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Hook-up & equipment wiresLUL RSE/STD/024 Part 6BS 6853 Cat. 1a · S1085300/500 V & 0.6/1 kV

RSE STD 024 Part 6 RSE/STD/024 Rolling Stock Cable FamilyLondon Underground RSE/STD/024 Part 6 ultra-low-smoke deep-tube rolling stock cable

Q: What is London Underground RSE/STD/024 Part 6?

RSE/STD/024 Part 6 is the London Underground Limited (LUL) engineering standard specifying low-smoke zero-halogen single-core, multicore and screened rolling-stock cables for deep-tube and sub-surface passenger trains, aligned with LUL fire safety standard S1085 and BS 6853 Category 1a.

Q: Why are deep-tube underground train cable requirements so strict?

Deep-tube tunnels have minimal clearance between the train body and the tunnel wall, with passenger evacuation taking place through the train and along the track in restricted airflow. RSE/STD/024 Part 6 and BS 6853 Cat. 1a enforce ultra-low optical smoke absorbance (Ao) and weighted toxic gas emission (R < 1.0).

Q: How does RSE/STD/024 Part 6 relate to EN 50264 and EN 50306?

While RSE/STD/024 Part 6 originated as a dedicated London Underground specification prior to CENELEC harmonisation, modern production combines the exact dimensional and mechanical tables of EN 50264 / EN 50306 with full dual certification to LUL S1085 / BS 6853 Cat. 1a and EN 45545-2 HL3.

Q: Is RSE/STD/024 Part 6 suitable for fleet life-extension and signalling retrofits?

Yes. We supply both thin-wall signal/CBTC cables and reduced/standard-wall auxiliary power cables matching legacy LUL core identification and gland sizes.

Sub-surface and deep-tube railway rolling-stock wire and multicore cable family built to London Underground Limited `RSE/STD/024 Part 6` (`LUL S1085` / BS 6853 Category 1a / EN 45545-2 HL3) with Class 5 tinned copper conductors and cross-linked LSZH elastomer.

Flame-retardant

Oil-resistant

EMC screen

Approved

Cores × cross-section

Order designation: RSE/STD/024 4×1.5 Screened
Outer Ø min: 7.9 mm
Outer Ø max: 8.6 mm
Weight ≈: 142 kg/km
Min. bend R: 34 mm

Check against my drum All sizes (20)

Request a quote Datasheet WhatsApp

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

Voltage rating: 300 V & 0.6/1 kV
Fire standard: LUL S1085 Cat 1a
Conductor temp.: −40…+90/+105 °C
Smoke / toxicity: Ultra-low Ao
Bending radius: 4–6 × OD
Size range: 0.5–150 mm²

Typical values for this cable type, based on LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3 — confirmed in the datasheet and quotation for your order.

Application fit

Is RSE STD 024 Part 6 right for your machine?

Engineered for the confined single-bore deep-tube tunnels of the London Underground network, the `RSE/STD/024 Part 6` cable family meets the ultra-stringent smoke absorbance (`Ao`) and toxic fume (`R < 1.0`) limits of `BS 6853 Category 1a` and `LUL S1085` alongside `EN 45545-2 HL3`.

Fixed installation

Suitable

Deep-tube and sub-surface underground train car-body, traction auxiliary, door and signalling wiring.

VFD inverter to AC motor screened feeder

Suitable

Available with tinned-copper wire braid screen for EMC-protected underground train control and comms.

Trailing & towing

With conditions

Suitable for inter-car jumpers and bogie-to-body vibration; not for floor dragging.

Use EN 50264-2-2

Energy chain / drag chain

Not suitable

For mainland European TSI rolling stock without LUL-specific coding, select EN 50264-3-2 or EN 50306-4.

Use EN 50264-3-2

Typical machinesLondon Underground deep-tube & sub-surface fleetsUK rolling-stock refurbishment & life-extensionUnderground metro & tunnel maintenance vehiclesOnboard signalling, CBTC & driver cab retrofitsTraction auxiliary & battery distribution cubicles

Construction

Layer by layer

Shown: RSE/STD/024 Part 6 4×1.5 mm² Screened — Class 5 tinned annealed copper conductors, cross-linked low-smoke zero-halogen core insulation (numbered), halogen-free separator tape, tinned-copper braid screen and black LUL S1085 / BS 6853 Cat. 1a cross-linked LSZH outer sheath.

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Class 5 tinned copper conductor	Fine-stranded tinned annealed copper to BS EN 60228 Class 5 (or 19/37-strand on thin-wall signal types)BS EN 60228 · RSE/STD/024 Pt 6
2	Cross-linked LSZH core insulation	Electron-beam or thermoset cross-linked halogen-free polymer meeting BS 6853 Cat. 1a / EN 50264-1 / EN 50306-1RSE/STD/024 Pt 6 · BS 6853 Cat. 1a
3	Halogen-free tape (multicore types)	Low-smoke zero-halogen binder tape over cabled cores or twisted pairsRSE/STD/024 Pt 6
4	Optional tinned-copper braid screen	High-coverage tinned-copper wire braid screen on EMC control and multipair typesRSE/STD/024 Pt 6 · EN 50121-3-2
5	LUL S1085 cross-linked LSZH sheath	Oil-, fluid- and abrasion-resistant cross-linked halogen-free elastomer sheath with ultra-low smoke and toxicityLUL S1085 · BS 6853 Cat. 1a · HL3

RSE/STD/024 Part 6 Single-Core Equipment & Power (0.5–150 mm²)

300/500 V thin-wall and 0.6/1 kV reduced/standard-wall single-core rolling stock wires

RSE/STD/024 Part 6 Unscreened & Screened Multicore (2–37 cores)

300/500 V and 0.6/1 kV multicore control and auxiliary cables with optional tinned-Cu braid

RSE/STD/024 Part 6 Screened Multipair Signal (1P to 19P)

300 V thin-wall twisted-pair and individually screened pair cables for underground train comms

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage U0/U: 300/300 V (thin-wall signal), 300/500 V (control) & 0.6/1 kV (auxiliary power)
AC test voltage (50 Hz): 1.5 kV AC (300 V) · 2.0 kV AC (300/500 V) · 3.5 kV AC (0.6/1 kV)
Conductor resistance: To BS EN 60228 Class 5 tinned copper

Thermal

Operating temperature range: −40 °C to +90 °C (+105 °C on e-beam thin-wall types)
Short-circuit temperature: +200 °C max. (5 s)

Mechanical

Min. bending radius, fixed: 4 × OD (single-core & unscreened multicore) · 6 × OD (screened multicore)
Abrasion & notch resistance: Cross-linked sheath passes dynamic cut-through, scrape abrasion and fluid immersion tests

Resistance

London Underground fire safety: Complies with LUL RSE/STD/024 Part 6, LUL S1085 (Fire Safety Performance of Materials) & BS 6853 Category 1a
European fire harmonisation: Also meets EN 45545-2 Hazard Level HL3 (R15 & R16)
Smoke & toxic fume index: BS EN 61034-2 3m cube smoke test · BS 6853 Annex B toxicity index R < 1.0 · BS EN 60754-1/2 zero halogen

Reference standards

Primary standard: London Underground Railway Safety & Engineering Standard RSE/STD/024 Part 6
Associated UK / EU standards: LUL S1085, BS 6853 Category 1a, EN 50264, EN 50306 & EN 45545-2 HL3
RoHS & REACH: 2011/65/EU (RoHS 2), UKCA & EC 1907/2006 compliant

Identification

Sheath colour: Black (multicore) or colour/number coded (single-core)
Core identification: White cores with black numbers or black cores with white numbers + optional GN/YE earth
Sheath marking: TEBAOFLEX LUL RSE/STD/024 PART 6 [Size] BS 6853 CAT 1A EN 45545-2 HL3
Customs tariff (HS): 8544.49 (insulated conductors ≤ 1000 V)

Sizes

20 standard RSE STD 024 Part 6 configurations

Typical LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3 outer diameter limits, copper content and cable weight.

Dimensions & weights
Order designation	Cores × mm² / AWG	AWG ≈	Outer Ø min mm	Outer Ø max mm	Copper kg/km	Weight ≈ kg/km	Min. bend R mm
Single-Core Rolling Stock Wires (RSE/STD/024 Part 6, 0.75–70 mm²)
RSE/STD/024 1×0.75 (Single Core)	1×0.75	18	2.1	2.3	7	12	9
RSE/STD/024 1×1.5 (Single Core)	1×1.5	16	2.6	2.8	14	20	11
RSE/STD/024 1×2.5 (Single Core)	1×2.5	14	3.0	3.3	24	31	13
RSE/STD/024 1×6 (Single Core)	1×6	10	4.2	4.6	57	68	18
RSE/STD/024 1×16 (Single Core)	1×16	6	6.4	7.0	153	174	28
RSE/STD/024 1×35 (Single Core)	1×35	2	9.3	10.1	336	368	40
RSE/STD/024 1×70 (Single Core)	1×70	2/0	12.7	13.8	672	718	55
Unscreened Multicore Control & Power (RSE/STD/024 Part 6)
RSE/STD/024 2×1.0 Multicore	2×1.0	18	5.7	6.2	19	55	25
RSE/STD/024 4×1.0 Multicore	4×1.0	18	6.5	7.1	38	82	28
RSE/STD/024 7×1.0 Multicore	7×1.0	18	7.7	8.4	67	128	34
RSE/STD/024 12×1.0 Multicore	12×1.0	18	10.2	11.1	115	218	44
RSE/STD/024 4×1.5 Multicore	4×1.5	16	7.2	7.8	57	106	31
RSE/STD/024 7×1.5 Multicore	7×1.5	16	8.6	9.3	100	168	37
RSE/STD/024 4×2.5 Multicore	4×2.5	14	9.3	10.1	96	175	40
Tinned-Cu Braid Screened Multicore & Pairs (RSE/STD/024 Part 6)
RSE/STD/024 2×0.75 Screened	2×0.75	18	5.9	6.4	30	62	26
RSE/STD/024 4×1.0 Screened	4×1.0	18	7.3	7.9	58	112	32
RSE/STD/024 7×1.0 Screened	7×1.0	18	8.6	9.3	95	168	37
RSE/STD/024 4×1.5 Screened	4×1.5	16	7.9	8.6	82	142	34
RSE/STD/024 7×1.5 Screened	7×1.5	16	9.4	10.2	134	215	41
RSE/STD/024 12×1.5 Screened	12×1.5	16	12.3	13.4	224	355	54

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Dimensions and weights are typical values per LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3. Minimum fixed bending radius shown is 4 × OD.

Electrical & current ratings
Cross-section mm²	AWG ≈	Max. DC resistance 20 °C, Ω/km	Single wire in air 30 °C, A	Multi-core bundle 30 °C, A
0.75	18	26.7	13	10
1	18	20	16	12
1.5	16	13.7	21	16
2.5	14	8.21	30	22
6	10	3.39	53	38
16	6	1.24	100	71
35	2	0.565	169	117
70	2/0	0.277	270	185

Current ratings at 30 °C ambient in free air. Apply temperature and bundle grouping factors per applicable equipment standard.

Reel check

Will it fit your machine?

A first screen using datasheet values. Engineering confirms drum geometry, acceleration and tension with your quotation.

Cable sizeDrum core diameter (mm)

Cable length on drum (m)

Drum core 300 mm ≥ 68 mmBending radius OK (4 × OD 8.6 mm)

Minimum bending radius: 34 mm
Min. drum core diameter: ≈ 68 mm
Cable weight on drum: 7.1 kg
Copper content: 4.1 kg

Indicative only: based on the datasheet outer diameter and 4 × OD bending radius. Current derating for wound layers per DIN VDE 0298-4 is assessed separately.

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
AC dielectric voltage test	2.0 kV AC (50/60 Hz)	Every manufactured length
Conductor DC resistance	IEC 60228 / ASTM (tinned copper)	Every manufactured length
Sample tests
Flame propagation test	IEC 60332-1-2 / UL VW-1 / ISO 6722-1	Per production batch
Insulation & sheath material physical properties	LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3	Type approval

Inspection certificate

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

Product approvals

LUL RSE/STD/024 Part 6 · BS 6853 Cat. 1a / EN 45545-2 HL3CE · RoHS 2 (2011/65/EU) · REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX LUL RSE/STD/024 PART 6 [Size] BS 6853 CAT 1A HL3

Delivery form: Export wooden drums, reels or coils, cut-to-length on request
Packaging: Heat-treated ISPM-15 timber drums or spools with sealed ends
Conductor / colour options: Custom core counts, stripe combinations or cut harnesses on request

Technical documents

Downloads

PDFRSE STD 024 Part 6 RSE/STD/024 Rolling Stock Cable Family – technical datasheet20 sizes · construction, technical data, approvals XLSXRSE STD 024 Part 6 spec data (Excel)All 20 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 London Underground RSE/STD/024 Part 6?

RSE/STD/024 Part 6 is the London Underground Limited (LUL) engineering standard specifying low-smoke zero-halogen single-core, multicore and screened rolling-stock cables for deep-tube and sub-surface passenger trains, aligned with LUL fire safety standard S1085 and BS 6853 Category 1a.

Why are deep-tube underground train cable requirements so strict?

Deep-tube tunnels have minimal clearance between the train body and the tunnel wall, with passenger evacuation taking place through the train and along the track in restricted airflow. RSE/STD/024 Part 6 and BS 6853 Cat. 1a enforce ultra-low optical smoke absorbance (Ao) and weighted toxic gas emission (R < 1.0).

How does RSE/STD/024 Part 6 relate to EN 50264 and EN 50306?

While RSE/STD/024 Part 6 originated as a dedicated London Underground specification prior to CENELEC harmonisation, modern production combines the exact dimensional and mechanical tables of EN 50264 / EN 50306 with full dual certification to LUL S1085 / BS 6853 Cat. 1a and EN 45545-2 HL3.

Is RSE/STD/024 Part 6 suitable for fleet life-extension and signalling retrofits?

Yes. We supply both thin-wall signal/CBTC cables and reduced/standard-wall auxiliary power cables matching legacy LUL core identification and gland sizes.

Request a quote

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03Message for our engineers

RSE STD 024 Part 6 RSE/STD/024 Rolling Stock Cable Family

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