Descriptor, Meaning
- AR, Abandoned route
- C, Copper communications cable
- CA, Compressed air
- CCTV, Closed circuit television
- CUL, Culvert
- DC, 1500 V dc system cable
- EB, Electrolysis bond cable
- HV, High voltage – Voltages greater than 1000 V ac or 1500 V dc
- LV, Low voltage power -Voltages less than or equal to 1000 V ac or 1500 V dc
- OF, Optic fibre cable
- S, Signal cable
- SD, Station data (Smartcard and miscellaneous data cabling)
- S&C, Signal cable and copper communications cable
- TD, Track drainage
- USM, Un-coded service mix