What Is the Difference Between MCM and Kcmil?


Quick Answer

Both MCM and kcmil mean 1,000 circular mils, which is a unit used to measure the area of the circular cross section of a wire. The terms MCM and kcmil are used interchangeably by the National Electric Code to describe wires that are larger than 0000 American wire gauge.

Continue Reading
Related Videos

Full Answer

One mil is equal to 1/1000 of an inch, and one circular mil is the area of a circle that has a diameter of one mil. The reason MCM and kcmil both mean 1,000 circular mils, is that the letter M in roman numerals is equal to 1,000, so MCM is 1000CM, or 1,000 circular mils. Similarly, the prefix kilo means 1,000, so kcmil is equal to 1000cmil, or 1,000 circular mils.

Learn more about Electrical

Related Questions