m...@alignedsolutions.com said: > Actually I may be misremembering this. Am not sure if the cable I used > was Teflon on not. It did have a defined fire rating though, and I was > concerned about it's phase stability vis a vis temperatures.
I was at Xerox in the late '70s when the DEC-Intel-Xerox work on Ethernet was going on. The Los Angeles fire dept was sensitive to smoke from cables. A friend got a chunk of potential cable from Belden. It was Teflon coated. I don't know what was inside. He took it out on his back porch and hit it with a propane torch. It ignored him. Well, not quite. It got smudged a bit, but that wiped off. He took a bigger chunk to Underwriters Lab in Chicago. They have a setup for testing cables. It's a cable tray in an enclosure that's 20 ft long and a few feet wide and 3 or 4 feet tall. A big gas pipe goes in one end. There is a chimney at the other. They put the cable in, replace the lid and light it up. The Teflon cable didn't have any problems. Teflon is expensive. After a couple of years somebody worked out a cheaper compound that was good enough for the fire people. -- These are my opinions. I hate spam. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.