Re: [PSES] 208 split-phase?
Ralph – I’m less familiar with the CEC, but the NEC does not preclude 208/120 V WYE to a single-family home (residence). It all depends on how much one is willing to pay the utility for the service and proper provisioning and system design at the use location. Peter Tarver *From:* McDiarmid, Ralph [mailto:ralph.mcdiar...@schneider-electric.com] *Sent:* Thursday, October 22, 2015 15:00 *To:* EMC-PSTC@LISTSERV.IEEE.ORG *Subject:* Re: [PSES] 208 split-phase? NEC art 210.4 and 210.5 seem to allow it and the CEC here in Canada certainly allows it. For large residential highrises, it's probably simpler and cost effective to distribute 120/208 throughout the building (1/3 of the suites on one 208 leg, and so on) Phase balancing would be part of the building electrical plan. Sending a single-phase MV feeder to 1MVA, 120/240V transformer is likely a comprehmise It's different for low density residential where stringing a mile or two of single-phase MV to feed 120/240 pole transformers throughout the neighborhood makes more sense. - 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
Most residential high-rise buildings distribute 120/208V throughout the building. Electric ranges and dryers will run from 120/208V or 120/240V ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: Don Gies <don.g...@alcatel-lucent.com> To: EMC-PSTC@LISTSERV.IEEE.ORG, Date: 10/22/2015 03:09 AM Subject: Re: [PSES] 208 split-phase? Peter, It doesn’t sound right. Somebody may be describing a 120/240 V, 3-Wire system, and mixing it up with a 120/208 V, Y-connected power. Hope all is well. DON GIES ALCATEL-LUCENT SENIOR PRODUCT COMPLIANCE ENGINEER GLOBAL PRODUCT COMPLIANCE LABORATORY 600-700 Mountain Avenue Room 5B-104 Murray Hill, NJ 07974-0636 USA Phone: +1 908 582 5978 Mobile: +1 732 207 7828 don.g...@alcatel-lucent.com -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 < 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> __ This email has been scanned by the Symantec Email Security.cloud service. __ - 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 < 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
Many utilities will specify 120 V utilization voltage with a tolerance that results in a range of 104 V – 127 V. Based on Mr. Tarver’s original submittal, I doubt that this 104 V is being confused for what he is asking about. However, it will at least offer it as a possibility. 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: Nyffenegger, Dave [mailto:dave.nyffeneg...@bhemail.com] Sent: Thursday, October 22, 2015 2:32 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? I believe NFPA 70 specifies 120/240V for all residential household voltages. -Dave From: McDiarmid, Ralph [mailto:ralph.mcdiar...@schneider-electric.com] Sent: Thursday, October 22, 2015 5:19 PM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] 208 split-phase? Most residential high-rise buildings distribute 120/208V throughout the building. Electric ranges and dryers will run from 120/208V or 120/240V ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: Don Gies <don.g...@alcatel-lucent.com<mailto:don.g...@alcatel-lucent.com>> To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>, Date: 10/22/2015 03:09 AM Subject: Re: [PSES] 208 split-phase? Peter, It doesn’t sound right. Somebody may be describing a 120/240 V, 3-Wire system, and mixing it up with a 120/208 V, Y-connected power. Hope all is well. DON GIES ALCATEL-LUCENT SENIOR PRODUCT COMPLIANCE ENGINEER GLOBAL PRODUCT COMPLIANCE LABORATORY 600-700 Mountain Avenue Room 5B-104 Murray Hill, NJ 07974-0636 USA Phone: +1 908 582 5978 Mobile: +1 732 207 7828 don.g...@alcatel-lucent.com<mailto:don.g...@alcatel-lucent.com> -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org<mailto:ptar...@ieee.org> - 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 <emc-p...@ieee.org<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<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2femc-pstc.html=01%7c01%7cted.eckert%40MICROSOFT.COM%7cfc3d466a83cb472f42ed08d2db287481%7c72f988bf86f141af91ab2d7cd011db47%7c1=vnMTc2t%2ftu%2f9G6pDwXkhu5sBKXF%2fQQVOON6HnuAbiBM%3d> Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fproduct-compliance.oc.ieee.org%2f=01%7c01%7cted.eckert%40MICROSOFT.COM%7cfc3d466a83cb472f42ed08d2db287481%7c72f988bf86f141af91ab2d7cd011db47%7c1=Dn5gTJmXTam3sgvll0993dntD9KDr7SUNAA2%2bkRk21Q%3d> can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2f=01%7c01%7cted.eckert%40MICROSOFT.COM%7cfc3d466a83cb472f42ed08d2db287481%7c72f988bf86f141af91ab2d7cd011db47%7c1=hYkrF%2fj3K6bSPk1vX9caJD7l0OYJucWC451Z44%2bCb8k%3d> Instructions: http://www.ieee-pses.org/list.html<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2flist.html=01%7c01%7cted.eckert%40MICROSOFT.COM%7cfc3d466a83cb472f42ed08d2db287481%7c72f988bf86f141af91ab2d7cd011db47%7c1=wKxzmGjzmUjzkKexoZOTCCij60ZBd4NrmLpEBAWYQrM%3d> (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2flistrules.html=01%7c01%7cted.eckert%40MICROSOFT.COM%7cfc3d466a83cb472f42ed08d2db287481%7c72f988bf86f141af91ab2d7cd011db47%7c1=R8vLx21T7MfczewN1yFM2LYgVDR56ubViQAxw38HPis%3d> For help, send mail to the list administrators: Scott Douglas <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <
Re: [PSES] 208 split-phase?
NEC art 210.4 and 210.5 seem to allow it and the CEC here in Canada certainly allows it. For large residential highrises, it's probably simpler and cost effective to distribute 120/208 throughout the building (1/3 of the suites on one 208 leg, and so on) Phase balancing would be part of the building electrical plan. Sending a single-phase MV feeder to 1MVA, 120/240V transformer is likely a comprehmise It's different for low density residential where stringing a mile or two of single-phase MV to feed 120/240 pole transformers throughout the neighborhood makes more sense. ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: "Nyffenegger, Dave" <dave.nyffeneg...@bhemail.com> To: "ralph.mcdiar...@schneider-electric.com" <ralph.mcdiar...@schneider-electric.com>, "EMC-PSTC@LISTSERV.IEEE.ORG" <EMC-PSTC@LISTSERV.IEEE.ORG>, Date: 10/22/2015 02:32 PM Subject: RE: [PSES] 208 split-phase? I believe NFPA 70 specifies 120/240V for all residential household voltages. -Dave From: McDiarmid, Ralph [mailto:ralph.mcdiar...@schneider-electric.com] Sent: Thursday, October 22, 2015 5:19 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Most residential high-rise buildings distribute 120/208V throughout the building. Electric ranges and dryers will run from 120/208V or 120/240V ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: Don Gies <don.g...@alcatel-lucent.com> To: EMC-PSTC@LISTSERV.IEEE.ORG, Date: 10/22/2015 03:09 AM Subject: Re: [PSES] 208 split-phase? Peter, It doesn’t sound right. Somebody may be describing a 120/240 V, 3-Wire system, and mixing it up with a 120/208 V, Y-connected power. Hope all is well. DON GIES ALCATEL-LUCENT SENIOR PRODUCT COMPLIANCE ENGINEER GLOBAL PRODUCT COMPLIANCE LABORATORY 600-700 Mountain Avenue Room 5B-104 Murray Hill, NJ 07974-0636 USA Phone: +1 908 582 5978 Mobile: +1 732 207 7828 don.g...@alcatel-lucent.com -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 < 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> __ This email has been scanned by the Symantec Email Security.cloud service. __ - 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 < 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 <sdoug
Re: [PSES] 208 split-phase?
I believe NFPA 70 specifies 120/240V for all residential household voltages. -Dave From: McDiarmid, Ralph [mailto:ralph.mcdiar...@schneider-electric.com] Sent: Thursday, October 22, 2015 5:19 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Most residential high-rise buildings distribute 120/208V throughout the building. Electric ranges and dryers will run from 120/208V or 120/240V ___ Ralph McDiarmid | Schneider Electric | Solar Business | CANADA | Regulatory Compliance Engineering From: Don Gies <don.g...@alcatel-lucent.com> To: EMC-PSTC@LISTSERV.IEEE.ORG, Date: 10/22/2015 03:09 AM Subject: Re: [PSES] 208 split-phase? Peter, It doesn’t sound right. Somebody may be describing a 120/240 V, 3-Wire system, and mixing it up with a 120/208 V, Y-connected power. Hope all is well. DON GIES ALCATEL-LUCENT SENIOR PRODUCT COMPLIANCE ENGINEER GLOBAL PRODUCT COMPLIANCE LABORATORY 600-700 Mountain Avenue Room 5B-104 Murray Hill, NJ 07974-0636 USA Phone: +1 908 582 5978 Mobile: +1 732 207 7828 don.g...@alcatel-lucent.com<mailto:don.g...@alcatel-lucent.com> -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org<mailto:ptar...@ieee.org> - 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 <emc-p...@ieee.org<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 <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald: <dhe...@gmail.com<mailto:dhe...@gmail.com>> __ This email has been scanned by the Symantec Email Security.cloud service. __ - 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 <emc-p...@ieee.org<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 <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<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 <emc-p...@ieee.org<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, et
Re: [PSES] 208 split-phase?
Peter, It doesnt sound right. Somebody may be describing a 120/240 V, 3-Wire system, and mixing it up with a 120/208 V, Y-connected power. Hope all is well. DON GIES ALCATEL-LUCENT SENIOR PRODUCT COMPLIANCE ENGINEER GLOBAL PRODUCT COMPLIANCE LABORATORY 600-700 Mountain Avenue Room 5B-104 Murray Hill, NJ 07974-0636 USA Phone: +1 908 582 5978 Mobile: +1 732 207 7828 <mailto:don.g...@alcatel-lucent.com> don.g...@alcatel-lucent.com -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver <mailto:ptar...@ieee.org> ptar...@ieee.org - 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> emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: <http://www.ieee-pses.org/emc-pstc.html> 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/> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: <http://www.ieee-pses.org/> http://www.ieee-pses.org/ Instructions: <http://www.ieee-pses.org/list.html> http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: <http://www.ieee-pses.org/listrules.html> http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas < <mailto:sdoug...@ieee.org> sdoug...@ieee.org> Mike Cantwell < <mailto:mcantw...@ieee.org> mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: < <mailto:j.bac...@ieee.org> j.bac...@ieee.org> David Heald: < <mailto:dhe...@gmail.com> 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
Essentially all residential electrical services in the US are 120/240 volt split phase services. Electricians call this single phase service. As an electrical engineer, I like to think of it as two phase service, with phases at 180 degrees. You will not find residential service provided 208 volts. Many commercial and business sites use 120/208 volt three phase service. When portions of these sites do not need much power, for example a store tenant in a strip mall, they will often use inexpensive residential equipment like a 120/240V power panel and supply it with two phases of the three phase service. This means they have the normal 120 volt available at convenience outlets. If they have a 240 volt single phase appliance, it will be operating at 208 volts. Since most such appliances in the US are resistive loads like stoves, clothes dryers, etc. it just means the thermostat runs a longer cycle to get the heat needed. There is not much other 240 volt single phase equipment in the US. When necessary it often will run OK at 208 volts and no one notices the difference. Single phase motors are an exception but they often are provided with taps for 208, 240 and more options. Note that unlike Europe, equipment in the US operating on 208 or 240 volts will always be operating across two hot phases (at 120V), not from a 240 volt hot phase to a grounded neutral. This can have an impact on disconnect switching, overcurrent protection and EMC filtering. Bob Johnson 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 > -- The PDP-11 is 45 years old. - 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] 208 split-phase?
Peter, The idea of a 208 V split phase is unusual and probably not the case here. The number 208 is obviously derived from a three phase system. I believe the system you are talking about is a red-leg or high-leg three phase system. Wikipedia does have a good review in this case ( https://en.wikipedia.org/wiki/High-leg_delta; https://en.wikipedia.org/wiki/Split-phase_electric_power). In the figure on Wikipedia this is a 240 VAC delta with the neutral applied between L1 & L2, creating 120 V split-phases in 180 degree opposition. The 208 is the high leg, L3 in the figure. You can verify the voltages using the bit of trig further down the page. This voltage system is used in many parts of the world but is no longer very common in the USA. The alternative system this could be is a 416 V three phase, delta configured with split phase secondaries at 208 V. I have worked with this configuration in the past. All the best, Doug doug...@gmail.com http://www.linkedin.com/in/dougp01 On Wed, Oct 21, 2015 at 8:21 AM, Peter Tarverwrote: > Good morning. > > There are oftensmall, legacy grids that you come across or hear > about. > > I was recently told that some areas of the Northeast US have a 208 > V, split-phase power system to some residences and small businesses. > Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A > specific area cited was "around Boston." > > Has anyone heard of or directly experienced this voltage system? > Is it split-phase or was I misinformed and it's from a WYE > connected transformer? > > Peter Tarver > ptar...@ieee.org > > - > > 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 < > 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 > Mike Cantwell > > For policy questions, send mail to: > Jim Bacher: > David Heald: > -- Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 - 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] 208 split-phase?
Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 toAll 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] 208 split-phase?
Although I agree with Doug in general, I will note that Massachusetts has 40 independent municipally owned electrical utilities. I have no evidence of 104 VAC supply, but it is possible that one of the 40 utilities supports an unusual legacy system. http://www.scribd.com/doc/225880245/Electric-Utility-Map-of-Massachusetts#scribd 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: Doug Powell [mailto:doug...@gmail.com] Sent: Wednesday, October 21, 2015 9:01 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Peter, The idea of a 208 V split phase is unusual and probably not the case here. The number 208 is obviously derived from a three phase system. I believe the system you are talking about is a red-leg or high-leg three phase system. Wikipedia does have a good review in this case (https://en.wikipedia.org/wiki/High-leg_delta<https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fen.wikipedia.org%2fwiki%2fHigh-leg_delta=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=5JLeTECGXbKMqrfstHvfHOE1HVHP9iPAiTr97oOd8gE%3d>; https://en.wikipedia.org/wiki/Split-phase_electric_power<https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fen.wikipedia.org%2fwiki%2fSplit-phase_electric_power=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=O0jRZIZasEx2Wp1DrU0TPLY3MuvzWQFLvsq%2blXmk1xk%3d>). In the figure on Wikipedia this is a 240 VAC delta with the neutral applied between L1 & L2, creating 120 V split-phases in 180 degree opposition. The 208 is the high leg, L3 in the figure. You can verify the voltages using the bit of trig further down the page. This voltage system is used in many parts of the world but is no longer very common in the USA. The alternative system this could be is a 416 V three phase, delta configured with split phase secondaries at 208 V. I have worked with this configuration in the past. All the best, Doug doug...@gmail.com<mailto:doug...@gmail.com> http://www.linkedin.com/in/dougp01<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.linkedin.com%2fin%2fdougp01=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=sgyB68YyNw6m3KnEiym3mwtxHQW8XlJ8aKS%2fMwhJjTM%3d> On Wed, Oct 21, 2015 at 8:21 AM, Peter Tarver <ptar...@ieee.org<mailto:ptar...@ieee.org>> wrote: Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org<mailto:ptar...@ieee.org> - 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 <emc-p...@ieee.org<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<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2femc-pstc.html=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=2KCT4iyp3EmeQ074z%2fneJ4bRESo0B%2fLZ%2fKQTaQO9zKo%3d> Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fproduct-compliance.oc.ieee.org%2f=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=356ECCqr5NfVNTFWhtFC126hgZxGalIMAbr86O88778%3d> can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2f=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=VWcexVxpC60dFlh5RfimWdTL6qT%2fXulgb%2f3GPDeemW4%3d> Instructions: http://www.ieee-pses.org/list.html<https://na01.safelinks.protection.outlook.com/?url=http%3a%2f%2fwww.ieee-pses.org%2flist.html=01%7c01%7cted.eckert%40MICROSOFT.COM%7cb92b2dd1e2264a1c549c08d2da312353%7c72f988bf86f141af91ab2d7cd011db47%7c1=w%2bCfiQhCM%2bdbEj5hjoX6EZNSQe5B3IYvZ%2bYfoos9jsc%3d> (including how to unsubscribe) List rules: http://www.ieee-pses.or
Re: [PSES] 208 split-phase?
Brian, Any significant impedance differences between these two supply configurations? Brian Sr Burrito Quality Control Engineer -Original Message- From: Kunde, Brian [mailto:brian_ku...@lecotc.com] Sent: Wednesday, October 21, 2015 12:34 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? I've never heard of a Utility Company providing 208 "split-phase". I have heard the term "208 split-phase" many times from our customers who claim to have this but in reality what they have is 208 3-phase wired into a 230V split-phase receptacle but only using 208 Phase to Phase with the Grounded Neutral. In our EMC lab, we do not have a true 220 split-phase so we use 208 with a grounded neutral. It is the closest thing we have to test 220 volt household appliances like ranges, ovens, microwaves, and dryers. We know it is not exactly the same but close. The Other Brian -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
When I had that same task, I just bought a several kW Variac, connected it across the 208 VAC phase of a 3-phase feed, and used the Variac to increase the needed 5% or so. A big fan for the Variac can be cheaper than buying a really big Variac. Ed Price WB6WSN Chula Vista, CA USA -Original Message- From: Brian O'Connell [mailto:oconne...@tamuracorp.com] Sent: Wednesday, October 21, 2015 12:48 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Brian, Any significant impedance differences between these two supply configurations? Brian Sr Burrito Quality Control Engineer -Original Message- From: Kunde, Brian [ <mailto:brian_ku...@lecotc.com> mailto:brian_ku...@lecotc.com] Sent: Wednesday, October 21, 2015 12:34 PM To: <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? I've never heard of a Utility Company providing 208 "split-phase". I have heard the term "208 split-phase" many times from our customers who claim to have this but in reality what they have is 208 3-phase wired into a 230V split-phase receptacle but only using 208 Phase to Phase with the Grounded Neutral. In our EMC lab, we do not have a true 220 split-phase so we use 208 with a grounded neutral. It is the closest thing we have to test 220 volt household appliances like ranges, ovens, microwaves, and dryers. We know it is not exactly the same but close. The Other Brian -Original Message- From: Peter Tarver [ <mailto:ptar...@ieee.org> mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: <mailto:EMC-PSTC@LISTSERV.IEEE.ORG> EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver <mailto:ptar...@ieee.org> ptar...@ieee.org - 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> emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: <http://www.ieee-pses.org/emc-pstc.html> 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/> http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: <http://www.ieee-pses.org/> http://www.ieee-pses.org/ Instructions: <http://www.ieee-pses.org/list.html> http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: <http://www.ieee-pses.org/listrules.html> http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas < <mailto:sdoug...@ieee.org> sdoug...@ieee.org> Mike Cantwell < <mailto:mcantw...@ieee.org> mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: < <mailto:j.bac...@ieee.org> j.bac...@ieee.org> David Heald: < <mailto:dhe...@gmail.com> 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
I've never heard of a Utility Company providing 208 "split-phase". I have heard the term "208 split-phase" many times from our customers who claim to have this but in reality what they have is 208 3-phase wired into a 230V split-phase receptacle but only using 208 Phase to Phase with the Grounded Neutral. In our EMC lab, we do not have a true 220 split-phase so we use 208 with a grounded neutral. It is the closest thing we have to test 220 volt household appliances like ranges, ovens, microwaves, and dryers. We know it is not exactly the same but close. The Other Brian -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
Doug – I’m not certain what I’m referring to. Hence the question. Since typical 120/240 V split-phase distribution in the US is from a center grounded delta, my inclination is to believe this follows that same method. Or the original proposition I received is incorrect and a three-phase WYE is used on the load side of the distribution transformer. I think I prefer “bastard leg.” Peter T *From:* Doug Powell [mailto:doug...@gmail.com] *Sent:* Wednesday, October 21, 2015 09:01 *To:* EMC-PSTC@LISTSERV.IEEE.ORG *Subject:* Re: [PSES] 208 split-phase? Peter, The idea of a 208 V split phase is unusual and probably not the case here. The number 208 is obviously derived from a three phase system. I believe the system you are talking about is a red-leg or high-leg three phase system. Wikipedia does have a good review in this case ( https://en.wikipedia.org/wiki/High-leg_delta; https://en.wikipedia.org/wiki/Split-phase_electric_power). In the figure on Wikipedia this is a 240 VAC delta with the neutral applied between L1 & L2, creating 120 V split-phases in 180 degree opposition. The 208 is the high leg, L3 in the figure. You can verify the voltages using the bit of trig further down the page. This voltage system is used in many parts of the world but is no longer very common in the USA. The alternative system this could be is a 416 V three phase, delta configured with split phase secondaries at 208 V. I have worked with this configuration in the past. All the best, Doug doug...@gmail.com http://www.linkedin.com/in/dougp01 On Wed, Oct 21, 2015 at 8:21 AM, Peter Tarver <ptar...@ieee.org> wrote: Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org - 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 < 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> -- Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 - 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 < 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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org> David Heald <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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw
Re: [PSES] 208 split-phase?
Brian of the nonburrito ilk - This is usually called 208 V single-phase. I'm still trying to clarify the specifics of the request. Peter Tarver > -Original Message- > From: Kunde, Brian > Sent: Wednesday, October 21, 2015 12:34 > > snip < > > I have heard the term "208 split-phase" many times from our > customers who claim to have this but in reality what they have > is 208 3-phase wired into a 230V split-phase receptacle but > only using 208 Phase to Phase with the Grounded Neutral. > > snip < - 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 toAll 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] 208 split-phase?
Peter, "208 V single-phase" is the correct term but when people uses the grounded neutral to drive 120V circuits then they often refer to it as "208 Split-Phase". It really isn't "split-phase" unless it is derived by a center tapped transformer secondary. But in most cases it works, so why not call it that? Non-Burrito Brian -Original Message- From: Peter Tarver [mailto:ptar...@enphaseenergy.com] Sent: Wednesday, October 21, 2015 4:27 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Brian of the nonburrito ilk - This is usually called 208 V single-phase. I'm still trying to clarify the specifics of the request. Peter Tarver > -Original Message- > From: Kunde, Brian > Sent: Wednesday, October 21, 2015 12:34 > > snip < > > I have heard the term "208 split-phase" many times from our customers > who claim to have this but in reality what they have is 208 3-phase > wired into a 230V split-phase receptacle but only using 208 Phase to > Phase with the Grounded Neutral. > > snip < - 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. 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 <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 <sdoug...@ieee.org> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
Re: [PSES] 208 split-phase?
Been there, done that with the fan too in order to test at +10%. -Dave From: Ed Price [mailto:edpr...@cox.net] Sent: Wednesday, October 21, 2015 4:11 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? When I had that same task, I just bought a several kW Variac, connected it across the 208 VAC phase of a 3-phase feed, and used the Variac to increase the needed 5% or so. A big fan for the Variac can be cheaper than buying a really big Variac. Ed Price WB6WSN Chula Vista, CA USA -Original Message- From: Brian O'Connell [mailto:oconne...@tamuracorp.com] Sent: Wednesday, October 21, 2015 12:48 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] 208 split-phase? Brian, Any significant impedance differences between these two supply configurations? Brian Sr Burrito Quality Control Engineer -Original Message- From: Kunde, Brian [mailto:brian_ku...@lecotc.com] Sent: Wednesday, October 21, 2015 12:34 PM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: Re: [PSES] 208 split-phase? I've never heard of a Utility Company providing 208 "split-phase". I have heard the term "208 split-phase" many times from our customers who claim to have this but in reality what they have is 208 3-phase wired into a 230V split-phase receptacle but only using 208 Phase to Phase with the Grounded Neutral. In our EMC lab, we do not have a true 220 split-phase so we use 208 with a grounded neutral. It is the closest thing we have to test 220 volt household appliances like ranges, ovens, microwaves, and dryers. We know it is not exactly the same but close. The Other Brian -Original Message- From: Peter Tarver [mailto:ptar...@ieee.org] Sent: Wednesday, October 21, 2015 10:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] 208 split-phase? Good morning. There are oftensmall, legacy grids that you come across or hear about. I was recently told that some areas of the Northeast US have a 208 V, split-phase power system to some residences and small businesses. Still 180° phase-to-phase and presumably 104 V phase-to-Neutral. A specific area cited was "around Boston." Has anyone heard of or directly experienced this voltage system? Is it split-phase or was I misinformed and it's from a WYE connected transformer? Peter Tarver ptar...@ieee.org<mailto:ptar...@ieee.org> - 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 <emc-p...@ieee.org<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 <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald: <dhe...@gmail.com<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 <emc-p...@ieee.org<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 <sdoug...@ieee.org<mailto:sdoug...@ieee.org>> Mike Cantwell <mcantw...@ieee.org<mailto:mcantw...@ieee.org>> For policy questions, send mail to: Jim Bacher <j.bac...@ieee.org<mailto:j.bac...@ieee.org>> David Heald <dhe...@gmail.com<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 <emc-p...@ieee.org&g