Answer for USA, Canada and countries running a 60 Hz supply service.
500 mcm wire is a stranded wire with the equivalent of 500,000 circular mils in cross-sectional area.
A circular mil is a circle with a diameter of 1 mil, or 1/1000th of an inch.
500 kcmil means the same thing.
In common practice this size conductor is capable of handling 400 amps.
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m = 1000 c = 100 d = 500 MCMD doesn't make sense MCM = 1900 MD = 1500 CM = 900 so it would be MCM + D = 1900 + 500 = 2400, but that would be written MMCD
what is mcm corce
MCM is 1900
MCM
MCM = 1900