Re: [PSES] Symbols for CCC Approval

2014-10-01 Thread Kunde, Brian
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

-


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David Heald dhe...@gmail.commailto:dhe...@gmail.com

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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 
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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.

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[PSES] 回复: [PSES] Symbols for CCC Approval

2014-10-01 Thread paulwang
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.



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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

2014-10-01 Thread Ted Eckert
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

2014-10-01 Thread Tyra, John

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

2014-10-01 Thread Nick Williams
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. 
 
 


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formats), large files, etc.

Website:  http://www.ieee-pses.org/
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List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
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David Heald: dhe...@gmail.com


[PSES] Australian plugs and sockets

2014-10-01 Thread Nick Williams
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


-

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discussion list. To post a message to the list, send your e-mail to 
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All emc-pstc postings are archived and searchable on the web at:
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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:
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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

2014-10-01 Thread jral...@productsafetyinc.com
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 
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All emc-pstc postings are archived and searchable on the web at: 
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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 
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List rules: http://www.ieee-pses.org/listrules.html

For help, send mail to the list administrators:
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For policy questions, send mail to:
Jim Bacher j.bac...@ieee.orgmailto:j.bac...@ieee.org
David Heald dhe...@gmail.commailto:dhe...@gmail.com

-

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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

2014-10-01 Thread Kunde, Brian
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:
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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)
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For help, send mail to the list administrators:
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Re: [PSES] Body Contact Areas

2014-10-01 Thread Paul Milton
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
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Re: [PSES] Body Contact Areas

2014-10-01 Thread Doug Powell
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. ‎Estimating 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% ‎of 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






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.



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