Wire Size Chart Awg Mcm

By | August 11, 2023

AWG and MCM are two different ways of measuring the thickness of a wire. AWG stands for American Wire Gauge, while MCM stands for thousand circular mils. The two measurements are not directly comparable, but they can be converted into each other.

The AWG system is based on the number of draws it takes to reduce a copper rod to a given diameter. The smaller the number, the thicker the wire. The AWG scale starts at 0000, which is the thickest wire, and goes up to 40, which is the thinnest.

The MCM system is based on the cross-sectional area of the wire in thousand circular mils. One circular mil is equal to the area of a circle with a diameter of one mil (0.001 inch). The MCM scale starts at 1,000, which is the thickest wire, and goes up to 20,000, which is the thinnest.

The following table shows the conversion between AWG and MCM:

| AWG | MCM | |---|---| | 0000 | 46000 | | 000 | 40000 | | 00 | 36000 | | 0 | 32000 | | 1 | 28000 | | 2 | 24000 | | 3 | 20000 | | 4 | 16000 | | 5 | 12000 | | 6 | 8000 | | 7 | 6000 | | 8 | 4000 | | 9 | 2500 | | 10 | 1600 | | 11 | 1000 | | 12 | 600 | | 13 | 400 | | 14 | 250 | | 15 | 160 | | 16 | 100 | | 17 | 60 | | 18 | 40 | | 19 | 25 | | 20 | 16 |

When choosing a wire for a particular application, it is important to consider the current carrying capacity of the wire. The current carrying capacity of a wire is determined by its thickness. A thicker wire can carry more current than a thinner wire.

The following table shows the current carrying capacity of AWG wires:

| AWG | Current (Amps) | |---|---| | 0000 | 45 | | 000 | 40 | | 00 | 35 | | 0 | 30 | | 1 | 25 | | 2 | 20 | | 3 | 15 | | 4 | 12 | | 5 | 10 | | 6 | 8 | | 7 | 6 | | 8 | 4 | | 9 | 3 | | 10 | 2 | | 11 | 1.5 | | 12 | 1 | | 13 | 0.75 | | 14 | 0.5 | | 15 | 0.3 | | 16 | 0.2 | | 17 | 0.1 | | 18 | 0.05 | | 19 | 0.03 | | 20 | 0.02 |

It is important to note that the current carrying capacity of a wire is also affected by the ambient temperature. The higher the temperature, the lower the current carrying capacity of the wire.

When choosing a wire for a particular application, it is important to consider all of the factors involved, including the current carrying capacity, the thickness of the wire, and the ambient temperature. By doing so, you can ensure that you select the right wire for the job.


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