Is there a chart for wire gauge lengths to ohms?

[subver]

So I have a multimeter but I cannot get a good reading without wrapping wire around the probes really tight.. so I'm basically wondering if there is a chart anywhere that says what the ohm rating is of different wire gauge lengths? Or even just an inch/cm/etc?

I'm sure even the same gauge wires are even slightly different but there's gotta be a good estimate right?

(what length of 32awg wire gives 1ohm, and 34awg? etc)

Thanks guys!

 

[justinred]

http://www.e-cigarette-forum.com/forum/rebuildable-atomizer-systems/320042-resistance-wire-kanthal-nichrome.html

 

[subver]

Perfect! Thank you

 

[Bishopheals]

use rubber gloves that way your body current don't affect the ohms reading.

 

[subver]

Good call... I've tried not touching the wires, and I've also tried using those alligator clips (and tried those little hook probes).. for some reason it still jumps around. I have the Klein MM200... I'm thinking maybe I need smaller alligator clips, the ones I have are pretty big..
It really only has worked if I wrap the wire around the straight probes, and I was getting OK readings when I had the hook probes if I pushed it closed really tight... but still not perfect! I'm almost positive the multimeter has the capabilities to read low ohms so it's gotta be the connections.
To be honest I just fogottaboudiiiiit

 

[dspin]

Posted Zoranth


32 Gage Nichrome is 10.6 ohms per foot
34 Gage Nichrome is 17 Ohms per foot

so, for 32 ga, 10.6 ohms/12 = 0.8833 ohms per inch. in order to make a coil that is 1.5 ohms you need a R wire that is 1.69 inches long.

for 34 ga, 17 ohms/12 = 1.4166 ohms per inch. In order to make a coil that is 1.5 ohms you need a R wire that is 1.06 inches long.

Now, that is the length of the R wire that is between the 2x NR wires.

 

[Bishopheals]

Good call... I've tried not touching the wires, and I've also tried using those alligator clips (and tried those little hook probes).. for some reason it still jumps around. I have the Klein MM200... I'm thinking maybe I need smaller alligator clips, the ones I have are pretty big..
It really only has worked if I wrap the wire around the straight probes, and I was getting OK readings when I had the hook probes if I pushed it closed really tight... but still not perfect! I'm almost positive the multimeter has the capabilities to read low ohms so it's gotta be the connections.
To be honest I just fogottaboudiiiiit

I think something wrong with the meter. may need to switch it

 

[subver]

It's too late for a refund but I wonder if Home Depot will exchange it for me.
It seems to work good if I'm testing an Ithaka or Ody itself, though.. stick one probe in the center post and the other on the base... very strange that it doesn't work well with wires! I watched your videos and yours definitely works better than mine with a simple alligator clip.

 

[Ariel_MX]

It's too late for a refund but I wonder if Home Depot will exchange it for me.
It seems to work good if I'm testing an Ithaka or Ody itself, though.. stick one probe in the center post and the other on the base... very strange that it doesn't work well with wires! I watched your videos and yours definitely works better than mine with a simple alligator clip.

¿Have you tried changing the battery?

I have a cheap multimeter, since new it never worked fine, internal resistance was too high (+1.8 ohms), it stayed jumping between values when measuring resistances, and all sort of problems.

First thing I did was disassemble it and cleaned the contacts on the wheel, it worked much better: constant internal resistance reading (1.0 ohms). Last week it started to jump between values again, I just changed the battery for a new one and it is working very good, now it shows 0.4 ohms of internal resistance.

I do not think that touching the wires while reading resistance will affect, I always do like that, holding one the resistance wires between my fingers and multimeter pins and get the same reading that I get when not touching them with fingers (to my understanding, electricity travels through the easiest path, but I could be wrong).