Locomotive numbering system (from Wiki)
Steam Locomotive: Number of Driving axles-Class-Running number
Electric Locomotive: E(lectric)-Number of Driving axles-Class-Running number
Diesel Locomotives: D(iesel)-Number of Driving axles-Class-Running number
Electric: All classes of electric locomotives begin with the letter "E" for "electric"
Diesel: All classes of diesel locomotives begin with the letter "D" for "Diesel".
Number of driving axles (Unpowered axles such as leading and trailing axles or axles of tenders are disregarded)
- 2 axles – B
- 3 axles – C
- 4 axles – D
- 5 axles – E
- 6 axles – F
- 7 axles – G
- 8 axles – H
etc
Steam Locomotive Classes
- 10–49 – Tank locomotives
- 50–99 – Tender locomotives
Example: D51 498
Electric Locomotive Classes
- 10–39 - Locomotives with maximum speed 85 km/h or less
- 40–49 - Locomotives for rack railway
- 50–99 - Locomotives with maximum speed exceeding 85 km/h
Example: EH50 031
Diesel Locomotive Classes
- 10–49 - Locomotives with maximum speed 85 km/h or less
- 50–99 - Locomotives with maximum speed exceeding 85 km/h
Example: DD13 001