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Product

marine & naval control cable DEF STAN 02-525 / 02-526440/600 V (-30 to +105 °C)NES 518 Low Fire Hazard (LFH) Sheath

DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard CableDEF STAN 02-525 / 02-526 — 440/600 V — -30 to +105 °C Marine & Offshore Cable

DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard Cable (DEF STAN 02-525 / 02-526) engineered for 440/600 V service across -30 to +105 °C (min. bend radius 6 × OD).

Flame-retardant

EMC screen

Oil-resistant

Approved

Configuration

Order designation: DEF STAN 61-12 PART 25 4G2.5 mm²
Outer Ø ≈: 13.2 mm
Net weight ≈: 275 kg/km
Tensile rating ≈: 1.5 kN
Core / stranding: IEC 60228 Class 2/5 Cu/SnCu

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: 440/600 V
Operating temp.: −30…+105 °C
Min. bend radius: 6 × OD
Core / conductor: Flexible Tinned
Outer protection: NES 518 Low Fire
Standard: DEF STAN 02-525

Typical values for this cable type, based on UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25 — confirmed in the datasheet and quotation for your order.

Application fit

Is DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) right for your machine?

DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard Cable (DEF STAN 02-525 / 02-526) engineered for 440/600 V service across -30 to +105 °C (min. bend radius 6 × OD).

Fixed installation

Suitable

High-density multi-core construction routes compactly through marine cable trays, bulkheads and equipment racks.

Switchgear & control cabinet wiring

Suitable

Number-coded or colour-coded cores simplify termination inside marine switchgear, bridge consoles and control panels.

Offshore platform & shipboard deck trays

Suitable

Cross-linked LFH/SHF1/Type P jacket resists marine oils, lubricants, moisture and mechanical abrasion.

Drilling jumbo & rotary mast feed

Suitable

High-coverage copper or bronze braid provides both mechanical protection and 360° EMC screening.

Vertical / spreader reel

Not suitable

Fixed shipboard and naval control cable is not intended for vertical deepwater lift winches.

Use A304739 BOP MUX Umbilical

Typical machinesMarine & Offshore CableNaval Frigate, Destroyer & Submarine SystemsShipboard Propulsion & Auxiliary ControlOffshore Drilling Rig Control RoomsMarine Switchgear & Console Interconnects

Construction

Layer by layer

Shown: DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) (UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25) featuring flexible tinned copper (7×1.5 mm²), thin-wall lfh cross-linked insulation and nes 518 low fire hazard (lfh) sheath (4-layer construction).

Schematic, not to scale — generated from the layer data

#	Layer	Material & reference
1	Flexible Tinned Copper (7×1.5 mm²)	Class 5 tinned annealed copper conductors per BS EN 60228
2	Thin-Wall LFH Cross-Linked Insulation	White number-coded Low Fire Hazard cross-linked insulation
3	Tinned Copper / Steel Braid (NES 526 / 5	Braided tinned copper screen or galvanized steel wire armour
4	NES 518 Low Fire Hazard (LFH) Sheath	Black low-smoke zero-halogen low-toxicity elastomer jacket (NES 713)

DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) — Standard Shipboard & Offshore Execution

Built to UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25 with flexible tinned copper (7×1.5 mm²) and nes 518 low fire hazard (lfh) sheath

DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) — Custom Drum Length & Gland Kit

Available in custom continuous shipboard/offshore drum lengths or with marine EMC cable glands

DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) — Class & Routine Test Certified

Supplied with EN 10204 3.1 routine dielectric, conductor resistance & flame/fire test report

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage / transmission duty: 440/600 V (UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25)
Core / conductor construction: Flexible Tinned Copper (7×1.5 mm²) — Class 5 tinned annealed copper conductors per BS EN 60228
Primary dielectric / buffering: Thin-Wall LFH Cross-Linked Insulation — White number-coded Low Fire Hazard cross-linked insulation

Thermal

Continuous operating temperature: −30…+105 °C (shipboard & offshore duty)
Short-circuit / peak thermal rating: Verified thermal stability per UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25
Storage & transport temperature: −40…+80 °C on export wooden/steel drum

Mechanical

Outer protection / armouring: NES 518 Low Fire Hazard (LFH) Sheath — Black low-smoke zero-halogen low-toxicity elastomer jacket (NES 713)
Minimum bending radius: 6 × OD
Armour, screen & mechanical duty: Tinned Copper / Steel Braid (NES 526 / 525) — Braided tinned copper screen or galvanized steel wire armour

Resistance

Flame, fire & smoke performance: Qualified for marine flame-retardance and low-smoke zero-halogen / fire safety per UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25
Oil, drilling mud & seawater resistance: Resistant to marine fuel/lube oils, salt mist and offshore fluids per UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25
RoHS & REACH compliance: RoHS 2 (2011/65/EU + 2015/863) & REACH SVHC compliant

Reference standards

Governing standard: UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25
Environmental & test standards: IEC 60228 / IEC 60332-3-22 / IEC 60754 / IEC 61034 / EN 10204
Quality management & inspection: ISO 9001:2015 & EN 10204 3.1 factory routine inspection

Identification

Model designation: DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH)
Sheath colour & metre marking: Continuous metre-marked black outer finish (NES 518 Low Fire)
Customs tariff (HS): 8544.49 / 8544.60 / 8544.70

Sizes

3 standard DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) shipboard & offshore configurations

Manufactured to UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25 for shipboard, offshore platform, drilling rig 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
DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) Construction Schedule (−30…+105 °C)
DEF STAN 61-12 PART 25 4G2.5 mm²	4 × 2.5 mm² (or 4C × 14 AWG)	IEC 60228 Class 2/5 Cu/SnCu	13.2	275	1.5	80
DEF STAN 61-12 PART 25 7G2.5 mm²	7 × 2.5 mm² (or 7C × 14 AWG)	IEC 60228 Class 2/5 Cu/SnCu	15.8	415	2.6	95
DEF STAN 61-12 PART 25 12G1.5 mm²	12 × 1.5 mm² (or 12C × 16 AWG)	IEC 60228 Class 2/5 Cu/SnCu	17.4	495	2.7	105

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 UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25.

Electrical, optical & thermal parameters
Configuration	Max. DC R₂₀ / Atten. Ω/km or dB/km	Rating / Impedance	Operating temp.
4 × 2.5 mm² (or 4C × 14 AWG)	7.98	440/600 V (26 A)	−30…+105 °C
7 × 2.5 mm² (or 7C × 14 AWG)	7.98	440/600 V (21 A)	−30…+105 °C
12 × 1.5 mm² (or 12C × 16 AWG)	13.30	440/600 V (14 A)	−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 (UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25)	DC resistance at 20 °C / optical attenuation and outer diameter within UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25 tolerances	Every manufactured drum length
High-voltage dielectric & insulation resistance test (UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25)	Zero dielectric breakdown and verified insulation resistance for 440/600 V rating	Every manufactured drum length
Sample tests
Flame, fire integrity, oil/mud & mechanical qualification (UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25)	Verified flame/fire performance, fluid resistance 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

DEF STAN 02-525 / 02-526 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 DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) DEF STAN 02-525 / 02-526 440/600 V CE

Delivery form: Heavy-duty export fumigated wooden drums or steel marine reels
Standard lengths: 500 m, 1,000 m or custom continuous shipboard/offshore 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

PDFDEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboa – technical datasheet3 sizes · construction, technical data, approvals XLSXDEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) 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 DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) (DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard Cable)?

DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) (DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard Cable) is manufactured in accordance with UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25 for 440/600 V service over -30 to +105 °C. Its 4-layer construction comprises flexible tinned copper (7×1.5 mm²), thin-wall lfh cross-linked insulation and nes 518 low fire hazard (lfh) sheath.

What is the minimum bending radius and operating temperature range for DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH)?

The minimum bending radius for DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) is 6 × OD across its continuous operating temperature range of -30 to +105 °C, ensuring mechanical and dielectric reliability in shipboard and offshore service.

How are the concentric layers of DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) arranged from inside to outside?

From inside to outside, the construction sequence is: (01) Flexible Tinned Copper (7×1.5 mm²) — Class 5 tinned annealed copper conductors per BS EN 60228; (02) Thin-Wall LFH Cross-Linked Insulation — White number-coded Low Fire Hazard cross-linked insulation; (03) Tinned Copper / Steel Braid (NES 526 / 525) — Braided tinned copper screen or galvanized steel wire armour; (04) NES 518 Low Fire Hazard (LFH) Sheath — Black low-smoke zero-halogen low-toxicity elastomer jacket (NES 713).

What factory test certificates are supplied with DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH)?

Every production drum of DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH) undergoes routine conductor resistance/continuity, high-voltage dielectric and dimensional testing per UK MoD DEF STAN 02-525 (NES 525) / 02-526 (NES 526) & DEF STAN 61-12 Part 25, and is delivered with an EN 10204 3.1 factory test certificate.

Request a quote

Get an engineering quote for DEF STAN 61-12 PART 25 & NES 525 / NES 526 (LFH)

Your selection and application details are copied into the enquiry form below.

01Selected sizes

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02Reel & motion

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Reel typeDrum core diameter (mm)Cable length on drum (m)Travel speed (m/min)Max. accelerationCycles per hourLength and quantityAmbient temperatureExposure (outdoor, water, oil, abrasion)Destination countryEquipment and operating conditions

03Message for our engineers

DEF STAN 61-12 Part 25 & NES 525 / NES 526 440/600 V LFH Naval Shipboard Cable

Selected sizes:


Reel & motion:
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- Travel speed (m/min): 
- Max. acceleration: 
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- Length and quantity: 
- Ambient temperature: 
- Exposure (outdoor, water, oil, abrasion): 
- Destination country: 
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