![]() Although it seems like a strange system, it is designed so that the wire area approximately doubles for every three steps on the gauge scale.įor AWG-metric conversions for the most common sizes of wire, see the chart below. What is the diameter of 500mcm wire Size: 500 MCM Number of Strands: 35 Insulation Thickness: 0.065 inches Outside Diameter: 0. ![]() There are also 39 gauge sizes in between. What is MCM in cable size circular mils MCM is an abbreviation for thousands of circular mils, an old measurement of wire gauge. In other international countries, conductors are measured using their cross-section, which is given in square millimeters.ĪWG: In the American Wire Gauge system, 36 AWG wire has a 0.0050-inch diameter. One MCM is equivalent to 1,000 circular mils.įor Britain and Canada, a system called the British Standard Wire Gauge (SWG) is the measurement system of choice. For larger wires, circular mils are used. MCM sizes, also called kcmils (kilo-circular mils), are for even larger cables. With the gauge system, the higher the number is, the smaller the cable will be. In the United States, smaller conductors are measured using the American Wire Gauge (AWG). When purchasing a wire or cable, it is important to understand the differences in sizes to ensure your application performs at its best.
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