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
, a second layer is also easy, and it removes like a rubber glove.
Ed Price
WB6WSN
Chula Vista, CA USA
-Original Message-
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: Sunday, March 01, 2015 12:20 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Serrated head screws
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
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0 0 0 0 0 0 0 0;} _filtered #yiv1485224167 {font-family:Wingdings
]
Sent: Friday, February 27, 2015 5:59 AM
To: Ed Price
Subject: RE: [PSES] Serrated head screws for grounding/bonding
Dear Ed,
I red your posting and I have a question: you specified “The washer is placed
between the nut and the top face of the flat lug, never between the lug
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.
In message 16ad10a67c6df27b6a7e5fbe13b3c...@mail.gmail.com, dated Thu,
26 Feb 2015, Peter Tarver ptar...@enphaseenergy.com writes:
I question this application since, while the serrations oppose
loosening of the screw, they do not bite into the metal beneath the
head and also seem unlikely to
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
Peter:
The military doesn’t like that method. I think the primary reason is that the
serrations form small point-contact connections, and, under heavy fault
current, these little points will melt and/or vaporize. The military prefers a
strap which terminates in a flat ring-lug, with the lug
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