Re: [PSES] Symbols for CCC Approval
Are these symbols and text required for all EEE shipped to China or only ITE? This is the first I've heard of this. The Other Brian From: Mike Cantwell [mailto:mike.cantw...@outlook.com] Sent: Tuesday, September 30, 2014 8:10 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Symbols for CCC Approval Hi Scott, This requirement comes from the National Differences published in the CB Bulletin. If the product is ITE, then clause 1.7.2.1 was modified. It is acceptable to provide the Chinese translation of the statements below as well as to use the icons. I can provide the translation if you email me directly. China doesn't provide nice graphics for the symbol, you have to pull them right out of the CB report. Add requirements of warning for equipment intended to be used at altitude not exceeding 2000m or at non-tropical climate regions: For equipment intended to be used at altitude not exceeding 2000m, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used at altitude not exceeding 2000m. mountain icon For equipment intended to be used in not-tropical climate regions, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used in not-tropical climate regions. humidity icon If only the symbol used, the explanation of the symbol shall be contained in the instruction manual. The above statements shall be given in a language acceptable to the regions where the apparatus is intended to be used. Regards, Mike On 30-Sep-2014, at 5:13 PM, Scott Douglas sdouglas...@gmail.commailto:sdouglas...@gmail.com wrote: Hello all, I am being asked to add two symbols to my product silkscreen for CCC Approvals. One symbol is a not circle with waves at the bottom (water) and curled lines above (moisture I guess). This is to signify not for use in tropical regions. The second symbol is a circle with mountains and =2000m inside it. This signifies use only below 2,000 meters in altitude. Can anyone tell me where these two symbols come from (standards reference) and where one can get vector artwork for same? Thank you in advance for any help provided. Scott - 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.orgmailto: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 emcp...@radiusnorth.netmailto:emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.orgmailto:mcantw...@ieee.org For policy questions, send mail to: Jim Bacher j.bac...@ieee.orgmailto:j.bac...@ieee.org David Heald dhe...@gmail.commailto: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.orgmailto: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 emcp...@radiusnorth.netmailto:emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.orgmailto:mcantw...@ieee.org For policy questions, send mail to: Jim Bacher j.bac...@ieee.orgmailto:j.bac...@ieee.org David Heald dhe...@gmail.commailto: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
[PSES] 回复: [PSES] Symbols for CCC Approval
Hi Brian, It is only required for ITE and A/V equipment which is supposed to be used under 2000m or non-tropical zone. Best regards, Paul Wang - Reply message - 发件人: Kunde, Brian brian_ku...@lecotc.com 收件人: EMC-PSTC@LISTSERV.IEEE.ORG 主题: [PSES] Symbols for CCC Approval 日期: 周三, 10月 1 日, 2014 年 20:30 Are these symbols and text required for all EEE shipped to China or only ITE? This is the first I’ve heard of this. The Other Brian From: Mike Cantwell [mailto:mike.cantw...@outlook.com] Sent: Tuesday, September 30, 2014 8:10 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Symbols for CCC Approval Hi Scott, This requirement comes from the National Differences published in the CB Bulletin. If the product is ITE, then clause 1.7.2.1 was modified. It is acceptable to provide the Chinese translation of the statements below as well as to use the icons. I can provide the translation if you email me directly. China doesn’t provide nice graphics for the symbol, you have to pull them right out of the CB report. Add requirements of warning for equipment intended to be used at altitude not exceeding 2000m or at non-tropical climate regions: For equipment intended to be used at altitude not exceeding 2000m, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used at altitude not exceeding 2000m. mountain icon For equipment intended to be used in not-tropical climate regions, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used in not-tropical climate regions.” humidity icon If only the symbol used, the explanation of the symbol shall be contained in the instruction manual. The above statements shall be given in a language acceptable to the regions where the apparatus is intended to be used. Regards, Mike On 30-Sep-2014, at 5:13 PM, Scott Douglas sdouglas...@gmail.com wrote: Hello all, I am being asked to add two symbols to my product silkscreen for CCC Approvals. One symbol is a not circle with waves at the bottom (water) and curled lines above (moisture I guess). This is to signify not for use in tropical regions. The second symbol is a circle with mountains and =2000m inside it. This signifies use only below 2,000 meters in altitude. Can anyone tell me where these two symbols come from (standards reference) and where one can get vector artwork for same? Thank you in advance for any help provided. Scott - 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 emcp...@radiusnorth.net 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 emcp...@radiusnorth.net 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
Re: [PSES] 回复: [PSES] Symbols for CCC Approval
The national difference for China regarding tropical conditions is very similar to national differences for Singapore, Mexico and a few other tropical countries. It is relatively simple to meet this requirement with temperature/humidity preconditioning before the electric strength tests. As such, it isn’t too difficult to design products to meet the tropical condition requirements and thereby eliminate the need to apply the “no tropical conditions” marking. The altitude marking is more of a challenge. The Chinese national difference requires equipment to be designed for altitudes of 5000 meters minimum before this marking can be removed. This requires a significant change to spacings in power supplies. The way the regulation is written, unless the product is designed for use at 5000 meters, it must be marked for use at less than 2000 meters. There is no option for marking at altitudes between the two. That being said, the altitude marking is not required for SELV powered products where the spacings do not apply. For example, a laptop with an external supply would have the altitude marking on the power supply but not the laptop. Ted Eckert Compliance Engineer Microsoft Corporation ted.eck...@microsoft.commailto:ted.eck...@microsoft.com The opinions expressed are my own and do not necessarily reflect those of my employer. For that matter, the opinions expressed do not necessarily reflect the opinions of the Chinese national standards body, test agencies or possibly reality. From: paulw...@gmcompliance.com [mailto:paulw...@gmcompliance.com] Sent: Wednesday, October 1, 2014 7:17 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] 回复: [PSES] Symbols for CCC Approval Hi Brian, It is only required for ITE and A/V equipment which is supposed to be used under 2000m or non-tropical zone. Best regards, Paul Wang - Reply message - 发件人: Kunde, Brian brian_ku...@lecotc.commailto:brian_ku...@lecotc.com 收件人: EMC-PSTC@LISTSERV.IEEE.ORGmailto:EMC-PSTC@LISTSERV.IEEE.ORG 主题: [PSES] Symbols for CCC Approval 日期: 周三, 10月 1 日, 2014 年 20:30 Are these symbols and text required for all EEE shipped to China or only ITE? This is the first I’ve heard of this. The Other Brian From: Mike Cantwell [mailto:mike.cantw...@outlook.com] Sent: Tuesday, September 30, 2014 8:10 PM To: EMC-PSTC@LISTSERV.IEEE.ORGmailto:EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Symbols for CCC Approval Hi Scott, This requirement comes from the National Differences published in the CB Bulletin. If the product is ITE, then clause 1.7.2.1 was modified. It is acceptable to provide the Chinese translation of the statements below as well as to use the icons. I can provide the translation if you email me directly. China doesn’t provide nice graphics for the symbol, you have to pull them right out of the CB report. Add requirements of warning for equipment intended to be used at altitude not exceeding 2000m or at non-tropical climate regions: For equipment intended to be used at altitude not exceeding 2000m, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used at altitude not exceeding 2000m. mountain icon For equipment intended to be used in not-tropical climate regions, a warning label containing the following or a similar appropriate wording, or a symbol as in annex DD shall fixed to the equipment at readily visible place. Only used in not-tropical climate regions.” humidity icon If only the symbol used, the explanation of the symbol shall be contained in the instruction manual. The above statements shall be given in a language acceptable to the regions where the apparatus is intended to be used. Regards, Mike On 30-Sep-2014, at 5:13 PM, Scott Douglas sdouglas...@gmail.commailto:sdouglas...@gmail.com wrote: Hello all, I am being asked to add two symbols to my product silkscreen for CCC Approvals. One symbol is a not circle with waves at the bottom (water) and curled lines above (moisture I guess). This is to signify not for use in tropical regions. The second symbol is a circle with mountains and =2000m inside it. This signifies use only below 2,000 meters in altitude. Can anyone tell me where these two symbols come from (standards reference) and where one can get vector artwork for same? Thank you in advance for any help provided. Scott - 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.orgmailto: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
Re: [PSES] Symbols for CCC Approval
I did a lot of research on the new CQC requirements when I first found out about them in early 2012 so some of the information, like drop dead date, below may have changed since then but here is a short version of what I learned. I can only speak Audio/ Video Products but this requirement was published in the 2011 version of GB8898 (IEC60065) December 30th 2011. The transition dates for implementation were published by CQC on April 11th 2012. The drop dead date for meeting the new requirements and updating your CCC Mark certificates to the 2011 version of GB8898 was February 1, 2014 after which the certificate would be cancelled by CQC. The short answer is there are two new requirements to consider 1. Altitude: this requires meeting increased creepage requirements based on a max altitude of 5000m. Per IEC60664-1:2007 the clearance spacings increase by 1.48X the spacing for product for install below 2000M. As a result creepage distances will also increase as creepage cannot be less than clearance. 2. Tropical Environment: In addition to testing the product for an ambient temperature of 45C the product must meet reduced limits for Touch Current and for Hazardous Live parts. If you cannot meet the new Altitude and /or Tropical Environment you can mark your product and put information in the user instructions. Here is what I learned about the marking requirements. I can’t include the symbols due to list rules but the UL fact sheet Chuck posted the link for shows the symbols. As an alternative to meeting the increased spacing requirements you can declare the products are not meant for installation at altitudes above 2000m and add the following symbol and verbiage, in Chinese, to the product label. (Symbol for Altitude placed here) “Only suitable for use at areas with altitude less than 2000m” “仅适用于2000m以下地区安全使用” (Chinese translation) If only the symbol is used on the product label, due to size constraints, it shall be explained in the user manual. The safety warning sentence shall use the language acceptable to the country where the apparatus is intended to be sold (simplified Chinese is acceptable). For low voltage product with an external wall/floorwart power supply only the power supply will need be marked with the symbol or verbiage if noncompliant. The low voltage product is exempt from the marking requirement. 2. Tropical conditions Products must now comply for use in Tropical conditions and ambient temperatures above 45°C. If the product is evaluated for compliance for those conditions and is found non-compliant the product must have the following symbol and verbiage on the label. (Symbol for Tropical conditions placed here) “Only suitable for use at non-tropic climate areas” “仅适用于非热带气候条件下安全使用” (Chinese translation) If only the symbol is used on the product label, due to size constraints, it shall be explained in the user manual. The safety warning sentence shall use the language acceptable to the country where the apparatus is intended to be sold (simplified Chinese is acceptable). For a system comprised of an external power supply and low voltage product both may need the markings if they don’t comply with all of the heating, reduced touch current and accessible hazardous voltage limits. So you do have the choice of complying with the new requirements or marking your product and including information in the user’s manual. Hope this helps and please feel free to correct anything you feel is not valid in my post. Here is a link to the original CQC notice that started my research http://www.cqc.com.cn/english/published/TechnicalStandards/InformationonNewVersionStandard/webinfo/2012/04/1333591221336637.htm From: Kunde, Brian [mailto:brian_ku...@lecotc.com] Sent: Wednesday, October 01, 2014 8:30 AM To: EMC-PSTC@LISTSERV.IEEE.ORGmailto:EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Symbols for CCC Approval Are these symbols and text required for all EEE shipped to China or only ITE? This is the first I’ve heard of this. The Other Brian From: Mike Cantwell [mailto:mike.cantw...@outlook.com] Sent: Tuesday, September 30, 2014 8:10 PM To: EMC-PSTC@LISTSERV.IEEE.ORGmailto:EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Symbols for CCC Approval Hi Scott, This requirement comes from the National Differences published in the CB Bulletin. If the product is ITE, then clause 1.7.2.1 was modified. It is acceptable to provide the Chinese translation of the statements below as well as to use the icons. I can provide the translation if you email me directly. China doesn’t provide nice graphics for the symbol, you have to pull them right out of the CB report. Add requirements of warning for equipment intended to be
[PSES] Fwd: Australian plugs and sockets
Cancel that request, it turns out the New Zealanders have a much more helpful approach. Nick. Begin forwarded message: From: Nick Williams nick.willi...@conformance.co.uk Subject: Australian plugs and sockets Date: 1 October 2014 17:26:30 BST To: EMC-PSTC@LISTSERV.IEEE.ORG Please can anyone tell me what the full title/citation is for AS/NZ 3112 - which I believe is the standard for Australian domestic plugs and sockets? Standards Australia have delegated the sales of their standards to SAI Global, and SAI Global’s website doesn’t work. Deep joy. TIA. Nick. - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
[PSES] Australian plugs and sockets
Please can anyone tell me what the full title/citation is for AS/NZ 3112 - which I believe is the standard for Australian domestic plugs and sockets? Standards Australia have delegated the sales of their standards to SAI Global, and SAI Global’s website doesn’t work. Deep joy. TIA. Nick. Nick Williams Director Direct line: +44 1298 873811 Mobile: +44 7702 995135 email: nick.willi...@conformance.co.uk - Conformance Ltd - Product safety, approvals and CE-marking consultants The Old Methodist Chapel, Great Hucklow, Buxton, SK17 8RG England Tel. +44 1298 873800, Fax. +44 1298 873801, www.conformance.co.uk Registered in England, Company No. 3478646 - 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Australian plugs and sockets
AS/NZS 3112:2011 Approval and test specification - Plugs and socket-outlets From: Nick Williams [mailto:nick.willi...@conformance.co.uk] Sent: Wednesday, October 01, 2014 11:27 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Australian plugs and sockets Please can anyone tell me what the full title/citation is for AS/NZ 3112 - which I believe is the standard for Australian domestic plugs and sockets? Standards Australia have delegated the sales of their standards to SAI Global, and SAI Global's website doesn't work. Deep joy. TIA. Nick. Nick Williams Director Direct line: +44 1298 873811 Mobile: +44 7702 995135 email: nick.willi...@conformance.co.ukmailto:nick.willi...@conformance.co.uk - Conformance Ltd - Product safety, approvals and CE-marking consultants The Old Methodist Chapel, Great Hucklow, Buxton, SK17 8RG England Tel. +44 1298 873800, Fax. +44 1298 873801, www.conformance.co.ukhttp://www.conformance.co.uk Registered in England, Company No. 3478646 - 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.orgmailto: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 emcp...@radiusnorth.netmailto:emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.orgmailto:mcantw...@ieee.org For policy questions, send mail to: Jim Bacher j.bac...@ieee.orgmailto:j.bac...@ieee.org David Heald dhe...@gmail.commailto: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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
[PSES] Body Contact Areas
I'm trying to determine if a moving part is hazardous or not. According to IEC/EN 61010-1 section 7.3.4, Forces less than those listed below are considered Non-Hazardous: * Contact pressure of 50 N/cm² with a maximum force of 150 N. * For body contact areas greater than 3 cm² a temporary force of 250 N is allowed for no more than 0.75 seconds. To determine Contact pressure I must take the Max Force (which I can measure) and divide it by the Body Contact Area in cm². But how do I know what my body contact area is for a finger tip, entire finger, or a hand? Are there standard values that are used in industry for these calculations? Are there values used for arm, head, foot, etc.? How about if the moving part creates a Sheer hazard? How is the Body Contact Area determined in this case? Thanks for any advice on this topic. The Other Brian 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Body Contact Areas
Hi Brian, My interpretation of that section is that the pressure would be calculated based on the dimensions of the contact area of the moving part. I.e. if the part is sharp or comes to a point, it will exert more pressure, and cause more harm than a blunt object. As for a sheer hazard, I would revert to Table 12. I always liked the #2 pencil test. If you break it, you’re looking at a severe hazard. If not it is more than likely moderate. From there the rest of the risk analysis is pretty simple. Paul *From:* Kunde, Brian [mailto:brian_ku...@lecotc.com] *Sent:* Wednesday, October 01, 2014 1:35 PM *To:* EMC-PSTC@LISTSERV.IEEE.ORG *Subject:* [PSES] Body Contact Areas I’m trying to determine if a moving part is hazardous or not. According to IEC/EN 61010-1 section 7.3.4, Forces less than those listed below are considered Non-Hazardous: • Contact pressure of 50 N/cm² with a maximum force of 150 N. • For body contact areas greater than 3 cm² a temporary force of 250 N is allowed for no more than 0.75 seconds. To determine “Contact pressure” I must take the Max Force (which I can measure) and divide it by the “Body Contact Area” in cm². But how do I know what my body contact area is for a finger tip, entire finger, or a hand? Are there standard values that are used in industry for these calculations? Are there values used for arm, head, foot, etc.? How about if the moving part creates a Sheer hazard? How is the Body Contact Area determined in this case? Thanks for any advice on this topic. The Other Brian -- *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) 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 emcp...@radiusnorth.net 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com
Re: [PSES] Body Contact Areas
Brian,I actually went through the steps of estimating contact area of a finger and an object. For surface areas near the size of a finger (my own), the math seems to make sense. I then took the same method put it in a spreadsheet and applied it to the leading edge of a rotating fan. My goal was to show that a particularly low powered fan was not a hazard. âEstimating again the actual contact area of the fan blade against a finger and rotational force, the math was able to tell me if I had exceeded or not exceeded a limit. In that test I also used myself as a guinea pig and actually stuck my own finger onto the fan. I was no worse for the wear.I am not aware of any IEC based standards for body parts other than the normal accessibility tests and ergonomics. Nor do I know of any information on skin sensitivity as you might find for children vs adult. I believe in the past SEMI or SEMATCH guidelines have addressed certain cases such as the small size 20% âof Asian females and the large size of the 80% European male. If can show a good and justifiable rationale, you should be able to make a good case with any third party reviewer. Thanks, - dougDouglas Powellhttp://www.linkedin.com/in/dougp01 From: Kunde, BrianSent: Wednesday, October 1, 2014 2:35 PMTo: EMC-PSTC@LISTSERV.IEEE.ORGReply To: Kunde, BrianSubject: [PSES] Body Contact Areas Iâm trying to determine if a moving part is hazardous or not. According to IEC/EN 61010-1 section 7.3.4, Forces less than those listed below are considered Non-Hazardous: ⢠Contact pressure of 50 N/cm² with a maximum force of 150 N. ⢠For body contact areas greater than 3 cm² a temporary force of 250 N is allowed for no more than 0.75 seconds. To determine âContact pressureâ I must take the Max Force (which I can measure) and divide it by the âBody Contact Areaâ in cm². But how do I know what my body contact area is for a finger tip, entire finger, or a hand? Are there standard values that are used in industry for these calculations? Are there values used for arm, head, foot, etc.? How about if the moving part creates a Sheer hazard? How is the Body Contact Area determined in this case? Thanks for any advice on this topic. The Other Brian 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 emcp...@radiusnorth.net 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 emcp...@radiusnorth.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher j.bac...@ieee.org David Heald dhe...@gmail.com