Re: [PSES] Removable door panel grounding

[Stultz, Mark]

I love these clips for the lab and prototyping work, but check the ratings 
before using on any equipment in the field.  In the US, most NRTLs consider 
this a splice which is not allowed on machinery by NFPA 79.  In the EU, these 
parts tend to be rated only for use in structures, not equipment.

Best regards,

Mark Stultz | CMSE(r) | Sealed Air | Automated Packaging Systems | Streetsboro, 
OH | 330-342-2402

From: James Pawson (U3C) 
Sent: Friday, 17 June, 2022 3:43 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Removable door panel grounding


 CAUTION: This email originated from outside of the organization. Do not click 
links or open attachments unless you recognize the sender and know the content 
is safe.

Hi Frank,

Could you use a spring clip like this in series with the earthing conductor to 
permit easy disconnection and reconnection?

https://www.wago.com/gb/installation-terminal-blocks-and-connectors/compact-splicing-connector/p/221-412

https://www.wago.com/gb/installation-terminal-blocks-and-connectors/compact-splicing-connector/p/221-612

I love these connectors and use them all around the lab

All the best
James


James Pawson
Managing Director & EMC Problem Solver

Unit 3 Compliance Ltd
EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy

www.unit3compliance.co.uk
  |  ja...@unit3compliance.co.uk
+44(0)1274 911747  |  +44(0)7811 139957
2 Wellington Business Park, New Lane, Bradford, BD4 8AL
Registered in England and Wales # 10574298



From: Frank Tang 
<0d3fa4ae712a-dmarc-requ...@listserv.ieee.org>
Sent: 16 June 2022 20:23
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Removable door panel grounding

Hi All,
In the past we have typically done a stud and nut grounding for removable 
lift-off access panels, but this is an inconvenience to disconnect the ground 
cable.
What are other methods for grounding large panel doors (3ft x 7ft) if any?

--
Thank you and best regards.
- Frank
-


This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
mailto:emc-p...@ieee.org>>

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html

Website: 
http://www.ieee-pses.org/
Instructions: http://www.ieee-pses.org/list.html (including how to 

Re: [PSES] Removable door panel grounding

[Stultz, Mark]

In my experience, a single connection point is risky as it only takes a small 
amount of corrosion to cause the machine to fail the 60204-1 ground bond test.

Mark Stultz | CMSE(r) | Sealed Air | Automated Packaging Systems | Streetsboro, 
OH | 330-342-2402

From: Ken Javor 
Sent: Thursday, 16 June, 2022 6:37 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Removable door panel grounding


 CAUTION: This email originated from outside of the organization. Do not click 
links or open attachments unless you recognize the sender and know the content 
is safe.

I'm just curious why something like a spring-loaded captive "finger" couldn't 
be in contact with the door/plate when installed.  I'm assuming here the 
grounding is for safety, not EMI. In the latter case, the gasket approach is 
necessary.  Also, for safety I don't see the gas-tight spot as an issue: a 
little corrosion or "gunk" between plate and finger would break down in the 
event of a line-potential fault to the door/access panel.

Ken Javor
Phone: (256) 650-5261


From: John Cochran 
https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fjcochran%40strongarm.com%2F=05%7C01%7Cmark.stultz%40sealedair.com%7C5195441dc5e341a87b6b08da4fe8cf6d%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C637910158584124332%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C=qrCfIF6iRNMzdGQW7Yb5PrQjvnUV1T4%2FZAYLCXPFF1c%3D=0>>
Reply-To: John Cochran 
https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fjcochran%40strongarm.com%2F=05%7C01%7Cmark.stultz%40sealedair.com%7C5195441dc5e341a87b6b08da4fe8cf6d%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C637910158584124332%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C=qrCfIF6iRNMzdGQW7Yb5PrQjvnUV1T4%2FZAYLCXPFF1c%3D=0>>
Date: Thu, 16 Jun 2022 19:52:00 +
To: 
https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2FEMC-PSTC%40listserv.ieee.org%2F=05%7C01%7Cmark.stultz%40sealedair.com%7C5195441dc5e341a87b6b08da4fe8cf6d%7C2691a2514c384643af0b0c0982f197bd%7C0%7C0%7C637910158584124332%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C=I6SChk8OAxhZgOVFUiIsIp0mzMmUb%2F%2Fc8lJn2RdAEh0%3D=0>>
Subject: Re: [PSES] Removable door panel grounding

>From my knowledge, the access panel will need a ground conductor or metal to 
>metal contact.  The second is more tricky as there can be no electrical 
>components on the panel and no possibility of a live conductor touch it.

I would find a way to keep the ground conductor connected but maybe consider 
ground studs at opposite corners so it has little slack when closed but allows 
the panel to be set aside without disconnecting the ground.


John Cochran
jcoch...@strongarm.com
 
215-443-3400 x219


From: Stultz, Mark 
<0f79f2e10e47-dmarc-requ...@listserv.ieee.org>
Sent: Thursday, June 16, 2022 15:38
To: 
EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Removable door panel grounding


CAUTION: This message originated from outside Strongarm. Do not open 
attachments or click on links if you do not recognize the sender.


Hi Frank,
Can you do a longer ground that allows moving the cover to the side?  In my 
experience it is risky to design a system where the ground is routinely 
disconnected.  If you need to design it that way, I recommend using a braided 
gasket that is partially compressed when the panel is installed.  You'll need 
the panel and gasket plated so that there is no corrosion that would increase 
the contact resistance since this arrangement can't be considered gas-tight.

Best regards,


Mark Stultz | CMSE(r) | Sealed Air | Automated 

Re: [PSES] Removable door panel grounding

[James Pawson (U3C)]

Hi Frank,



Could you use a spring clip like this in series with the earthing conductor to 
permit easy disconnection and reconnection?



https://www.wago.com/gb/installation-terminal-blocks-and-connectors/compact-splicing-connector/p/221-412



https://www.wago.com/gb/installation-terminal-blocks-and-connectors/compact-splicing-connector/p/221-612



I love these connectors and use them all around the lab



All the best

James





James Pawson

Managing Director & EMC Problem Solver



Unit 3 Compliance Ltd

EMC : Environmental & Vibration : Electrical Safety : CE & UKCA : Consultancy



  www.unit3compliance.co.uk  |   
 ja...@unit3compliance.co.uk

+44(0)1274 911747  |  +44(0)7811 139957

2 Wellington Business Park, New Lane, Bradford, BD4 8AL

Registered in England and Wales # 10574298







From: Frank Tang <0d3fa4ae712a-dmarc-requ...@listserv.ieee.org>
Sent: 16 June 2022 20:23
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Removable door panel grounding



Hi All,

In the past we have typically done a stud and nut grounding for removable 
lift-off access panels, but this is an inconvenience to disconnect the ground 
cable.

What are other methods for grounding large panel doors (3ft x 7ft) if any?



--
Thank you and best regards.
- Frank

-


This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 
mailto:emc-p...@ieee.org> >

All emc-pstc postings are archived and searchable on the web at: 
http://www.ieee-pses.org/emc-pstc.html

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:
Mike Cantwell mailto:mcantw...@ieee.org> >

For policy questions, send mail to:
Jim Bacher mailto:j.bac...@ieee.org> >
David Heald mailto:dhe...@gmail.com> >

  _

To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC 
 =1



--
This email has been checked for viruses by AVG.
https://www.avg.com

-

This message is from the IEEE Product Safety Engineering Society emc-pstc 
discussion list. To post a message to the list, send your e-mail to 


All emc-pstc postings are archived and searchable on the web at:
http://www.ieee-pses.org/emc-pstc.html

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:
Mike Cantwell 

For policy questions, send mail to:
Jim Bacher:  
David Heald: 
_
To unsubscribe from the EMC-PSTC list, click the following link: 
https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC=1