Signalling & Control Cable to UK NETWORK RAIL Standard
Generally speaking, this type of internal and external single and multicore Signalling cable is used for the control of the UK rail signal network. The applicable standard is NR/PS/SIG/00005. These signalling cables are insulated with either LSZH or EPR compound and sheathed by either elastomeric LSZH or PCP sheath compound to make the cables become highly fl exible for railtrack installation. Further, the cables are also oil resistant.
Caledonian's signalling cable types include Class 2 stranded A1, A2 and A3 with LSZH insulation; Class 2 stranded B1 and B2 with EPR insulation and HDPCP sheath; Class 5 stranded C1 and C2 with EPR insulation and high density PCP sheath; Class 2 stranded D1 and D2 with EPR or LSZH Insulation and LSZH sheath. Class 5 stranded E1 and E2 with EPR or LSZH insulation and LSZH sheath; and Class 5 stranded C3 with EPR insulation and E3 with LSZH insulation are protected with overall screening.
Signalling cable type A1, A2, A3
LSZH cables for free wiring in relay rooms, signal boxes, REBs (Equipment Boxes) and location cases. All Type A Cables have Class 2 stranded tinned copper conductors with LSZH insulation. A1 and A2 Cables are single core cables and A3 Cables are multi-core. A1 Cables are with LSZH insulation only and A2 and A3 Cables also have an LSZH sheath.
Signalling cable type B1, B2, D1 & D2
Type B and D Signalling Cables are used between Equipment Boxes, Signal Boxes, Relay Rooms and Location Case. Both B and D Cables have Class 2 stranded tinned copper conductors – B1 and D1 Cables are single core cables and B2 and D2 Cables are twin and multi-core cables. Whereas B1 and B2 Cables have EPR insulation and HDPCP sheathing, D1 and D2 Cables have LSZH or EPR insulation and LSZH sheathing.
Signalling cable type C1, C2, E1 & E2
Type C and E Signalling Cables are designed to carry control and signal information between the Location Cases and the Signalling Head. Both C and E Cables have Class 5 stranded tinned copper conductors – C1 and E1 Cables are single core cables and C2 and E2 Cables are twin and multi-core cables. Whereas C1 and C2 Cables have EPR insulation and HDPCP sheathing, E1 and E2 Cables have LSZH or EPR insulation and LSZH sheathing. C2 and E2 Cables are commonly referred to as Tail Cables. C1 and E1 Cables are used for the maintenance of these installations.
Signalling cable type C3 & E3
Type C3 & E3 cables are designed for use in the rail network's TPWS (train protection warning system). These cables have two fl exible cores with either EPR (C3 Cable) or LSZH (E3 Cable) insulation, a drain wire, and an aluminium screen.