11 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 gro
.
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
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
74298
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
:53:57 + (UTC)
To: "emc-pstc@listserv.ieee.org" , Ken Javor
Subject: Re: [PSES] Removable door panel grounding
Hi Ken,
Yes, this is is regarding safety, we are not seeing EMC issues on previous
design.
This is something I didn't consider because of the door size (~3ft x 7ft)
and wei
On Thursday, June 16, 2022, 03:37:32 PM PDT, Ken Javor
wrote:
Re: [PSES] Removable door panel groundingI’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
2-2402
From: Frank Tang <0d3fa4ae712a-dmarc-requ...@listserv.ieee.org>
Sent: Thursday, 16 June, 2022 3:23 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Removable door panel grounding
| |
You don't often get email
from0d3fa4ae712a-dmarc-requ...@listserv.ieee.o
I¹m just curious why something like a spring-loaded captive ³finger²
couldn¹t be in contact with the door/plate when installed. I¹m assuming
here the grounding is for safety, not EMI. In the latter case, the gasket
approach is necessary. Also, for safety I don¹t see the gas-tight spot
2e10e47-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 y
: Frank Tang <0d3fa4ae712a-dmarc-requ...@listserv.ieee.org>
Sent: Thursday, 16 June, 2022 3:23 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Removable door panel grounding
You don't often get email from
0d3fa4ae712a-dmarc-requ...@listserv.ieee.org<mailto:0d3fa4ae712a-d
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
equ...@ieee.org>
Sent: Tuesday, September 24, 2019 10:49 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Grounding of metal cabinet
In my opinion, board-mounted AC inlets are inadvisable at best. The problems
extend to more than the risk of an open circuit during a ground fault. The AC
is that screwing the
circuit board down to the metal chassis provides the correct bonding for
grounding. The first thing that will most likely happen is that this fault
current will melt out the solder connection to the ground pin from the inlet to
the circuit board and open this circuit. There may
September 2019 14:55
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Grounding of metal cabinet
The rationale I remember learning is that the main grounding/earthing
connection must be made in a way such that any repairs would not need to
disconnect that main grounding connection. Let me
Microsoft Corporation
The opinions experessed are my own and do not necessarily reflect those of my
employer.
From: Pete Perkins
Sent: Tuesday, September 24, 2019 10:30 AM
To: Ted Eckert ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] Grounding of metal cabinet
Ted et al. Since we’re
The rationale I remember learning is that the main grounding/earthing
connection must be made in a way such that any repairs would not need to
disconnect that main grounding connection. Let me use Mr. Woodgate’s examples.
If you have an insulating terminal block, replacing the terminal block
h good results. The struggle has
been since the modularization of components and units has come into play. This
raises questions as to how to interconnect everything together in a way that
preserves the integrity of the earthing/grounding connection when it is a
principle safeguard against el
been since the modularization of components and units has come into play.
This raises questions as to how to interconnect everything together in a way
that preserves the integrity of the earthing/grounding connection when it is
a principle safeguard against electric shock. As an OF (= Old Fellow
The question is how the cabinet is earthed if the PE wire goes to a
terminal block. If a wire comes out of the terminal block to a stud on
the cabinet, that is less reliable than a solid connection. I suggest
you take the advice. It doesn't apply if the 'terminal block' is not an
insulating
A flexible 1-phase AC cable is entering a metal cabinet and the PE-wire is
directly connected to an Earth terminal block (green/yellow).
Some years ago, a safety engineer told me that the earth wire should first
be connected to a ground stud inside the cabinet via a lug terminal climp
and
To all who provided a response to my grounding question as expected the
expertise was excellent and very helpful.
Thanks again,
> On June 19, 2019 at 2:52 PM Pete Perkins
> <0061f3f32d0c-dmarc-requ...@ieee.org> wrote:
>
>
> Steve,You have received many g
Steve,You have received many good comments focusing especially on the
rational provision of earthing/grounding including under 60204-1.
It is not clear as to which specific argument will persuade the
customer however, perhaps you can get some movement to agreement
...@comcast.net]
Sent: Tuesday, June 18, 2019 2:39 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Grounding
HI all,
I have a client with whom I am having a discussion about grounding for an EN
60204-1 product. The product consists of 3 sub-modules all of which use mains
power derived from
Hi Steve:
I disagree with my colleagues.
You didn’t say how the mains was distributed from the first module to the
second and third modules. I have assumed the mains is also distributed by the
Wago/Din rail scheme.
If this is the case, then I would say the grounding can also
:00 PM (GMT-05:00) To: Steve Brody Cc: IEEE
EMC PSTC Subject: Re: [PSES] Grounding Steve,I
agree, you need a positive bonding connection back tot he PE point.The WAGO
terminal are excellent. They have some spectacular test videos on their web
site showing the effects of overcurrent
-19, at 14:38, Steve Brody wrote:
>
> HI all,
>
>
>
> I have a client with whom I am having a discussion about grounding for an EN
> 60204-1 product. The product consists of 3 sub-modules all of which use
> mains power derived from the first module where the
Sulis Consultants Ltd
Tel: +44 (0)7946 624317
Web: https://sulisconsultants.com/
Registered in England and Wales, number 05466247
From: Grasso, Charles
Sent: 18 June 2019 19:49
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Grounding
My 2c – You are correct (MOO).
Thanks!
Charles Grasso
W: 303
about grounding for
an EN 60204-1 product. The product consists of 3 sub-modules all of
which use mains power derived from the first module where the external
mains comes into the unit.
In the first module the ground from the branch circuit goes to a
ground stud, lockwasher and nut, and from
My 2c – You are correct (MOO).
Thanks!
Charles Grasso
W: 303-706-5467
From: Steve Brody [mailto:sgbr...@comcast.net]
Sent: Tuesday, June 18, 2019 12:39 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Grounding
This message originated outside of DISH and was sent by:
owner-emc-p
HI all,
I have a client with whom I am having a discussion about grounding for an EN
60204-1 product. The product consists of 3 sub-modules all of which use mains
power derived from the first module where the external mains comes into the
unit.
In the first module the ground from
Re: [PSES] Chamber grounding [General Use]
It's not my consensus! Yes, the building ground is likely to be noisy,
unless you actually connect directly back to its earth spike. Even then, the
wire you use is an inductor and may have noise induced in it.
I am quite sure that BS 7671 and othe
o: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
It's not my consensus! Yes, the building ground is likely to be noisy,
unless you actually connect directly back to its earth spike. Even then, the
wire you use is an inductor and may have noise induced in it.
I am
July 2017 07:16
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
Thanks all for the replies.
It seems that there is some divided opinion.
Some of the test houses I have spoken to state that they definitely ground
their chambers via ground spikes. This is to remove
Thanks all for the replies.
It seems that there is some divided opinion.
Some of the test houses I have spoken to state that they definitely ground
their chambers via ground spikes. This is to remove low frequency noise that
causes issues with the low frequency emc tests that are required in
oodgate [mailto:jmw1...@btinternet.com]
Sent: Tuesday 18 July 2017 21:09
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
I think the issue is far more about electrical safety than EMC. Of course
you are quite right about a Faraday cage not requiring an earth connectio
ttp://www.jmwa.demon.co.uk/> www.jmwa.demon.co.uk J M Woodgate and
Associates Rayleigh England
Sylvae in aeternum manent.
From: Ghery S. Pettit [mailto:n6...@comcast.net]
Sent: 18 July 2017 19:59
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
It's not so much that it
org>
Reply-To: <ri...@ieee.org>
Date: Tue, 18 Jul 2017 11:47:22 -0700
To: <EMC-PSTC@LISTSERV.IEEE.ORG>
Subject: Re: [PSES] Chamber grounding [General Use]
³But as soon as mains filters are mounted on the wall, one has to cope with
leakage currents (blind current) as large as 6 amp
, July 18, 2017 11:47 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
"But as soon as mains filters are mounted on the wall, one has to cope with
leakage currents (blind current) as large as 6 amp or more."
6 amps! At 230 volts, 50 Hz, Xc is
"But as soon as mains filters are mounted on the
wall, one has to cope with leakage currents (blind
current) as large as 6 amp or more."
6 amps! At 230 volts, 50 Hz, Xc is 38.8 ohms.
Total C from line to earth is 69.2 uF!
(Presumably the filter has an equal capacitance
from neutral to
@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
Warning Will Robinson - Brian is not an EMC expert.
Agree with Herr Gremmen about the referencing of equipotential points - this
was critical for my employer's current chamber because it was sitting next
to a machine shop and a HALT chamber
orp.com>
> Date: Tue, 18 Jul 2017 17:22:35 +
> To: <EMC-PSTC@LISTSERV.IEEE.ORG>
> Conversation: [PSES] Chamber grounding [General Use]
> Subject: Re: [PSES] Chamber grounding [General Use]
>
> Warning Will Robinson - Brian is not an EMC expert.
>
> Agree with Her
...@cetest.nl]
Sent: Tuesday, July 18, 2017 8:49 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Chamber grounding [General Use]
As for the purpose of operation, EMC chambers need no grounding.
The shielding property happens by conduction of the shield material the chamber
is made from.
But as soon
As for the purpose of operation, EMC chambers need no grounding.
The shielding property happens by conduction of the shield material the
chamber is made from.
But as soon as mains filters are mounted on the wall, one has to cope with
leakage currents
(blind current) as large as 6 amp or more
Hi All
Which is the best to use?
Ground each EMC chamber via an earth spike or back to the transformer of the
supply to the building?
Which is best practice?
Regards
Andy
Andrew Price
Land & Naval Defence Electronics Division
Prinicpal Environmental
-guide/
<http://learn.interferencetechnology.com/2017-emc-fundamentals-guide/>.
I also highly recommend Ralph Morrison’s excellent book, “Grounding and
Shielding - Circuits and Interference” (6th edition) and “Digital Circuit
Boards - Mach 1 GHz". At 92 years old and still teaching seminar
).
Gert Gremmen
From: Ken Wyatt [mailto:k...@emc-seminars.com]
Sent: Wednesday 28 June 2017 22:03
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
Bill, thanks for the complement. One of my mentors, Dr. Tom Van Doren, of the
University
There is that. But, at RF that’s more like an open circuit. J
Ghery
From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org]
Sent: Wednesday, June 28, 2017 2:22 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
22,300 mile
iki/The_Fountains_of_Paradise>.
From: Ghery S. Pettit [mailto:n6...@comcast.net]
Sent: Wednesday, June 28, 2017 1:55 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
Don’t forget those who claim that you cannot meet EMC requirements without a
good earth grou
persists.
Ghery S. Pettit
Pettit EMC Consulting LLC
gh...@pettitemcconsulting.com
From: Ken Wyatt [mailto:k...@emc-seminars.com]
Sent: Wednesday, June 28, 2017 1:03 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
Bill, thanks
connector shield filtered grounding
Bill, thanks for the complement. One of my mentors, Dr. Tom Van Doren, of the
University Missouri - Rolla, would say “the more different “ground” symbols he
saw in a schematic, the more business he knew he would get”.
Ken
some sort of EMI black
> hole that's by some means able to soak up all that excess RF energy. I'm
> sure we all could tell some stories from the lab.
>
>
> Bill
>
>
> From: Ken Wyatt [mailto:k...@emc-seminars.com]
> Sent: Wednesday, June 28, 2017 1:29 PM
>
F energy. I'm sure we all could
tell some stories from the lab.
Bill
From: Ken Wyatt [mailto:k...@emc-seminars.com]
Sent: Wednesday, June 28, 2017 1:29 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
Like they say in some movies…”fo
>
>
> -Original Message-
> From: Bill Owsley [mailto:00f5a03f18eb-dmarc-requ...@ieee.org
> <mailto:00f5a03f18eb-dmarc-requ...@ieee.org>]
> Sent: Saturday, June 24, 2017 8:33 PM
> To: EMC-PSTC@LISTSERV.IEEE.ORG <mailto:EMC-PSTC@LIST
, June 24, 2017 8:33 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] USB dongle connector shield filtered grounding
Ancient EMC mythology, well proven to be wrong and so abandoned decades ago.
And still it pops on occasion and often with new twists to revive the
mythology.So it gets ignored
or shield filtered grounding
>
>Ancient EMC mythology, well proven to be wrong and so abandoned decades ago.
>And still it pops on occasion and often with new twists to revive the
>mythology.So it gets ignored as those new to the stories, such that they
>cannot figure it out, will need th
RG
Sent: Friday, June 23, 2017 10:53 AM
Subject: Re: [PSES] USB dongle connector shield filtered grounding
#yiv4500181799 #yiv4500181799 -- _filtered #yiv4500181799 {panose-1:2 4 5 3 5 4
6 3 2 4;} _filtered #yiv4500181799 {font-family:Calibri;panose-1:2 15 5 2 2 2 4
3 2 4;}#yi
s Grasso
(w) 303-706-5467
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Thursday, June 22, 2017 11:21 AM
To: Grasso, Charles <charles.gra...@dish.com>; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] USB dongle connector shield filtered grounding
This message originated ou
You will find a lot of good, proven information about shield grounding for
balanced interconnects in the Journal of the Audio Engineering Society
Volume 43 Number 6 1995 June. Don't be put off by the 'audio'; the
techniques are valid up to 100 MHz or even higher.
Put simply, the cable shield
but I find it simultaneously
intriguing and
counter intuitive.
Q: Has this august forum heard of/seen/used this technique successfully?
TL/DR: Found new USB grounding technique, am suspicious of it, asking for
the forums help.
TIA
* ** *
Summary of techniques ca
) for the solution. Look
outside the box. Colorado Brian
-- Original Message --
From: "Brian O'Connell" <oconne...@tamuracorp.com>
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] grounding of output of solar inverter
Date: Tue, 16 Feb 2016 17:27:37 +
Reference arti
O'Connell [mailto:oconne...@tamuracorp.com]
Sent: Tuesday, February 16, 2016 6:59 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] grounding of output of solar inverter
Also, should have noted to reference the NDs in UL62109-1, which further
addresses below requirements, as stuff in North America
-PDFs/SAV4704.pdf
Brian
-Original Message-
From: Brian O'Connell [mailto:oconne...@tamuracorp.com]
Sent: Tuesday, February 16, 2016 9:28 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] grounding of output of solar inverter
Reference articles 250 and 690 of the NEC (NFPA70). Canada
Reference articles 250 and 690 of the NEC (NFPA70). Canada and Mexico code
similar.
Brian
From: Boštjan Glavič [mailto:bostjan.gla...@siq.si]
Sent: Monday, February 15, 2016 9:05 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] grounding of output of solar inverter
Dear experts,
Is anyone
with the grid). When
anti-islanding relays are open, I have an issue of grounding the neutral
conductor of output for homeloads. How can this grounding be achieved? Clause
19.2 does not allow grounding inside the unit (or I have understood it
incorrectly and it only prohibits fixed connection
In message
64D32EE8B9CBDD44963ACB076A5F6ABB026D18D3@Mailbox-Tech.lecotech.local,
dated Tue, 3 Mar 2015, Kunde, Brian brian_ku...@lecotc.com writes:
Is there a free on-line reference showing acceptable methods for ground
bonding? Screws vs studs? How to properly stack ground bond lugs on to
a
: [PSES] Serrated head screws for grounding/bonding
Is there a free on-line reference showing acceptable methods for ground
bonding? Screws vs studs? How to properly stack ground bond lugs on to a single
stud? Lock washers, star washers, lugs with serrated edges, screws with
serrated heads, etc
-
From: Brian Oconnell [mailto:oconne...@tamuracorp.com]
Sent: Monday, March 02, 2015 5:10 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws for grounding/bonding
The 'star' washer should be gas-tight seal. If a serrated-headed screw is even
less of seal, than higher
In message
blupr02mb116447b5e0b41fb24d139cfc1...@blupr02mb116.namprd02.prod.outlook
.com, dated Mon, 2 Mar 2015, Brian Oconnell oconne...@tamuracorp.com
writes:
The 'star' washer should be gas-tight seal.
But it has much less thermal capacity than a screw. It would require a
much higher
Anyone else observe failure modes of ground-bond
hardware?
Of course not. All ground-bond constructions (in
certified equipment) comply with the requirements.
:-)
Best regards,
Rich
-
This message is from the IEEE Product Safety
In message 000c01d0552a$0f3b3430$2db19c90$@cox.net, dated Mon, 2 Mar
2015, Ed Price edpr...@cox.net writes:
That said, for many projects, I have found that coating the assembly
with ?liquid plastic? (the red, viscuous goop sold at Radio Shack for
coating handles on pliers, which air-cures to
and specifications for acceptable materials and combinations of ground bond
hardware. Recommended.
Brian
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, March 02, 2015 11:47 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws for grounding
.
-Dave
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, March 02, 2015 2:33 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws for grounding/bonding
In message 001401d0546c$35404530$9fc0cf90$@ieee.org, dated Sun, 1 Mar 2015
In message
bn3pr0801mb0979d630986f7da449ab594285...@bn3pr0801mb0979.namprd08.prod.o
utlook.com, dated Tue, 3 Mar 2015, Nyffenegger, Dave
dave.nyffeneg...@bhemail.com writes:
I had an application where the tab used for bonding the sheet metal
cover was spot welded to the cover. Inside were
for grounding/bonding
In message
mailto:752831402.610104.1425186818324.javamail.ya...@mail.yahoo.com
752831402.610104.1425186818324.javamail.ya...@mail.yahoo.com, dated Sun, 1
Mar 2015, Bill Owsley mailto:00f5a03f18eb-dmarc-requ...@ieee.org
00f5a03f18eb-dmarc-requ...@ieee.org
writes
was not authorized
construction.
This was my first experience with 'compliance engineering' .
Brian
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Sunday, March 01, 2015 11:33 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws for grounding
paint and secure
or add topical materials to prevent corrosion under the lug?
Thanks
Rick
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Monday, March 02, 2015 12:33 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws for grounding
In message
blupr01mb147fdd3012fb376eb4f317294...@blupr01mb147.prod.exchangelabs.com
, dated Mon, 2 Mar 2015, Rick Busche rick.bus...@qnergy.com writes:
Should we removing paint and secure or add topical materials to prevent
corrosion under the lug?
Definitely remove paint, because the
In message
blupr02mb1160acb7f7c87a911caabc6c1...@blupr02mb116.namprd02.prod.outlook
.com, dated Mon, 2 Mar 2015, Brian Oconnell oconne...@tamuracorp.com
writes:
Saw exactly this happen on flight deck of USS Midway during 1979. While
troubleshooting APD10 radar, the hydraulics guy that was
OTOH, there is still that possibility of a heavy
fault current blasting away tiny point-contact
conduction paths.
For non-military commercial and domestic products:
Normal current in the protective grounding
(earthing) conductor is about 1 milliampere.
Fault current is about
In message
752831402.610104.1425186818324.javamail.ya...@mail.yahoo.com, dated
Sun, 1 Mar 2015, Bill Owsley 00f5a03f18eb-dmarc-requ...@ieee.org
writes:
ps. and use compatible metals that are less than ?? emf volts apart,
Note that the table of contact potentials in some IEC safety
In message 001401d0546c$35404530$9fc0cf90$@ieee.org, dated Sun, 1 Mar
2015, Richard Nute ri...@ieee.org writes:
OTOH, there is still that possibility of a heavy fault current blasting
away tiny point-contact conduction paths.
I wonder whether that actually happens. It seems to me that the
...@gmail.com]
Sent: Saturday, February 28, 2015 9:18 AM
To: Ed Price
Subject: Re: [PSES] Serrated head screws for grounding/bonding
Ed,
The idea of not using a star washer for military use may be at odds with
some of the international standards I use. I fully agree that clean
non-painted surfaces
In message 002401d05392$9e74cdd0$db5e6970$@cox.net, dated Sat, 28 Feb
2015, Ed Price edpr...@cox.net writes:
BTW, the military system also emphasizes that you are not done when you
torque the fastener; you still have to protect the assembly with some
coating (like varnish or liquid plastic or
...@cox.net
To: EMC-PSTC@LISTSERV.IEEE.ORG
Sent: Saturday, February 28, 2015 3:10 PM
Subject: Re: [PSES] Serrated head screws for grounding/bonding
!--#yiv1485224167 _filtered #yiv1485224167 {font-family:Wingdings;panose-1:5 0
0 0 0 0 0 0 0 0;} _filtered #yiv1485224167 {font-family:Wingdings
graphics within posts, so we’ll just
have to imagine it.
MIL-HDBK-1857 is much more current; it has a number of examples of bonding and
says essentially the same thing:
3.2.6 Grounding requirements. A ground stud shall be provided on equipment. The
ground stud shall provide
Good morning.
I am reviewing the suitability of serrated head screws in grounding and
bonding applications. I am aware that these screws are good at resisting
vibration, but I've not seen them used for grounding and bonding purposes.
I question this application since, while the serrations
Hi Peter:
If the serrated head screw is suitable for a mains circuit connection, it is
suitable for a PE circuit connection.
The biggest problem is whether a certification house will accept the
construction. Be prepared (plan B) to replace the screw with a conventional
screw and lockwasher.
to form a gas-tight connection, allowing
degradation of the grounding/bonding interface over time.
It obviously depends on the shape of the serrations and the tightening
torque. What matters is the pressure at the junctions between the tips
of the serrations and the substrate. Serrations
Tarver [mailto:ptar...@enphaseenergy.com]
Sent: Thursday, February 26, 2015 11:39 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Serrated head screws for grounding/bonding
Good morning.
I am reviewing the suitability of serrated head screws in grounding and bonding
applications. I am aware
against the ground structure.
Ed Price
WB6WSN
Chula Vista, CA USA
Good morning.
I am reviewing the suitability of serrated head screws in grounding and bonding
applications. I am aware that these screws are good at resisting vibration,
but I've not seen them used for grounding
Dear Members,
Could you please share your experience and/or knowledge for the ground
plane grounding in the immunity lab?
We plan to layout a L shape ground plane in the 24' x 18' area for ESD,
etc. tests. The corner of the L shape is right next to a 10 wide building
collar. Is a ground strap
Grounding in the Immunity Lab
Dear Members,
Could you please share your experience and/or knowledge for the ground
plane grounding in the immunity lab?
We plan to layout a L shape ground plane in the 24' x 18' area for ESD,
etc. tests. The corner of the L shape is right next to a 10 wide
Plane Grounding in the Immunity Lab
Dear Members,
Could you please share your experience and/or knowledge for the ground plane
grounding in the immunity lab?
We plan to layout a L shape ground plane in the 24' x 18' area for ESD, etc.
tests. The corner of the L shape is right next
Grace,
On Fri, 23 Aug 2013 09:03:35 -0400,
Grace Lin graceli...@gmail.com wrote:
Could you please share your experience and/or knowledge for the ground
plane grounding in the immunity lab?
We plan to layout a L shape ground plane in the 24' x 18' area for ESD,
etc. tests. The corner
]
Sent: Friday, August 23, 2013 6:04 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Ground Plane Grounding in the Immunity Lab
Dear Members,
Could you please share your experience and/or knowledge for the ground plane
grounding in the immunity lab?
We plan to layout a L shape ground plane
Keep in mind that a primary purpose of grounding the plane is electrical safety.
Ghery S. Pettit
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Flavin, John
Sent: Friday, August 23, 2013 11:55 AM
To: emc-p...@ieee.org
Subject: RE: [PSES] Ground Plane Grounding in the Immunity
In message
beec1fc38f37bc4da6df70db9d7d0e3608d9c...@sushdc8002.td.teradata.com,
dated Fri, 23 Aug 2013, Flavin, John john.fla...@teradata.com
writes:
Our lab is used for testing of ITE products to the IEC 55024 (CISPR24)
immunity standard.
Not IEC 55024, which does not exist, but EN 55024.
In message 1369188828.49145.yahoomail...@web160402.mail.bf1.yahoo.com,
dated Tue, 21 May 2013, Bill Owsley wdows...@yahoo.com writes:
It is the definition of zero impedance since there can be none lower.
I think that is the point; it's NOT zero. It may be the lowest
obtainable but it is
...@ieee.org [mailto:emc-p...@ieee.org] Namens John Woodgate
Verzonden: woensdag 22 mei 2013 8:35
Aan: EMC-PSTC@LISTSERV.IEEE.ORG
Onderwerp: Re: Single Point Grounding - Not Achievable at High
Frequencies (greater than a few MHz)
In message 1369188828.49145.yahoomail...@web160402.mail.bf1.yahoo.com,
dated
In message FCA549BE3ECF9D4CB8CB8576837EA489140EC8@ZEUS.cetest.local,
dated Wed, 22 May 2013, ce-test, qualified testing bv - Gert Gremmen
g.grem...@cetest.nl writes:
The real problem is that we forgot that current flow in loops
(Thevenin?)
Helmholz 1853 Thévenin 1883, but Ohm (1827) may
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