Is Mcm The Same As Kcmil

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MCM is definitely an abbreviation for a large number of circular mils, a classic measurement of wire gauge. 1 MCM = 1 kcmil = .5067 square milimeters. A mil is 1/1000 inch. MCM is usually employed for large-diameter wire.

Measurements. 1000 circular mils or kcmil, the wire gauge is equivalent mix sectional area (500 MCM = 500,000 circular mils ) Million cubic metre, the system of volume.

Glossary Term: kcmil

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. A wire 200 mils in diameter is 40 MCM.

kcmil Wire Size Chart (Copper Wire)

kcmil or MCM Wire: mm2 (Diameter): Ampacity At 60°C (140°F): Ampacity At 75°C (167°F): Ampacity At 90°C (194°F):
250 kcmil (250 MCM) 126.7 mm2 215 Amps 255 Amps 290 Amps
300 kcmil (300 MCM) 152.0 mm2 240 Amps 285 Amps 320 Amps
350 kcmil (350 MCM) 177.3 mm2 260 Amps 310 Amps 350 Amps
400 kcmil (400 MCM) 202.7 mm2 280 Amps 335 Amps 380 Amps
500 kcmil (500 MCM) 253.4 mm2 320 Amps 380 Amps 430 Amps
600 kcmil (600 MCM) 304.0 mm2 355 Amps 420 Amps 475 Amps
700 kcmil (700 MCM) 354.7 mm2 385 Amps 460 Amps 520 Amps
750 kcmil (750 MCM) 380.0 mm2 400 Amps 475 Amps 535 Amps
800 kcmil (800 MCM) 405.4 mm2 410 Amps 490 Amps 555 Amps
900 kcmil (900 MCM) 456.0 mm2 435 Amps 520 Amps 585 Amps
1000 kcmil (1000 MCM) 506.7 mm2 455 Amps 545 Amps 615 Amps
1250 kcmil (1250 MCM) 633.4 mm2 495 Amps 590 Amps 665 Amps
1500 kcmil (1500 MCM) 760.1 mm2 520 Amps 625 Amps 705 Amps
1750 kcmil (1750 MCM) 886.7 mm2 545 Amps 650 Amps 735 Amps
2000 kcmil (2000 MCM) 1013.4 mm2 560 Amps 665 Amps 750 Amps

‘Which temperature should I look for ampacity?’ This is one of the most common questions from people who see this kcmil copper wire size chart.

Basically, it depends on which type of wire you have. You should look at:

  • 60°C ampacity for these types of wires: TW, UF.
  • 75°C ampacity for these types of wires: RHW, THHW, THW, THWN, XHHW, USE, ZW.
  • 90°C ampacity for these types of wires: TBS, SA, SIS, FEP, FEPB, MI, RHH, RHW-2, THHN, THHW, THW-2, THWN-2, USE-2, XHH, XHHW, XHHW-2, ZW-2.

    • The same goes for the MCM aluminum wires. You can find the ampacity chart for kcmil aluminum wires here:

    What is 500 mcm cable used for?

    500 MCM / 500 KCMIL 600 -volt Copper THHN THWN-2 can be used like a building wire for industrial and commercial applications.

    AWG To kcmil Calculator (2nd AWG To MCM Calculator)

    This is the 2nd calculator. Just insert the AWG wire size and the calculator will automatically determine what kcmil number (or MCM number) would such an AWG wire has:

    For an even easier way to find kcmil and AWG wire numbers, you can use these two charts:

    FAQ

    Is 250 mcm the same as 250 kcmil?

    250 MCM wire can also be denoted as 250 kcmil wire; these are exactly the same wires.

    What is kcmil wire?

    KCMil – A method of measuring conductor size that stands for thousand circular mils. K represents kilo for 1,000. C represents circular, and mil, M, is 1/1000 of an inch. A wire that is one mil in diameter has an area of one circular mil or 1 KCMil. KCMil replaced MCM for sizing conductors.

    What size is kcmil?

    kcmil—In the North American electrical industry, conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1 kcmil = 0.5067 mm². A circular mil is the area of a wire one mil in diameter.

    What size wire is 400 kcmil?

    kcmil—In the North American electrical industry, conductors larger than 4/0 AWG are generally identified by the area in thousands of circular mils (kcmil), where 1 kcmil = 0.5067 mm². A circular mil is the area of a wire one mil in diameter.