Cir Mils or CMA = Circular Mil Area which is equal to 1/1000 (0.001) of an inch in diameter or 0.000507 MM.
How do you calculate CMA on a wire?
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- Wire Sizes.
- HOW TO COMPUTE CIRCULAR MIL AREA OF (CMA) OF VARIOUS SHAPES OF WIRE. Round Solid Wire AWG.
- x.
- D x D = CMA.
- Dia. Dia.
- Multiply the diameter in Mils by itself. CMA = D2. Multiply the diameter of one strand (in mils) by itself, and then multiply the result by the total number of strands.
- WIRE SIZES.
- D. D.
What is the CMA of 12 AWG wire?
AWG, diameter mil, circular mil, diameter in mm and area in mm 2
| American Wire Gauge (AWG) | Diameter (mils) (10-3 in) | Area (circular mils) (CM) (mil2) |
|---|---|---|
| 11 | 90.7 | 8234 |
| 12 | 80.8 | 6530 |
| 13 | 72.0 | 5178 |
| 14 | 64.1 | 4107 |
How do you find the circular mil area of a wire?
Multiply the width of the wire cross Multiply the width of the wire section in mils by the thickness of cross section in millimeters by the wire cross section in mils by the thickness in millimeters by 1.2732 and subtract the radius 1973.525 and subtract the radius factor included below.
What is CMA of conductor?
ALWAYS SELECT TERMINALS BY THE CIRCULAR MIL AREA METHOD. For example, a wire size 18 AWG 16-strand conductor (1600 CMA) and a wire size 16 AWG 19-strand conductor (2426 CMA) will have a combined total of 4026 CMA. This total CMA is equivalent to a wire size 14 AWG conductor.
What size wires are stranded?
Smaller electrical wire sizes are generally made of solid conductors while wires larger than Number 6 AWG are generally stranded.
How do you convert mils to circular mils?
Mils to circular mils formula To calculate circular mils, c, from mils, use the formula, c= d² where d is the diameter of the wire in mils. For example, if the diameter of a conductor is 3 mils, then the circular mils equivalent is 3 x 3 = 9 circular mils (cmil).
What is MCM measurement?
MCM is an abbreviation for thousands of circular mils, an old measurement of wire gauge. 1 MCM = 1 kcmil = 0.5067 square milimeters. A mil is 1/1000 inch. Most wire uses AWG. MCM is also used for “million cubic meters.”
