Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
> From: Brian Oconnell > Sent: Tuesday, December 03, 2013 12:31 > To: EMC-PSTC@LISTSERV.IEEE.ORG > > But there are, in fact, listed CBs intended for supp > interrupt protect. I'm aware of UL Listed supplementary overcurrent protection fuses, but not CBs. What's the product category? Peter Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
When I mind meld it doesn’t work for them. Just me! Michael Sundstrom OHD TREQ Dallas Electronic Lab Analyst EMC Lead (214) 579 6312 office (940) 390 3644 cell マイク KB5UKT From: jral...@productsafetyinc.com [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 03, 2013 2:27 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary Thanks guys! I especially like to Vulcan Mind-meld On Dec 3, 2013, at 2:11 PM, "Peter Tarver" mailto:ptar...@enphaseenergy.com>> wrote: John - The simplest method is whether or not the breaker is Listed or Recognized. If it's Listed, it's suitable for branch circuit protection, within the caveats of the product category (some exceptions may exist, but should be detailed in the Listing). Recognized breakers are never suitable for branch circuit protection and are only suitable for supplementary protection applications, unless it's used as a part of a Listed assembly identified for use as branch circuit protection. QVNU2 "breakers" are not suitable for branch circuit protection. Regards, Peter Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe)<http://www.ieee-pses.org/list.html> List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas mailto:emcp...@radiusnorth.net>> Mike Cantwell mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher mailto:j.bac...@ieee.org>> David Heald mailto:dhe...@gmail.com>> - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
The UL standard for supplementary overcurrent protectors is UL 1077. UL does not have any products Listed to that standard and UL will not List products to that standard. UL only has Recognized products under UL 1077. You can find products under category code QVNU2, but there is nothing under QVNU. There are a number of different categories of products that UL certifies under UL 489. In general, those that are Listed are suitable for branch circuit protection and those that are Recognized might be if the Conditions of Acceptability are met. However, if an overcurrent protection device is Listed, it has been tested to UL 489, the circuit breaker standards and not UL 1077, the supplementary overcurrent standard. For more information, see the Marking and Application Guide<http://www.ul.com/global/documents/offerings/perspectives/regulators/electrical/newsletters/MoldedCaseCircuitBreakersMG.pdf>. Ted Eckert Compliance Engineer Microsoft Corporation ted.eck...@microsoft.com<mailto:ted.eck...@microsoft.com> The opinions expressed are my own and do not necessarily reflect those of my employer. From: jral...@productsafetyinc.com [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 3, 2013 12:29 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary So there are no UL Listed breakers that are only good for supplementary protection?? On Dec 3, 2013, at 2:26 PM, "Jim Morrison" mailto:jmorri...@qps.ca>> wrote: Hi John: If the device has a UL - , this would indicate approval to UL489 & suitable for a branch circuit device. If only marked - , the device would be approved to UL1077 and only recognized as a supplementary protector & not suitable for a branch circuit. Regards Jim Morrison C.E.T. C.E.I. Chief of Engineering / Vice President – Field Evaluations/Engineering | QPS Evaluation Services Inc. | 81 Kelfield Street, Unit 8, Toronto, Ontario, M9W 5A3 – OSHA Recognized NRTL Office (416-241-8857) | Cell ( 416-318-9104) | Fax (416-241-0682) | Toll Free ( 1-877-746-4777) | Website: www.qps.ca<http://www.qps.ca/> ; email jmorri...@qps.ca<mailto:jmorri...@qps.ca> -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: December-03-13 1:38 PM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary 1. UL 'White' book 2. UL marking guide for CBs 3. The particular standard used (489/1077/508x) 4. iaei.org<http://iaei.org> 5. mfr spec sheet 6. Vulcan mind-meld Brian From: jral...@productsafetyinc.com<mailto:jral...@productsafetyinc.com> [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 03, 2013 10:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary Hi, Is there a way to confirm if a CB is good for Branch Circuit Protection vs Supplementary by the markings on the device? Basically I want to be able to confirm in the field. I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The Listing mark vs Recognition mark would be the obvious one, but I'm told you can have Listed CB's that are not good for Branch Circuit Protection. I greatly appreciate the input. Thank you, John - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas mailto:emcp...@radiusnorth.net>> Mike Cantwell mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher: mailto:j.bac...@ieee.org>> David Heald: mailto:dhe...@gmail.com>> QPS Disclaimer This email may contain confidential or privileged information and is intended only for the use of the individual to whom or entity to which it is addressed. If you are not the intended recipient, or the person responsible for delivering the message to the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. I
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
So if there are UL Listed CBs only good for supplementary protection, back to my original questionwithout looking it up on UL's database, is there a way to confirm if it's supplemental or branch circuit. Thank goodness for nice people :-)!! > On Dec 3, 2013, at 2:34 PM, "Brian Oconnell" wrote: > > You people are much too nice and way too helpful. > Shall I provide dirtbag lessons (am fully qualified to instruct) on how to > answer questions without providing answer? > > But there are, in fact, listed CBs intended for supp interrupt protect. > > Brian > > From: Jim Morrison [mailto:jmorri...@qps.ca] > Sent: Tuesday, December 03, 2013 12:28 PM > To: jral...@productsafetyinc.com > Cc: EMC-PSTC@LISTSERV.IEEE.ORG; Brian Oconnell > Subject: Circuit Breakers - Branch Circuit Protection vs Supplementary > > Hi John: > If the device has a UL - , this would indicate approval to UL489 & suitable > for a branch circuit device. > > If only marked - , the device would be approved to UL1077 and only recognized > as a supplementary protector & not suitable for a branch circuit. > > Regards > > Jim Morrison C.E.T. C.E.I. > > Chief of Engineering / Vice President - Field Evaluations/Engineering | QPS > Evaluation Services Inc. | 81 Kelfield Street, Unit 8, Toronto, Ontario, > M9W 5A3 - OSHA Recognized NRTL > Office (416-241-8857) | Cell ( 416-318-9104) | Fax (416-241-0682) | Toll Free > ( 1-877-746-4777) | Website: www.qps.ca ; email jmorri...@qps.ca > > > -Original Message- > From: Brian Oconnell [mailto:oconne...@tamuracorp.com] > Sent: December-03-13 1:38 PM > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs > Supplementary > > 1. UL 'White' book > 2. UL marking guide for CBs > 3. The particular standard used (489/1077/508x) 4. iaei.org 5. mfr spec sheet > 6. Vulcan mind-meld > > Brian > > From: jral...@productsafetyinc.com [mailto:jral...@productsafetyinc.com] > Sent: Tuesday, December 03, 2013 10:13 AM > To: EMC-PSTC@LISTSERV.IEEE.ORG > Subject: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary > > Hi, > > Is there a way to confirm if a CB is good for Branch Circuit Protection vs > Supplementary by the markings on the device? Basically I want to be able to > confirm in the field. > > I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary > - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The > Listing mark vs Recognition mark would be the obvious one, but I'm told you > can have Listed CB's that are not good for Branch Circuit Protection. > > I greatly appreciate the input. > > Thank you, > > John > > - > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site at > http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used > formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas > Mike Cantwell > > For policy questions, send mail to: > Jim Bacher: > David Heald: - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
So there are no UL Listed breakers that are only good for supplementary protection?? On Dec 3, 2013, at 2:26 PM, "Jim Morrison" mailto:jmorri...@qps.ca>> wrote: Hi John: If the device has a UL - , this would indicate approval to UL489 & suitable for a branch circuit device. If only marked - , the device would be approved to UL1077 and only recognized as a supplementary protector & not suitable for a branch circuit. Regards Jim Morrison C.E.T. C.E.I. Chief of Engineering / Vice President – Field Evaluations/Engineering | QPS Evaluation Services Inc. | 81 Kelfield Street, Unit 8, Toronto, Ontario, M9W 5A3 – OSHA Recognized NRTL Office (416-241-8857) | Cell ( 416-318-9104) | Fax (416-241-0682) | Toll Free ( 1-877-746-4777) | Website: www.qps.ca<http://www.qps.ca/> ; email jmorri...@qps.ca<mailto:jmorri...@qps.ca> -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: December-03-13 1:38 PM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary 1. UL 'White' book 2. UL marking guide for CBs 3. The particular standard used (489/1077/508x) 4. iaei.org<http://iaei.org> 5. mfr spec sheet 6. Vulcan mind-meld Brian From: jral...@productsafetyinc.com<mailto:jral...@productsafetyinc.com> [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 03, 2013 10:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary Hi, Is there a way to confirm if a CB is good for Branch Circuit Protection vs Supplementary by the markings on the device? Basically I want to be able to confirm in the field. I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The Listing mark vs Recognition mark would be the obvious one, but I'm told you can have Listed CB's that are not good for Branch Circuit Protection. I greatly appreciate the input. Thank you, John - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to mailto:emc-p...@ieee.org>> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas mailto:emcp...@radiusnorth.net>> Mike Cantwell mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher: mailto:j.bac...@ieee.org>> David Heald: mailto:dhe...@gmail.com>> QPS Disclaimer This email may contain confidential or privileged information and is intended only for the use of the individual to whom or entity to which it is addressed. If you are not the intended recipient, or the person responsible for delivering the message to the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and it's attachments to the sender. Then permanently delete all copies of the message. Thank you. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
You people are much too nice and way too helpful. Shall I provide dirtbag lessons (am fully qualified to instruct) on how to answer questions without providing answer? But there are, in fact, listed CBs intended for supp interrupt protect. Brian From: Jim Morrison [mailto:jmorri...@qps.ca] Sent: Tuesday, December 03, 2013 12:28 PM To: jral...@productsafetyinc.com Cc: EMC-PSTC@LISTSERV.IEEE.ORG; Brian Oconnell Subject: Circuit Breakers - Branch Circuit Protection vs Supplementary Hi John: If the device has a UL - , this would indicate approval to UL489 & suitable for a branch circuit device. If only marked - , the device would be approved to UL1077 and only recognized as a supplementary protector & not suitable for a branch circuit. Regards Jim Morrison C.E.T. C.E.I. Chief of Engineering / Vice President - Field Evaluations/Engineering | QPS Evaluation Services Inc. | 81 Kelfield Street, Unit 8, Toronto, Ontario, M9W 5A3 - OSHA Recognized NRTL Office (416-241-8857) | Cell ( 416-318-9104) | Fax (416-241-0682) | Toll Free ( 1-877-746-4777) | Website: www.qps.ca ; email jmorri...@qps.ca -Original Message- From: Brian Oconnell [mailto:oconne...@tamuracorp.com] Sent: December-03-13 1:38 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary 1. UL 'White' book 2. UL marking guide for CBs 3. The particular standard used (489/1077/508x) 4. iaei.org 5. mfr spec sheet 6. Vulcan mind-meld Brian From: jral...@productsafetyinc.com [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 03, 2013 10:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary Hi, Is there a way to confirm if a CB is good for Branch Circuit Protection vs Supplementary by the markings on the device? Basically I want to be able to confirm in the field. I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The Listing mark vs Recognition mark would be the obvious one, but I'm told you can have Listed CB's that are not good for Branch Circuit Protection. I greatly appreciate the input. Thank you, John - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
Thanks guys! I especially like to Vulcan Mind-meld On Dec 3, 2013, at 2:11 PM, "Peter Tarver" mailto:ptar...@enphaseenergy.com>> wrote: John - The simplest method is whether or not the breaker is Listed or Recognized. If it's Listed, it's suitable for branch circuit protection, within the caveats of the product category (some exceptions may exist, but should be detailed in the Listing). Recognized breakers are never suitable for branch circuit protection and are only suitable for supplementary protection applications, unless it's used as a part of a Listed assembly identified for use as branch circuit protection. QVNU2 "breakers" are not suitable for branch circuit protection. Regards, Peter Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
John - The simplest method is whether or not the breaker is Listed or Recognized. If it's Listed, it's suitable for branch circuit protection, within the caveats of the product category (some exceptions may exist, but should be detailed in the Listing). Recognized breakers are never suitable for branch circuit protection and are only suitable for supplementary protection applications, unless it's used as a part of a Listed assembly identified for use as branch circuit protection. QVNU2 "breakers" are not suitable for branch circuit protection. Regards, Peter Tarver This email message is for the sole use of the intended recipient(s) and may contain confidential and/or privileged information. If you are not an intended recipient, you may not review, use, copy, disclose or distribute this message. If you received this message in error, please contact the sender by reply email and destroy all copies of the original message. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
Re: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
1. UL 'White' book 2. UL marking guide for CBs 3. The particular standard used (489/1077/508x) 4. iaei.org 5. mfr spec sheet 6. Vulcan mind-meld Brian From: jral...@productsafetyinc.com [mailto:jral...@productsafetyinc.com] Sent: Tuesday, December 03, 2013 10:13 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary Hi, Is there a way to confirm if a CB is good for Branch Circuit Protection vs Supplementary by the markings on the device? Basically I want to be able to confirm in the field. I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The Listing mark vs Recognition mark would be the obvious one, but I'm told you can have Listed CB's that are not good for Branch Circuit Protection. I greatly appreciate the input. Thank you, John - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
[PSES] Circuit Breakers - Branch Circuit Protection vs Supplementary
Hi, Is there a way to confirm if a CB is good for Branch Circuit Protection vs Supplementary by the markings on the device? Basically I want to be able to confirm in the field. I reviewed UL's guide cards for both (Branch Circuit - DIVQ and Supplementary - QVNU2). There are markings for DIVQ, but none stated for QVNU2. The Listing mark vs Recognition mark would be the obvious one, but I'm told you can have Listed CB's that are not good for Branch Circuit Protection. I greatly appreciate the input. Thank you, John - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas Mike Cantwell For policy questions, send mail to: Jim Bacher: David Heald:
