Checking wire gauge?

[pmcode]

Got some mystery wire with one of my rda's, and have no idea what gauge it is. Can I use a digital caliper to see what gauge it is? Or is there a "standard" ohm per inch for each gauge?

Thanks guys.

 

[Vwls]

This chart is for A1 type of Kanthal wire per inch (other grades are different):

30 awg (Ω/in) 0.7 ohms
31 awg (Ω/in) 0.9 ohms
32 awg (Ω/in) 1.2 ohms
33 awg (Ω/in) 1.4 ohms
34 awg (Ω/in) 1.8 ohms
35 awg (Ω/in) 2.3 ohms
36 awg (Ω/in) 2.9 ohms

 

[Vwls]

Hmmm - this one is better:

Kanthal Grade -------- A-1 -------- A ---------- D ----- Nichrome60 --- Nichrome80 -- Dia.in --- Dia.mm
28 awg (ohm/in) --- 0.4563 --- 0.4360 --- 0.4250 --- 0.3520 ---28--- 0.3390 ------ 0.0126 -- 0.3211 -- 28
29 awg (ohm/in) --- 0.5754 --- 0.5497 --- 0.5359 --- 0.4439 ---29--- 0.4274 ------ 0.0113 -- 0.2859 -- 29
30 awg (ohm/in) --- 0.7255 --- 0.6932 --- 0.6758 --- 0.5597 ---30--- 0.5390 ------ 0.0100 -- 0.2546 -- 30
31 awg (ohm/in) --- 0.9149 --- 0.8741 --- 0.8522 --- 0.7058 ---31--- 0.6796 ------ 0.0089 -- 0.2268 -- 31
32 awg (ohm/in) --- 1.1537 --- 1.1022 --- 1.0745 --- 0.8900 ---32--- 0.8570 ------ 0.0080 -- 0.2019 -- 32
33 awg (ohm/in) --- 1.4547 --- 1.3899 --- 1.3550 --- 1.1222 ---33--- 1.0807 ------ 0.0071 -- 0.1798 -- 33
34 awg (ohm/in) --- 1.8344 --- 1.7526 --- 1.7086 --- 1.4151 ---34--- 1.3627 ------ 0.0063 -- 0.1601 -- 34
35 awg (ohm/in) --- 2.3131 --- 2.2100 --- 2.1545 --- 1.7844 ---35--- 1.7183 ------ 0.0056 -- 0.1426 -- 35
36 awg (ohm/in) --- 2.9168 --- 2.7868 --- 2.7168 --- 2.2501 ---36--- 2.1668 ------ 0.0050 -- 0.1270 -- 36
37 awg (ohm/in) --- 3.6780 --- 3.5141 --- 3.4258 --- 2.8373 ---37--- 2.7323 ------ 0.0045 -- 0.1131 -- 37
38 awg (ohm/in) --- 4.6379 --- 4.4312 --- 4.3199 --- 3.5778 ---38--- 3.4453 ------ 0.0040 -- 0.1007 -- 38

 

[DKP#]

Hmmm - this one is better:

Kanthal Grade -------- A-1 -------- A ---------- D ----- Nichrome60 --- Nichrome80 -- Dia.in --- Dia.mm
28 awg (ohm/in) --- 0.4563 --- 0.4360 --- 0.4250 --- 0.3520 ---28--- 0.3390 ------ 0.0126 -- 0.3211 -- 28
29 awg (ohm/in) --- 0.5754 --- 0.5497 --- 0.5359 --- 0.4439 ---29--- 0.4274 ------ 0.0113 -- 0.2859 -- 29
30 awg (ohm/in) --- 0.7255 --- 0.6932 --- 0.6758 --- 0.5597 ---30--- 0.5390 ------ 0.0100 -- 0.2546 -- 30
31 awg (ohm/in) --- 0.9149 --- 0.8741 --- 0.8522 --- 0.7058 ---31--- 0.6796 ------ 0.0089 -- 0.2268 -- 31
32 awg (ohm/in) --- 1.1537 --- 1.1022 --- 1.0745 --- 0.8900 ---32--- 0.8570 ------ 0.0080 -- 0.2019 -- 32
33 awg (ohm/in) --- 1.4547 --- 1.3899 --- 1.3550 --- 1.1222 ---33--- 1.0807 ------ 0.0071 -- 0.1798 -- 33
34 awg (ohm/in) --- 1.8344 --- 1.7526 --- 1.7086 --- 1.4151 ---34--- 1.3627 ------ 0.0063 -- 0.1601 -- 34
35 awg (ohm/in) --- 2.3131 --- 2.2100 --- 2.1545 --- 1.7844 ---35--- 1.7183 ------ 0.0056 -- 0.1426 -- 35
36 awg (ohm/in) --- 2.9168 --- 2.7868 --- 2.7168 --- 2.2501 ---36--- 2.1668 ------ 0.0050 -- 0.1270 -- 36
37 awg (ohm/in) --- 3.6780 --- 3.5141 --- 3.4258 --- 2.8373 ---37--- 2.7323 ------ 0.0045 -- 0.1131 -- 37
38 awg (ohm/in) --- 4.6379 --- 4.4312 --- 4.3199 --- 3.5778 ---38--- 3.4453 ------ 0.0040 -- 0.1007 -- 38

phew saved



here's a simple one with diameters

Kanthal A-1 Wire Specs: (Ohms Per Inch)

•28 AWG- 0.439 Ohms/in, 0.0508 Diameter (in.)

•30 AWG- 0.696 Ohms/in, 0.0100 Diameter (in.)

•32 AWG- 1.091 Ohms/in, 0.0080 Diameter (in.)

•33 AWG- 1.383 Ohms/in, 0.0071 Diameter (in.)

•34 AWG- 1.758 Ohms/in, 0.0063 Diameter (in.)

 

[riseabovethestorm]

Voltage Drop / Maximum Current = Wire Ohms per total length of cable(example: 0.1Vdc/100A = 0.001 Ohm)

Sauce: how-to-determine-wire-gauge | Power Test Instruments & Systems Power Test Instruments & Systems

Attached an image from that page. My suggestion: Save it to your smartphone. That way, you'll always have it with you!

 

[SissySpike]

28 is easy its pretty thick and not so bendy. 34 is hard to see super thin. Also it could possibly be NR wire Ive grabbed that spool buy mistake and made a coil it dose not work very well;-)

Voltage Drop / Maximum Current = Wire Ohms per total length of cable(example: 0.1Vdc/100A = 0.001 Ohm)

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