See http://www.nyelubricants.com/pdf/760g.pdf
Order from http://www.lighthound.com/NyoGel-760G-10-gm-tube_p_1343.html
Bob
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Bob Landman
Sent: Wednesday, March 31, 2010 7:39 PM
To: [log in to unmask]
Subject: Re: [TN] Failed Ring Terminal
Water (condensation) plus air pollution makes anything except a gas tight crimped terninal slowly corrode individual strands. Then the current carrying capability of the wire bundle decreases and the joint begins to be resistive and heat. The heat accelerates the oxidation/ corrosion.
Instead of solder, try Nyogel 760G connector grease worked into the strands. Put it also on both sides of the ring as well. Recommended by Molex, used by auto and golf cart industry. Fantastic stuff - 2oz tube will last you a long time.
Bob Landman
H&L Instruments, LLC
Sent from my iPhone
On Mar 31, 2010, at 5:37 PM, Robert Kondner <[log in to unmask]> wrote:
> Paul,
>
> I agree. Soldering takes SO much longer and it can make a mess of the
> insulation, looks bad. But, if this terminal had been soldered it
> would still be working.
>
> Though, 40 Years in my Dad's barn is more than I would asks of
> ANYTHING!
>
> Bob Kondner
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Paul Edwards
> Sent: Wednesday, March 31, 2010 5:24 PM
> To: [log in to unmask]
> Subject: Re: [TN] Failed Ring Terminal
>
> Bob,
>
> A soldered crimp terminal is best for high reliability joints...
>
> The surface of the individual strands of wire that makeup the
> conductor oxidize (and/or corrode) because they are exposed to the
> environment and increase the strand to strand resistance... As the
> current travels from the conductor core to the contact surface area of
> the crimp connector it differentially heats the strands in the
> conductor until you preferred current paths... The Cu then starts to
> thermal cycle under load and causes crystallization and failure of the
> Cu...
>
> A solid solder joint eliminated this problem because of the soldered
> Cu interfaces are complete involved in the solder joint.
>
> Paul
>
> Paul Edwards
> Surface Art Engineering
>
>
> -----Original Message-----
> From: TechNet [mailto:[log in to unmask]] On Behalf Of Robert Kondner
> Sent: Wednesday, March 31, 2010 12:55 PM
> To: [log in to unmask]
> Subject: [TN] Failed Ring Terminal
>
> Hi,
>
>
>
> Why would a crimped ring terminal fail and over heat? Can anyone
> suggest failure modes as to why the resistance would increase?
>
>
>
> I would guess a soldered connection would be better?
>
>
>
> See www.kondner.com/files/failedringterm.jpg
>
>
>
> That insulator was yellow at one time it is now brown and the
> insulation at that end of the wire is very brittle. The wire size is
> #10.
>
>
>
> This ring terminal came from a Furnas Electric motor starter for a 5hp
> 240V AC motor that draws about 28 amps. It was installed back in 1968.
> It was installed in a dingy barn in a silo pit where most of the steel
> enclosures are covered with rust. All kinds of nasty odors as there
> are plenty of cows in the area. It is quite amazing that it went this
> long, but I wonder why it failed.
>
>
>
> The crimp seemed tight but it had obviously over heated. Other such
> ring terminal on the same circuit are fine. The crimps were made in
> the factory and not by some guy with a simple hand tool.
>
>
>
> I ground off the edges which allowed me to open the crimp with minimal
> wire damage. I was surprised that much of the wire looked quite clean.
>
>
>
> I am just curious what folks would suggest.
>
>
>
> Thanks,
>
> Bob Kondner
>
>
>
>
>
>
>
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or
> [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
> unsubscribe, send a message to [log in to unmask] with following text in
> the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt
> or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing
> per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at:
> http://listserv.ipc.org/archives Please visit IPC web site
> http://www.ipc.org/contentpage.asp?Pageid=4.3.16
> for additional information, or contact Keach Sasamori at
> [log in to unmask] or 847-615-7100 ext.2815
> -----------------------------------------------------
>
>
> ===
> ===
> ======================================================================
> ==
>
> This email and any attachments thereto may contain private,
> confidential, and privileged material for the sole use of the intended
> recipient. Any review, copying, or distribution of this email (or any
> attachments thereto) by others is strictly prohibited.
> If you are not the intended recipient, please contact
> [log in to unmask]
> immediately and permanently delete the original and any copies of this
> email and any attachments thereto.
>
> ===
> ===
> ======================================================================
> ==
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following
> text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to
> [log in to unmask]: SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to
> [log in to unmask]: SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
> for additional information, or contact Keach Sasamori at [log in to unmask]
> or
> 847-615-7100 ext.2815
> -----------------------------------------------------
>
>
> ______________________________________________________________________
> This email has been scanned by the MessageLabs Email Security System.
> For more information please contact helpdesk at x2960 or [log in to unmask]
> ______________________________________________________________________
>
> ---------------------------------------------------
> Technet Mail List provided as a service by IPC using LISTSERV 15.0
> To unsubscribe, send a message to [log in to unmask] with following
> text in
> the BODY (NOT the subject field): SIGNOFF Technet
> To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]
> : SET Technet NOMAIL or (MAIL)
> To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]
> : SET Technet Digest
> Search the archives of previous posts at: http://listserv.ipc.org/archives
> Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16
> for additional information, or contact Keach Sasamori at [log in to unmask]
> or 847-615-7100 ext.2815
> -----------------------------------------------------
>
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
______________________________________________________________________
This email has been scanned by the MessageLabs Email Security System.
For more information please contact helpdesk at x2960 or [log in to unmask]
______________________________________________________________________
---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------
|
