Canadian National Steam Locomotive Classifications

Classification Symbol	Wheel Arrangement	Driving Wheel Diameter	Originally Assigned Number Series
A	4-4-0	63" or less	100 - 199
B	4-4-0	over 63"	200 - 399
C	2-6-0	52" or less	400 - 469
D	2-6-0	52" to 58"	470 - 529
E	2-6-0	over 58"	530 - 999
F	4-6-0	52" or less	1000 - 1015
G	4-6-0	52" to 58"	1016 - 1199
H	4-6-0	58" to 63"	1200 - 1499
I	4-6-0	over 63"	1500-1799
J	4-6-2	70" or less	5000-5499
K	4-6-2	over 70"	5500 - 5999
K	4-6-4	all	5700-5999 (8/30)
L	2-8-0	52" or less	1800 - 1804
M	2-8-0	52" to 58"	1805 - 2200
N	2-8-0	over 58"	2201 - 2999
O	0-6-0	all	7000 - 7999
P	0-8-0	all	8000 -8499
Q	Oil-electric switchers		7700 - 7999 (5/30)
R	2-8-2	58" or less	3000 - 3199
S	2-8-2	over 58"	3299 - 3999
T	2-10-2	all	4000 -4999
U	4-8-2	all	6000 - 6999
U	4-8-4	all	6100 - 6999 (5/27)
V	Oil-electric road locomotives		9000 - 9099 (10/28)
W	0-10-0	all	8500-8599
X	Miscellaneous	all	1 - 99
Z	Straight electric locomotives		9000 -9999