They break at the pole. From: Adam Moffett Sent: Friday, October 26, 2018 9:43 AM To: [email protected] Subject: Re: [AFMUG] Drop cable tensile strength
So what breaks when they wear themselves out? Is the cable intact with a broken fiber inside? Does it get pinched at the hanger hardware? -Adam On 10/26/2018 11:30 AM, Chuck McCown wrote: They will dance in the wind and wear themselves out, and ice loading as previously mentioned. The longer the drop the more ice weight will accumulate. From: Adam Moffett Sent: Friday, October 26, 2018 9:26 AM To: [email protected] Subject: Re: [AFMUG] Drop cable tensile strength Response from FS: "" Hi Adam, Hope you are fine~ For your question of the long-term tensile strength, I checked with our product Dept. The specification is correct and we can provide the long-term tensile strength with 1200N, hope you know that. "" Maybe drop cable can go farther than I thought. I guess I still don't understand why the Corning drop cable with a pair of fiberglass rods down the side can handle 400N while the FS drop cable with a pair of fiberglass rods down the side can handle 1200N. Is the strength member not the limiting factor? Is Corning just being more conservative than FS? If you hang the drop cable too far, what failure actually occurs? On 10/25/2018 2:01 PM, Chuck McCown wrote: That fiber glass central strength member is pretty strong. I think you could use it as a tow rope. From: Chris Fabien Sent: Thursday, October 25, 2018 11:34 AM To: AnimalFarm Microwave Users Group Subject: Re: [AFMUG] Drop cable tensile strength My guess it will not be much different strength than corning drop. FS does make some drop with steel wire reinforcement, I'm not sure if that would be any better because of the higher weight. On Thu, Oct 25, 2018, 12:48 PM Adam Moffett <[email protected]> wrote: This cable at FS: https://www.fs.com/index.php?main_page=product_info&products_id=31945 Their web page is saying long term tensile strength of 1200N. Corning ST drop cable has a similar type of strength member and they say 400N. At 1200N it would appear that I could hang that cable 600 feet with a 1% sag and I'd still be within strength limits. So is this a lie like the horsepower on a shop vac, or could they be using some alternate but valid way of measuring tensile strength, or could it actually be correct? I sometimes pretend I'm an engineer, but I'm wondering if any of you real engineers out there have any insight. Thanks, Adam -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com ---------------------------------------------------------------------------- -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com ------------------------------------------------------------------------------ -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com -------------------------------------------------------------------------------- -- AF mailing list [email protected] http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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