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| What style wire is this? (Thin insulation, almost like Kynar/wire-wrap) |
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| mikeselectricstuff:
--- Quote from: TimNJ on December 18, 2018, 06:36:50 pm ---Does anyone know why Kynar wire-wrap doesn't have a voltage rating? Something with the consistency/reliability of the insulation? It's used all over the place. You'd think it would have some sort of rating. --- End quote --- I think the answer is that if you're concerned about voltage rating, you probably shouldn't be using wirewrap wire... |
| TimNJ:
--- Quote from: mikeselectricstuff on December 18, 2018, 09:44:46 pm --- --- Quote from: TimNJ on December 18, 2018, 06:36:50 pm ---Does anyone know why Kynar wire-wrap doesn't have a voltage rating? Something with the consistency/reliability of the insulation? It's used all over the place. You'd think it would have some sort of rating. --- End quote --- I think the answer is that if you're concerned about voltage rating, you probably shouldn't be using wirewrap wire... --- End quote --- Maybe. Chances that 24VDC is going to break through insulation is almost exactly 0%. Just wondering why they didn't slap like a token 50V rating on it or something. |
| DaJMasta:
--- Quote from: TimNJ on December 18, 2018, 09:58:52 pm --- Maybe. Chances that 24VDC is going to break through insulation is almost exactly 0%. Just wondering why they didn't slap like a token 50V rating on it or something. --- End quote --- Maybe they just didn't want to spend the time actually testing it? The spool of small wire wrap wire I have lists UL1422/UL1423 compliance (4 AWGs on the sticker, so the insulator is one or the other), neither is voltage rated but has some other basic specifications. Closest I've seen to an actual voltage rating. How many colors do you need? Magnet wire could still be an option if you don't need many, you can get a few colors of enamel, but if you're looking for more than 3 or 4 it's going to be tough to find one supplier with a range that bothers with a rainbow of colors without a special order. |
| thermistor-guy:
--- Quote from: TimNJ on December 18, 2018, 06:36:50 pm ---Does anyone know why Kynar wire-wrap doesn't have a voltage rating? Something with the consistency/reliability of the insulation? It's used all over the place. You'd think it would have some sort of rating. --- End quote --- Looks like 300 V for MIL/SAE spec. wire: https://www.awcwire.com/productspec.aspx?id=mil-w-81822/3 MIL-W-81822A specifies an insulation resistance test at 500 V. See par. 4.6.19 in: http://everyspec.com/MIL-SPECS/MIL-SPECS-MIL-W/MIL-W-81822A_5315/ But you have raised a good question. If commonly available Kynar w/w wrap wire is only good for, say, 150 V at 105 deg. C, why do vendors not state that? Hmm. |
| mariush:
You could also look at ribbon cables. There are such cables with AWG28 and even thinner wires. Heres some examples: 18.5$ (0.13$ per meter) : https://www.digikey.com/product-detail/en/assmann-wsw-components/AWG28-9-G-300/AE09M-50-ND/686343 Number of Conductors 9 Pitch 0.050" (1.27mm) Length 50.0' (15.24m) Wire Gauge 28 AWG Conductor Strand 7 Strands / 36 AWG 462$ ( 50 x 91.4 meters = 4,572 meters of wire, $0.10 per meter ) : https://www.digikey.com/product-detail/en/assmann-wsw-components/AWG28-50-F-1-300/AE50B-300-ND/2391665 Number of Conductors 50 Pitch 0.039" (1.00mm) Length 300.0' (91.44m) Wire Gauge 28 AWG Conductor Strand 7 Strands / 36 AWG Shielding Unshielded Jacket Color Multiple Ribbon Thickness 0.035" (0.89mm) Ribbon Width 1.969" (50.01mm) 10 different colors ... you can use a sharp blade to make a cut and the simply separate two wires from the ribbon. |
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