement Equipment has been owned by ISA. It turns out that ISA S82.01 is the US National Standard for TM Equipment while the last time a saw it, UL 3101-1 was in the process to become the US National Standard for Laboratoty Equipment, replacing UL 1262. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-345-8630 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 54L-SQ |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: acar...@uk.xyratex.com [mailto:acar...@uk.xyratex.com] Sent: Thursday, January 18, 2001 3:36 AM To: Veit, Andy Cc: emc-p...@majordomo.ieee.org Subject: Re: UL 3111-1 vs. UL 3101-1 Andy I use these two standards on a daily bases and you are right, they are pretty much identical. Yet to find a difference. UL3101-1 Electrical Equipment for Laboratory Use - General Requirements UL3111-1 Electrical Measuring and Test Equipment - General Requirements. UL3111-1 is the UL version of IEC1010 when it comes to electrical test equipment, e.g. a DVM. Do not ask me why UL in it's infinite wisdom thought they needed two identical standards Probably to make you two inspection fees on two Files. !!! Veit, Andy wrote: Folks- Can someone give the scope of UL 3111-1? Or tell me how is it's scope differs from UL 3101-1? I have a copy of UL 3101-1, and it appears that it is very similar to IEC 1010-1, but I don't have a copy of UL 3111-1 (yet!). I read a message in the IEEE-PSTC archive where someone said that UL created the standards 3111-1 and 3101-1 from IEC 1010-1, but there were no further details about how the standards differ. Thank you- -Andy Veit Andrew Veit Systems Design Engineer MTS Systems Corp Ph: 919.677.2507 Fax: 919.677.2480 1001 Sheldon Drive Cary, NC 27513 --- 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 -- Andrew Carson - Product Safety Engineer Xyratex Engineering Laboratory Tele 023 92496855 Fax 023 92496014 --- 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: EN61010-1 Question
Robert, You may want to take a look at IEC 61010-2-031 considering you are dealing with a probe. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-345-8630 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 51L-SQ |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: Loop, Robert [mailto:rl...@hnt.wylelabs.com] Sent: Tuesday, May 09, 2000 8:30 AM To: emc-p...@ieee.org Subject: EN61010-1 Question Group: A question on interpretation of Clause 6.3.1.1 and 6.3.1.2: If a product has an operator accessible cable that exits the equipment and operates normally at a level of 250 Vdc /200 uA, is it required to be marked with the hazardous voltage label? The cable is a probe where the user (a trained technician) could touch bare metal on the probe operating at the level noted. My thanks to those that respond. 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. 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: RE: Product Safety Certification School
Howdy all, I agree, there needs to be a curriculum available to teach product safety basics at the University level. However, to truly look at product safety the curriculum needs to focus on the application of engineering fundamentals to the design and analysis of provably safe products, not a standards compliance approach. Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-345-8630 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 51L-SQ |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: duncan.ho...@snellwilcox.com [mailto:duncan.ho...@snellwilcox.com] Sent: Tuesday, March 07, 2000 1:32 AM To: dirk_at...@yahoo.com; emc-p...@ieee.org Subject: Re:RE: Product Safety Certification School Dan,Rich Dick,Dirk and group. I would also aggree. years ago I served an apprenticeship with a major computer manufacturer and for my final year and a half chose to work in product safety. At the end of the apprenticeship I decided that I wanted to go to university and get a degree and I set out to find a Degree course with a product safety content. In the end I couldn't find one and ended up doing an electrical and electronics degree. The degree enhanced my electrical theory but there was no product safety content except for the presentation on product liability that I gave as part of an engineering managment module. I believe that it is fundamental that if designers are to design to meet standards they at least need to be taught the fundamentals of why the standards exist and their basic requirements. Perhaps this is somthing that the IEE or the IEEE should take up with the academic institutions, as I know that they have a lot of involvement in setting course sylabusses and accrediting degrees. Regards, Duncan Reply Separator Subject:RE: Product Safety Certification School Author: Dirk Atama dirk_at...@yahoo.com List-Post: emc-pstc@listserv.ieee.org Date: 3/6/00 6:00 PM Dan/Rich/Dick- My two pence: I agree, too, that a module of some basic power electronics courses could be a product safety lesson. We have hired new college graduates that had little inkling of what was of concern for product safety; often times they have a modicum of intuitive feel for products unsafe, but it takes a while to breed in the safety sense that we so often take for granted. I nominate Surrey-on-Trent Mines Engineer Technical College to spawn the first course. I'll call the headmaster and put a bug in his bum for the idea. Dr. Dirk -- We all spend time online; make some extra $$ free at http://www.alladvantage.com/go.asp?refid=EDL-665 -- --- Dick Grobner dick.grob...@medgraph.com wrote: My 2 cents: I agree, it would make my life easier in compliance engineering if the EE's ME's would have a little basic understanding of the concepts of product safety. It seems that they have a general knowledge of EMI/RFI but the product safety side is still missing. -Original Message- From: Rich Nute [mailto:ri...@sdd.hp.com] Sent: Friday, March 03, 2000 5:01 PM To: dan_mitch...@condordc.com Cc: emc-p...@majordomo.ieee.org Subject: Re: Product Safety Certification School Hi Dan: Last year, sometime, reference was made about the possible creation of a University program to teach Product Safety. I was wondering if anybody has heard anything further about this program? I probably was the one who mentioned that engineering schools should include a 1-term course in product safety. Its on my wish-list. I'd like to find even one engineering school that would consider such a course, and then I'd volunteer to help create the course. But, I believe that no engineering school currently has such a course. 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: 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
RE: Technical Files
Hello Brian, Could you please provide more information as to who is driving this? Regards, +=+ |Ronald R. Wellman|Voice : 408-345-8229 | |Agilent Technologies |FAX : 408-345-8630 | |5301 Stevens Creek Blvd.,|E-Mail: ron_well...@agilent.com| |Mailstop 51L-SQ |WWW : http://www.agilent.com | |Santa Clara, California 95052 USA| | +=+ | Common sense is the collection of prejudices acquired by age | | eighteen. - Albert Einstein | +=+ -Original Message- From: bharl...@vgscientific.com [mailto:bharl...@vgscientific.com] Sent: Wednesday, March 01, 2000 4:07 AM To: emc-p...@ieee.org Subject: Technical Files Just to throw an English two pennorth into this discussion There appears to be a move in the UK towards creating a single technical file in which you keep the records , test results drawings calculations etc for every directive that your product has to comply with. i.e Low voltage, emc, pressure equipment etc. The object being that should the worst happen you have a nice tidy document to show that you have shown due diligence which seems to be what the courts will be looking for. As other correspondents have stated this does not apply if you have chosen the TCF route for emc compliance Regards Brian Harlowe - 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 adminstrators: Jim Bacher: jim_bac...@mail.monarch.com, or 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
