Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > sci.electronics.misc > #5011
| From | Mike Mocha <mocha@mailexcite.com> |
|---|---|
| Subject | Rubber beading on high voltage cable insulation |
| Newsgroups | sci.electronics.design, sci.electronics.misc, sci.electronics.repair |
| Organization | --==RHW==-- |
| Message-ID | <xDNBK.51174$BZ1.39624@fx03.iad> (permalink) |
| Date | 2022-07-20 06:53 +0000 |
Cross-posted to 3 groups.
Hey all, Just curious what you think about this. The photos at the link are showing large gauge wire used on a vintage 600 VDC rail vehicle. We're talking 1930's electric streetcar technology. Basically 600 VDC connected to a knife switch, then to a rotating manual controller which you partially see in the photo. The rotation of it sets up the series and parallel stages to the traction motors. 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
Back to sci.electronics.misc | Previous | Next — 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
csiph-web