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Product

MIL-DTL-24643 EMP-shielded watertight multi-pair submarine cableMIL-DTL-24643/56 & /57600 V / 300 V 115 ΩEMP Double Cu Braid

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Submarine CableMIL-DTL-24643/56 & /57 · 600 V · Mil-dtl-24643 emp-shielded watertight multi-pair

MIL-DTL-24643/56 & /57 Types LS2SWL-7, LS2UW-42 & LS2UWS-42 Watertight Shielded Multi-Pair Shipboard & Submarine Communication/Control Cable (MIL-DTL-24643/56 & /57, 600 V, -30 °C to +105 °C, min. bend radius 8 × OD).

Water-resistant

EMC screen

Low-EMC design

Flame-retardant

Configuration

Order designation: MIL-DTL-24643 Config A (Compact)
Outer Ø ≈: 10.4 mm
Net weight ≈: 155 kg/km
Tensile rating ≈: 4.5 kN
Core / stranding: Stranded tinned Cu (IEC 60228 / ASTM)

All sizes (3)

Request a quote Datasheet WhatsApp info@tebaoflex.com

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

Rated voltage: 600 V
Operating temp.: −30…+105 °C
Min. bend radius: 8 × OD
Core / conductor: 7×2×16
Outer protection: LSZH
Standard: MIL-DTL-24643/56

Typical values for this cable type, based on MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard — confirmed in the datasheet and quotation for your order.

Application fit

Is MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) right for your machine?

Immersion & wet locations

Suitable

Longitudinally and radially water-blocked construction resists hydrostatic pressure and marine immersion.

Offshore platform & shipboard deck trays

Suitable

Marine-grade jacket resists oil, seawater, UV weathering and mechanical impact on vessels and offshore structures.

Fixed installation

Suitable

Approved for fixed shipboard, submarine outboard, nuclear pool and seabed feeder routing.

Motor stator, traction & converter leads

Suitable

Flexible stranded copper conductors terminate cleanly into submersible pumps, anodes, thrusters and switchgear.

Festoon & line chain

Not suitable

Outboard marine and feeder construction is not designed for high-speed crane festoon trolleys.

Use (N)3GRDC5G-J/O Festoon Cable

Typical machinesMarine & Offshore CableNaval Shipboard & Submarine OutboardOffshore Cathodic Protection (ICCP)Underwater Welding & Nuclear PoolsDeep-Well & Seabed Pump Feeders

Construction

Layer by layer

Shown: MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) (MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard) featuring watertight pairs (7×2×16 awg / 42×2×26 awg), individual pair braid & tapes (ls2swl-7) and cross-linked polyolefin jacket (xlpo) (5-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Watertight Pairs (7×2×16 AWG / 42×2×26 AWG)	Longitudinally water-blocked tinned copper conductors with XLPE insulation
2	Individual Pair Braid & Tapes (LS2SWL-7)	Tin-coated copper braid shield + two sealed polyester tapes over each 16 AWG pair
3	Watertight Core & Separator Tape	Water-Blocking / watertight fillers preventing inter-compartment flooding
4	Double Overall Tin-Coated Copper Braid	Dual overall copper braid shields meeting MIL-DTL-24643 EMP & Zt limits
5	Cross-Linked Polyolefin Jacket (XLPO)	1.65–1.91 mm black low-smoke zero-halogen XLPO outer sheath (optional Al armor)

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) — Standard Subsea & Marine Execution

Built to MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard with watertight pairs (7×2×16 awg / 42×2×26 awg) and cross-linked polyolefin jacket (xlpo)

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) — Custom Drum Length & Termination Kit

Available in custom continuous subsea/wellbore drum lengths or pre-terminated assemblies

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) — Routine & Hydrostatic Test Certified

Supplied with EN 10204 3.1 routine dielectric, resistance & pressure/dimensional report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 600 V (MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard)
Core / conductor construction: Watertight Pairs (7×2×16 AWG / 42×2×26 AWG) — Longitudinally water-blocked tinned copper conductors with XLPE insulation
Primary dielectric / buffering: Individual Pair Braid & Tapes (LS2SWL-7) — Tin-coated copper braid shield + two sealed polyester tapes over each 16 AWG pair

Thermal

Continuous operating temperature: −30…+105 °C (subsea, marine & submersible duty)
Short-circuit / peak thermal rating: Verified thermal stability per MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: Cross-Linked Polyolefin Jacket (XLPO) — 1.65–1.91 mm black low-smoke zero-halogen XLPO outer sheath (optional Al armor)
Minimum bending radius: 8 × OD
Hydrostatic, tensile & crush duty: Double Overall Tin-Coated Copper Braid — Dual overall copper braid shields meeting MIL-DTL-24643 EMP & Zt limits

Resistance

Hydrostatic pressure & water blocking: Engineered for continuous submersion and hydrostatic integrity per MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard
Seawater, oil & chemical resistance: Resistant to seawater hydrolysis, hydraulic oils and abrasion per MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard
Environmental & test standards: IEC 60228 / IEC 60332 / ISO 13628-5 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42)
Sheath colour & metre marking: Continuous metre-marked black outer finish (LSZH Cross-Linked XLPO)
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) subsea & marine configurations

Manufactured to MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard for subsea, offshore, deep-well and marine applications.

Dimensions, tensile load & weights
Order designation	Configuration	Core / stranding	Outer Ø ≈ mm	Net weight ≈ kg/km	Tensile rating kN ≈	Min. bend R mm
MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Construction Schedule (−30…+105 °C)
MIL-DTL-24643 Config A (Compact)	4×2×24 AWG + 2×18 AWG (or 4C)	Stranded tinned Cu (IEC 60228 / ASTM)	10.4	155	4.5	85
MIL-DTL-24643 Config B (Standard)	4×2×20 AWG + 4×16 AWG (or 8C)	Stranded tinned Cu (IEC 60228 / ASTM)	13.3	265	9.6	110
MIL-DTL-24643 Config C (Heavy Hybrid)	8×2×20 AWG + 4×12 AWG (or 12C)	Stranded tinned Cu (IEC 60228 / ASTM)	16.6	420	18.5	140

Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
Custom core cross-sections, pair/fibre counts, armour grades and factory drum lengths available per MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
4×2×24 AWG + 2×18 AWG (or 4C)	28.40	600 V (45–100 Ω data)	−30…+105 °C
4×2×20 AWG + 4×16 AWG (or 8C)	10.70	600 V (45–100 Ω data)	−30…+105 °C
8×2×20 AWG + 4×12 AWG (or 12C)	5.40	600 V (High-Power Hybrid)	−30…+105 °C

Every production length undergoes routine conductor DC resistance, high-voltage dielectric or OTDR continuity and dimensional verification.

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
Conductor resistance, continuity & dimensional verification (MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard)	DC resistance at 20 °C / optical attenuation and outer diameter within MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard)	Zero dielectric breakdown and verified insulation resistance for 600 V rating	Every manufactured drum length
Sample tests
Hydrostatic pressure, water-blocking & mechanical endurance qualification (MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard)	Verified submersion integrity, tensile load and thermal stability across −30…+105 °C	Type qualification & periodic lot audit

Inspection certificate

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

Product approvals

MIL-DTL-24643/56 & /57 CompliantEN 10204 3.1 Factory Test CertificateCE, RoHS 2 (2011/65/EU) & REACH

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) MIL-DTL-24643/56 & /57 600 V CE

Delivery form: Heavy-duty export fumigated wooden drums or steel subsea reels
Standard lengths: 500 m, 1,000 m or custom continuous subsea/wellbore lengths
MOQ: 100 m (standard configurations) · 500 m (custom builds)
Lead time: 2–5 weeks ex-works
Incoterms: EXW, FCA, FOB, CIF, DAP

Technical documents

Downloads

PDFMIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Submarine Cable – technical datasheet3 sizes · construction, technical data, approvals XLSXMIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) spec data (Excel)All 3 sizes with dimensions and data, for your BOM or quotation

Revision: 2026-10-25
Updated: 2026-10-25

FAQ

Questions engineers ask first

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

What governing standard and construction define MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) (MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Submarine Cable)?

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) (MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Submarine Cable) is manufactured in accordance with MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard for 600 V service over -30 °C to +105 °C. Its 5-layer construction comprises watertight pairs (7×2×16 awg / 42×2×26 awg), individual pair braid & tapes (ls2swl-7) and cross-linked polyolefin jacket (xlpo).

What is the minimum bending radius and operating temperature range for MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42)?

The minimum bending radius for MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) is 8 × OD across its continuous operating temperature range of -30 °C to +105 °C, ensuring mechanical and dielectric reliability in subsea, marine and submersible service.

How are the concentric layers of MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Watertight Pairs (7×2×16 AWG / 42×2×26 AWG) — Longitudinally water-blocked tinned copper conductors with XLPE insulation; (02) Individual Pair Braid & Tapes (LS2SWL-7) — Tin-coated copper braid shield + two sealed polyester tapes over each 16 AWG pair; (03) Watertight Core & Separator Tape — Water-Blocking / watertight fillers preventing inter-compartment flooding; (04) Double Overall Tin-Coated Copper Braid — Dual overall copper braid shields meeting MIL-DTL-24643 EMP & Zt limits; (05) Cross-Linked Polyolefin Jacket (XLPO) — 1.65–1.91 mm black low-smoke zero-halogen XLPO outer sheath (optional Al armor).

What factory test certificates are supplied with MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42)?

Every production drum of MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per MIL-DTL-24643/56F & /57F EMP-Shielded Submarine Standard, and is delivered with an EN 10204 3.1 factory test certificate.

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02Reel & motion

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03Message for our engineers

MIL-DTL-24643/56 & /57 (LS2SWL-7 / LS2UWS-42) Submarine Cable

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Reel & motion:
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