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Groups > sci.electronics.design > #667133
| From | Dan Purgert <dan@djph.net> |
|---|---|
| Newsgroups | sci.electronics.design, sci.electronics.misc, sci.electronics.repair |
| Subject | Re: Rubber beading on high voltage cable insulation |
| Followup-To | sci.electronics.misc |
| Date | 2022-07-20 11:10 +0000 |
| Organization | A noiseless patient Spider |
| Message-ID | <slrntdfom0.hjh.dan@djph.net> (permalink) |
| References | <xDNBK.51174$BZ1.39624@fx03.iad> |
Cross-posted to 3 groups.
Followups directed to: sci.electronics.misc
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 Mike Mocha wrote: > Hey all, > >[...] > We see this weird rubber beading occurring on the outside of the older > wire insulation. I'm not sure what that insulation is made of or how old > it is. This only seems to occur on the older wires. The newer NFPA > compliant wires don't have this symptom. > > What is it and what causes it? Any theories? Thanks. > > https://imgur.com/a/OqHQV8U If it's anything like the HV wiring in 1940s/50s era locomotives that I've worked on restoring, the insulation is essentially some kind of cloth dipped in tar (pitch, whatever). -----BEGIN PGP SIGNATURE----- iQIzBAEBCgAdFiEE3asj+xn6fYUcweBnbWVw5UznKGAFAmLX4r8ACgkQbWVw5Uzn KGBa2hAAqZIbvcFzPuXRMfcvEF/CZ1EhEWQ03Wt/49rP4zlsOEx2Uv+WgQZtbxVo MReEcR10cL4uXqRENQZsD6hFeMqDLE98SWG8B9U49/KZfkoeVsLu5836tAR56DZz n7L6mY842B/jElo4YxHN6SDG4oti231AkXY4kxvOrdjdM3Me9qMrYVg9fhrE+nlI OIj9b7UTus1zUYjrpt8A++9T9Jz6MOIl1IebGNtyeZWIxN/3s7AlLBpo70+j3Anj t99Lzg4e7toXPPzuLSJLKPhkxpceoALnHVrYOSfAQnrQeiNyBF89cMlLa1fc3od8 Q9FxPpHr03QSKYEqiQU/LzsghTl1gBxJQBOhERc2Hgxh83/g1Y5ViM9+QBd9/NiA aBQ7z2ReCjsXgskPeKs/g+uDJUp306jpblYcxlL9UfwptNxyTAh5aIVEOzOuJPvG Q/QW6DMhnfYA890HDmoJ3A/3ToGxwrY6b9k4XJBqsNcxS4CaajZjIjF3Vb1QK/K1 QIZDNrmzewBHMsiKUeFrulwpxb4rSYY+CeinAR5kDYp69EKgLQpNh8YA+7oaapu7 hEdlRHL4QepYl1toYqs+nkWG6BAowFSwU8f/mSoxsq58AKd4uxtFNIuytlv7gAX0 Jrtz+orxFyOVV2tOpGOEsACuZjM0Z9dBOQ5QP8WKPjsxxu0bgTw= =V/lA -----END PGP SIGNATURE----- -- |_|O|_| |_|_|O| Github: https://github.com/dpurgert |O|O|O| PGP: DDAB 23FB 19FA 7D85 1CC1 E067 6D65 70E5 4CE7 2860
Back to sci.electronics.design | Previous | Next — Previous in thread | Next in thread | Find similar
Rubber beading on high voltage cable insulation Mike Mocha <mocha@mailexcite.com> - 2022-07-20 06:53 +0000
Re: Rubber beading on high voltage cable insulation TTman <kraken.sankey@gmail.com> - 2022-07-20 11:02 +0100
Re: Rubber beading on high voltage cable insulation Dan Purgert <dan@djph.net> - 2022-07-20 11:10 +0000
Re: Rubber beading on high voltage cable insulation "ChrisND@privacy.net" <chrisnd@privacy.net> - 2022-07-20 15:40 +0100
Re: Rubber beading on high voltage cable insulation Mike Mocha <mocha@mailexcite.com> - 2022-07-22 06:21 +0000
Re: Rubber beading on high voltage cable insulation Joe Gwinn <joegwinn@comcast.net> - 2022-07-20 11:14 -0400
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