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Product

Control & signal cableNR/PS/SIG/00005 Type B1/B2650/1100 V Trackside RailGP4 EPR + EM2 Heavy PCP

NR Type B1 / B2 Network Rail Type B1 / B2 Unarmoured MulticoreNetwork Rail NR/PS/SIG/00005 650/1100 V GP4 EPR / EM2 PCP unarmoured signalling cable

NR Type B1 (multicore) and Type B2 (single/twin) UK Network Rail trackside signalling cable (NR/PS/SIG/00005, 650/1100 V AC, -25 to +85 °C) with tinned copper cores (1.5–35 mm²), BS 7655 GP4 EPR insulation, and BS 7655 EM2 heavy-duty PCP sheath.

Approved

Oil-resistant

Flame-retardant

Outdoor & humid

Configuration

Order designation: NR Type B1 12×1.5
Outer Ø ≈: 18.80 mm
Wall thickness: 2.07 mm
Total weight ≈: 535.0 kg/km
Min. bend R (fixed): 113 mm

All sizes (13)

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Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum

NR specification: NR/PS/SIG/00005
Rated voltage: 650/1100 V AC
Conductor: Sn-Cu Cl. 5 / 2
Core insulation: BS 7655 GP4 EPR
Outer sheath: BS 7655 EM2 PCP
Service temp.: -25…+85 °C

Typical values for this cable type, based on Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2 — confirmed in the datasheet and quotation for your order.

Application fit

Is NR Type B1 / B2 right for your machine?

Select NR Type B1 (circular multicore) and NR Type B2 (single/twin tail) for surface concrete trough routes, trackside location cases, colour-light signals, and point-machine tail connections across UK Network Rail infrastructure.

Fixed installation

Suitable

Heavy-duty EM2 PCP outer sheath and flexible tinned copper cores lay cleanly in trackside concrete troughs and location cases.

Immersion & wet locations

Suitable

Thermoset GP4 EPR insulation and EM2 heavy-duty PCP sheath resist flooded trackside troughs, ballast dust, diesel/grease, and solar UV.

VFD inverter to AC motor screened feeder

With conditions

Type B1/B2 is unscreened and unarmoured; where 25 kV AC OLE screening and SWA protection are needed, specify NR Type E1 / E2.

Use NR Type E1 / E2 for screened SWA routes

Energy chain / drag chain

Not suitable

Designed for fixed trackside troughing and equipment tail terminations, not continuous drag chains.

Use JZ-50440 CP for drag-chain control

Typical machinesUK Network Rail Trackside TroughingWayside Location Cases & Relay RoomsColour-Light LED & Filament Signal FeedsClamp-Lock & HW Point Machine TailsTrack-Circuit Feed & Receiver Connections

Construction

Layer by layer

NR/PS/SIG/00005 Type B1 / B2 construction: tinned annealed copper conductors (1.5 mm² = 30/0.25 mm Class 5; 2.5–35 mm² = Class 2/5), BS 7655 GP4 EPR core insulation (white numbered cores), PET binder tape, and BS 7655 EM2 black PCP sheath.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Tinned copper conductors	Tinned annealed copper per BS EN 60228 (1.5 mm² uses 30/0.25 mm flexible stranding; 2.5–35 mm² stranded)Tin coating prevents sulphide/moisture corrosion and suits standard railway crimp lugs
2	Type GP4 EPR core insulation	85 °C ethylene-propylene rubber compound Type GP4 to BS 7655-1.2 (white with black printed numbers)High insulation resistance and 650/1100 V dielectric strength
3	Core binder tape	Non-hygroscopic synthetic binder tape over the laid-up cores (Type B1)Maintains circular core geometry and aids clean stripping at location cases
4	Type EM2 heavy-duty PCP sheath	Black polychloroprene elastomer compound Type EM2 to BS 7655-2.1Oil-resistant, flame-retardant (BS EN 60332-1-2), and weather-proof for trackside troughs

NR Type B1 Multicore (2–48 cores × 1.5 / 2.5 mm²)

Circular unarmoured multicore trackside signalling cable for inter-location trough runs

NR Type B2 Single & Twin Tail (1–2 cores × 1.5–35 mm²)

Single-core and flat/circular twin unarmoured tail cable for track circuits, point machines, and 650 V feeders

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 650/1100 V AC
AC dielectric test voltage: 3,500 V AC RMS for 5 minutes
Max. DC resistance (+20 °C): 12.8 Ω/km (1.5 mm² 30/0.25) · 7.56 Ω/km (2.5 mm²)
Insulation resistance: GP4 EPR per BS 7655-1.2

Thermal

Operating temperature range: -25 °C to +85 °C
Short-circuit conductor temp.: +250 °C (thermoset GP4 EPR)

Mechanical

1.5 mm² conductor stranding: 30/0.25 mm tinned copper (flexible)
Min. bending radius: 6 × overall cable diameter (fixed)
Core identification: White insulation with black numbers

Resistance

Oil & fuel resistance: BS 7655-2.1 Type EM2 PCP sheath
Flame retardance: BS EN 60332-1-2 self-extinguishing
Weather & UV resistance: Trackside trough & exposed tail rated

Reference standards

Network Rail standard: NR/PS/SIG/00005 (RT/E/PS/00005 / BR 895)
Material standards: BS 7655-1.2 (GP4) · BS 7655-2.1 (EM2)
RoHS & REACH: RoHS 3 & REACH compliant

Identification

Outer sheath colour: Black embossed/printed
Surface legend: ELECTRIC CABLE 650/1100V NR/PS/SIG/00005 B1/B2 [size] TEBAOFLEX
Customs tariff (HS): 8544.49

Sizes

13 standard configurations (NR Type B1 / B2)

Engineering dimensions, conductor stranding, mass and electrical ratings for NR Type B1 / B2 per Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2.

Dimensions & weights
Order designation	Cross-section / size	Conductor build	Wall ≈ mm	Outer Ø ≈ mm	Metal kg/km	Weight ≈ kg/km	Min. bend R fixed mm
Standard NR Type B1 / B2 configurations
NR Type B1 2×1.5	2 × 1.5	30/0.25	1.23	11.20	72.6	165.0	68
NR Type B1 4×1.5	4 × 1.5	30/0.25	1.41	12.80	101.2	230.0	77
NR Type B1 7×1.5	7 × 1.5	30/0.25	1.63	14.80	147.4	335.0	89
NR Type B1 10×1.5	10 × 1.5	30/0.25	2.00	18.20	211.2	480.0	110
NR Type B1 12×1.5	12 × 1.5	30/0.25	2.07	18.80	235.4	535.0	113
NR Type B1 19×1.5	19 × 1.5	30/0.25	2.40	21.80	334.4	760.0	131
NR Type B1 27×1.5	27 × 1.5	30/0.25	2.84	25.80	462.0	1,050.0	155
NR Type B1 37×1.5	37 × 1.5	30/0.25	3.17	28.80	607.2	1,380.0	173
NR Type B1 48×1.5	48 × 1.5	30/0.25	3.63	33.00	787.6	1,790.0	198
NR Type B2 2×2.5	2 × 2.5	7/0.67	1.36	12.40	92.4	210.0	75
NR Type B2 2×6.0	2 × 6.0	7/1.04	1.67	15.20	156.2	355.0	92
NR Type B2 2×10	2 × 10	7/1.35	1.94	17.60	224.4	510.0	106
NR Type B2 1×16	1 × 16	7/1.70	1.19	10.80	107.8	245.0	65

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Outer diameters and weights are nominal engineering values for NR Type B1 / B2 subject to standard manufacturing tolerances per Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2.

Electrical & rating data
Configuration	Max. DC R @ 20 °C Ω/km	Primary rating (A or nF/km)	Secondary rating	Dielectric test V AC rms
2 × 1.5	12.80	18.0	15.3	3,500
4 × 1.5	12.80	18.0	15.3	3,500
7 × 1.5	12.80	18.0	15.3	3,500
10 × 1.5	12.80	18.0	15.3	3,500
12 × 1.5	12.80	18.0	15.3	3,500
19 × 1.5	12.80	18.0	15.3	3,500
27 × 1.5	12.80	18.0	15.3	3,500
37 × 1.5	12.80	18.0	15.3	3,500
48 × 1.5	12.80	18.0	15.3	3,500
2 × 2.5	12.80	18.0	15.3	3,500
2 × 6.0	12.80	18.0	15.3	3,500
2 × 10	12.80	18.0	15.3	3,500
1 × 16	12.80	18.0	15.3	3,500

Electrical resistance at +20 °C and dielectric withstand voltages verified per Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2.

Quality & approvals

Testing & inspection

Routine tests on every production length, sample and type tests per batch — documented on an EN 10204 3.1 inspection certificate.

ConductorClass 5 stranding
Spark test100 % in-line
Lay-upCores, earth, fillers
SheathingInner, braid / screen, outer
Electrical testsAC voltage, resistance
DimensionsOD, wall thickness
Inspection documents & dispatchDrum & dispatch

Testing & inspection	Test value / reference	Frequency
Routine tests
Dielectric spark / high-voltage withstand test	100 % in-line spark and AC/DC dielectric withstand per Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2	Every manufactured length
Conductor DC resistance & continuity check	Within maximum 20 °C resistance limit specified for NR Type B1 / B2	Every spool or drum length
Sample tests
Insulation resistance & dimensional verification	Wall thickness, concentricity and insulation resistance per Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2	Per production batch
Environmental, mechanical & EMC qualification	Qualified to Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2 thermal, mechanical and environmental performance criteria	Type qualification

Inspection certificate

Issued with every drum, listing the routine test results for that length.

Product approvals

Network Rail NR/PS/SIG/00005 (formerly RT/E/PS/00005 & BR 895) Type B1 / B2CE (2014/35/EU) & RoHS 3 (2015/863/EU) CompliantREACH SVHC Compliance Verified

Company certificates

ISO 9001ISO 14001ISO 45001VDE marks approvalUL / cULCE · LVD / EMC

Marking & supply

Ordering & delivery

Sheath marking

ELECTRIC CABLE 650/1100V NR/PS/SIG/00005 B1 12C 1.5MM2 TEBAOFLEX

Delivery form: Export wooden drums, tactical reels or coils
Standard lengths: 100 m · 500 m · 1000 m (or custom cut lengths)
MOQ: 100 m (stock sizes) · 300–500 m (custom build)
Lead time: 2–4 weeks ex-works
Incoterms: EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFNR Type B1 / B2 Network Rail Type B1 / B2 Unarmoured Multicore – technical datasheet13 sizes · construction, technical data, approvals XLSXNR Type B1 / B2 spec data (Excel)All 13 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-20
Updated: 2026-10-20

FAQ

Questions engineers ask first

Not covered here? Send your drawing — an engineer replies within 2 business hours.

What is the difference between Network Rail Type B1 and Type B2 cables in NR/PS/SIG/00005?

Both are unarmoured 650/1100 V railway signalling cables with BS 7655 GP4 EPR core insulation and EM2 heavy-duty PCP outer sheathing. Type B1 covers circular multicore cables (2 to 48 cores, primarily 1.5 mm² 30/0.25 mm tinned copper) used for main inter-location signalling circuits, whereas Type B2 covers single-core and 2-core tail/feeder cables (1.5 mm² to 35 mm²) used for track-circuit leads, point machines, and 650 V signalling power.

Why does Network Rail specify 650/1100 V GP4 EPR insulation on 1.5 mm² signalling cores?

UK trackside signalling circuits operate up to 650 V AC and experience transient surges from traction return currents and relay switching. Thick-wall BS 7655-1.2 Type GP4 EPR insulation tested at 3,500 V AC for 5 minutes ensures long-term insulation integrity in damp trackside troughs.

Why are 1.5 mm² Type B1 conductors stranded as 30/0.25 mm tinned copper?

The 30/0.25 mm Class 5 flexible tinned copper stranding prevents wire fatigue from passing train vibration at trackside location cases and point machines while remaining compatible with standard Network Rail crimp terminals.

When should I specify NR Type E1 / E2 instead of Type B1 / B2?

Specify NR Type E1 / E2 when the cable route requires mechanical protection via galvanised steel wire armour (SWA) and/or copper screening against 25 kV 50 Hz AC overhead line equipment (OLE) interference.

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NR Type B1 / B2 Network Rail Type B1 / B2 Unarmoured Multicore

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