Twisted Resistance List: Help

[Lost]

Looking for anyone who has already measured resistance of twisted wires. Maybe just a link to a popular site I've missed.

Immediate need:
I will be adding Kanthal resistance numbers to Steam Engine for coil builds. Already have wires made... including 32 gauge... 2-strand to 6-strand. Others on the way.

As I get numbers, I will be adding to the Kanthal numbers below. I have a similar lists for Ti, Ni200 and Nichrome.
32 gauge: .2 mm: 13.75 ohm per foot
31 gauge: .22 mm: 10.94 ohm per foot
30 gauge: .25 mm: 8.36 ohm per foot
29 gauge: .28 mm: 6.88 ohm per foot
28 gauge: .32 mm: 5.27 ohm per foot
27 gauge: .36 mm: 4.32 ohm per foot
26 gauge: .4 mm: 3.21 ohm per foot
25 gauge: .45 mm: 2.72 ohm per foot
24 gauge: .51 mm: 2.04 ohm per foot
23 gauge: .57 mm: 1.71 ohm per foot
22 gauge: .64 mm: 1.13 ohm per foot
21 gauge: .72mm: 1.07 ohm per foot
20 gauge: .81 mm: .81 ohm per foot

Thanks.

 

[fratervapor]

So the numbers posted above are for single strands?

 

[Lost]

I'm an idiot. Steam Engine actually has a Wire Wizard. (How long has that been there?)

It does mention "twist pitch," which I've never heard of before. But that shouldn't be too hard to dig up. If I get any interesting info after playing, I'll pass it along.

So the numbers posted above are for single strands?

Correct. Here's an interesting comparison that has nothing to do w/ twisted... just something semi-related I was working on at the moment.

26 GAUGE
Kanthal: 3.21 ohm per foot
NiChrome: 2.5711 ohm per foot
Titanium: 0.53 ohm per foot
Ni200: 0.2373 ohm per foot

 

[heateris]

I found that twisted 28g is almost the same ohm's as 26g. I don't know if other gauges follow suit.


Sent from my iPhone using Tapatalk

 

[Lost]

I found that twisted 28g is almost the same ohm's as 26g.

32 twisted is really close to either 29 or 30... it's in the other computer. That's the only other gauge I've checked so far.

 

[JERUS]

Aye heateris, it's in general pretty darn close to simply taking 2 gauges off. It's not exact, but in general you can say take 26g twisted and it'll work like a 24g, the difference is the heat dissipation. Twisted runs much cooler than the comparable lower gauge. Personally I use that to my advantage. If I run a coil at say 24g SS, typically it's a bit too hot, later in the pull it becomes too much. Twist up 26g SS and it's just about perfect.

Right now in my favorite atomizer I'm running 24g SS twisted, it's beautiful. My secondary tank I run 26g twisted with a wider pitch and helixed with 32g twisted Kanthal, this cools it down even further, this is my build where I run 130-180w so that heat dissipation change really matters. With the twisted SS I don't notice ramp up time at all but with the precautions to heat dissipation I've made it prevents that burn at the end of the hit.

Anyways, yeah general rule of thumb could simply be "2 strands twisted will roughly equal 2 gauges lower than the strands you're twisting but with a higher ramp up time and lower heat dissipation" noting that the ramp up time increase isn't always noticeable, especially when concerning the faster heating wires (noticeable with Kanthal, but not SS for me so far).