Electronics > Projects, Designs, and Technical Stuff
What style wire is this? (Thin insulation, almost like Kynar/wire-wrap)
<< < (4/4)
TimNJ:

--- Quote from: thermistor-guy on December 19, 2018, 12:15:51 am ---
--- 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.

--- End quote ---

Thanks for your research! I wonder if that makes it truly "rated for 500V". I guess as long as the insulation doesn't completely break down, it's an "insulator" at that voltage.

Surely all wire manufacturers test the dielectric strength of their insulation...just to know, for their own sake, right? Even if it had a 20V rating, as the designer, I at least want to know whether or not the product is suitable for the intended application.

TimNJ:

--- Quote from: DaJMasta on December 18, 2018, 11:29:00 pm ---
--- 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.

--- End quote ---

Maybe. I just figure...of all the test-able properties of a wire, I would not expect withstand voltage to be one that would be skipped over because "they didn't feel like it".

Just need two colors! I know magnet wire comes in standard orange-y color, red, and green. Would be no problem to get, although aesthetically, I don't know how much I like it. But it is definitely a good thought! Thanks.
TimNJ:

--- Quote from: mariush on December 19, 2018, 12:59:55 am ---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.

--- End quote ---

Now that's a great idea. Great way to get lots of colors without buying 10x100feet of standard hookup wire.
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod