One Thousand Circular Mils Or $1 \mathrm{kcmil}$ Is Sometimes Designated by the Abbreviation MCM

Essay

One thousand circular mils or $1 \mathrm{kcmil}$ is sometimes designated by the abbreviation MCM. Data for commercial bare aluminum electrical conductors lists a $60-\mathrm{Hz}$ resistance of $0.0740 \mathrm{ohm}$ per kilometer at $75^{\circ} \mathrm{C}$ for a 954-MCM AAC conductor. (a) Determine the cross-sectional conducting area of this conductor in square meters. (b) Find the $60-\mathrm{Hz}$ resistance of this conductor in ohms per kilometer at $45^{\circ} \mathrm{C}$ .