French locomotive classification
Under the French classification system for locomotive wheel arrangements, the system is slightly different for steam and electric/diesel vehicles. Steam. The French system counts axles, rather than wheels. As with Whyte notation, a conventional rigid locomotive will have three digits corresponding to its axle configuration: The first digit is the number of leading unpowered axles; the second digit the number of powered axles; The third digit the number of trailing unpowered axles. Examples. 0-6-0 = 030 2-6-0 = 130 0-6-2 = 031 4-6-2 = 231 2-8-0  = 140 4-8-0 = 240 4-6-4 = 232 4-8-4 = 242 2-6-6-2 = 130+031 Electric and diesel. With electric and diesel vehicles include DMUs a letter A-B-C-D replaces 1-2-3-4 for the number of powered axles, and each bogie is grouped separately. 0-4-0+0-4-0 = B-B (if axles connected by rods or other means) 0-6-0+0-6-0 = Co-Co (if axles driven independently)