"Ring, Ridge, Red, Right" was the equivalence in the days when Telephone Operator Cord Boards had tip/ring/sleeve connectors on the cords. So Ridge = Red.
Thanks Brough ________________________________ From: AF <af-boun...@af.afmug.com> on behalf of Robert <i...@avantwireless.com> Sent: Monday, January 8, 2024 10:32 PM To: af@af.afmug.com <af@af.afmug.com> Subject: Re: [AFMUG] -48V kicking the dead horse But what about Low voltage cable... Is smooth hot or cold or ridged hot or cold? So many choices... LOL.. On 1/8/24 9:39 AM, dmmoff...@gmail.com wrote: > I concur with the wire color problem. > > * My current employer pays big bucks to a low voltage guy who wires up our > sites. His work is absolutely beautiful. It's like friggin artwork. > He uses black for return (+) and green for ground. Then since most of our > equipment has dual power supplies he uses red and blue for the "A" hot and > "B" hot. I assume his employer trained him that way for a reason and that's > probably common. > > * I was taught in childhood that red is positive, so that's what I have > always done. I'm not philosophically opposed to the idea that red is "hot", > but that's just now how I learned it. > > * > https://nam10.safelinks.protection.outlook.com/?url=https%3A%2F%2Fztlabels.com%2Fblogs%2Fnews%2Fdc-power-circuit-wiring-color-codes&data=05%7C02%7Cbrough%40netblazr.com%7C6c42b49a25dd404e07d908dc1099eb1a%7C06a97f73bf7b45a688f6a3a7bc5f56c7%7C0%7C0%7C638403500474986051%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=NwfihmgJY1P%2FJX8FZ9QQK%2Fbx95TQIV3AqoM5Wowvai0%3D&reserved=0<https://ztlabels.com/blogs/news/dc-power-circuit-wiring-color-codes> > This site advises that for 2-wire DC with positive ground is white for > positive and black for negative. Someone apparently thinks that's the right > way. The same site points out that the only color called out specifically > in the NEC is green or green/yellow for ground. Everything else is just the > convention people landed on. > > Out in the wild you might see anything so there is and will always be a > multi-meter in my everyday toolkit. > > -Adam > > > > -----Original Message----- > From: AF <af-boun...@af.afmug.com> On Behalf Of Ken Hohhof > Sent: Monday, January 08, 2024 12:01 PM > To: 'AnimalFarm Microwave Users Group' <af@af.afmug.com> > Subject: Re: [AFMUG] -48V kicking the dead horse > > What I can never decide on is wire colors. Especially when using red/black > zipcord or tray cable. People expect red to be +, but they also expect > black to be ground (except electricians who expect black to be hot and white > to be neutral and green or green/yellow to be ground). And how to > differentiate battery wiring from load wiring. I have not found an ideal > solution other than labels. > > -----Original Message----- > From: AF <af-boun...@af.afmug.com> On Behalf Of Bill Prince > Sent: Monday, January 8, 2024 10:45 AM > To: af@af.afmug.com > Subject: Re: [AFMUG] -48V kicking the dead horse > > Yes. -48VDC means the negative side is hot, and the positive side is ground > (or return). > > You can mix +48VDC and -48VDC if you know what you're doing. It helps a > bunch if the equipment floats logic ground. You need to check to see if your > equipment isolates logic from the supply voltage. > > Yes. Batteries can be grounded either way. They don't care. > > bp > <part15sbs{at}gmail{dot}com> > > On 1/8/2024 8:25 AM, Mark - Myakka Technologies wrote: >> I know we have been though this many times and I thought I understood it. >> >> -48VDC is the Negative side being HOT, correct? >> >> It is BAD to try to mix -48VDC and 48VDC >> >> There is no such thing as a -48V battery. A battery is a battery, > correct? >> How about the ICT Platinum power supplies. They show as 48VDC, can >> they > be used on -48VDC equipment? >> I remember Check saying something about a way to test to see if a >> piece of > equipment that is Neg 48VDC is truly grounded as Neg 48VDC. >> >> -- >> >> Thanks, >> Mark mailto:m...@mailmt.com >> >> Myakka Communications >> https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.myakka.com%2F&data=05%7C02%7Cbrough%40netblazr.com%7C6c42b49a25dd404e07d908dc1099eb1a%7C06a97f73bf7b45a688f6a3a7bc5f56c7%7C0%7C0%7C638403500474986051%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=FlUnCHHmZ9Qohes%2BwvKB9GMSitPQuiBOFVDDBFJOdNw%3D&reserved=0<http://www.myakka.com/> >> >> > -- > AF mailing list > AF@af.afmug.com > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Faf.afmug.com%2Fmailman%2Flistinfo%2Faf_af.afmug.com&data=05%7C02%7Cbrough%40netblazr.com%7C6c42b49a25dd404e07d908dc1099eb1a%7C06a97f73bf7b45a688f6a3a7bc5f56c7%7C0%7C0%7C638403500474986051%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W4ae6%2BBhIlrnp5MAljr6A90TUuuoPVYegAwi%2BxN0aH4%3D&reserved=0<http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > > > -- > AF mailing list > AF@af.afmug.com > https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Faf.afmug.com%2Fmailman%2Flistinfo%2Faf_af.afmug.com&data=05%7C02%7Cbrough%40netblazr.com%7C6c42b49a25dd404e07d908dc1099eb1a%7C06a97f73bf7b45a688f6a3a7bc5f56c7%7C0%7C0%7C638403500474986051%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W4ae6%2BBhIlrnp5MAljr6A90TUuuoPVYegAwi%2BxN0aH4%3D&reserved=0<http://af.afmug.com/mailman/listinfo/af_af.afmug.com> > > -- AF mailing list AF@af.afmug.com https://nam10.safelinks.protection.outlook.com/?url=http%3A%2F%2Faf.afmug.com%2Fmailman%2Flistinfo%2Faf_af.afmug.com&data=05%7C02%7Cbrough%40netblazr.com%7C6c42b49a25dd404e07d908dc1099eb1a%7C06a97f73bf7b45a688f6a3a7bc5f56c7%7C0%7C0%7C638403500474986051%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=W4ae6%2BBhIlrnp5MAljr6A90TUuuoPVYegAwi%2BxN0aH4%3D&reserved=0<http://af.afmug.com/mailman/listinfo/af_af.afmug.com>
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