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Product

Mineral-Insulated Metal-Sheathed (MICC) Cables500 V / 750 VBS EN 60702-1Inorganic MgO + Cu

BS EN 60702-1 Mineral-Insulated Metal-Sheathed Power Cable500 V / 750 V compressed MgO mineral-insulated seamless copper-sheathed power cable

BS EN 60702-1 (MICC / BTTZ) is a true inorganic fire-survival power cable constructed from solid high-conductivity copper rods embedded in compressed magnesium oxide (MgO) mineral powder inside a seamless drawn copper tube (melting point 1083 °C, MgO 2800 °C),

950 °C+ Inorganic
BS EN 60702-1
Seamless Cu Tube
Order designation
3L1.5 (500 V Light Duty)
Outer Ø ≈
7.6 mm
Copper weight
82 kg/km
Total weight ≈
140 kg/km
Min. bend R
46 mm
All sizes (15)
Request a quoteDatasheetWhatsApp
Engineering reply in 2 business hoursCut-to-length export drumsEN 10204 3.1 certificate per drum
Rated voltage
500 V / 750 V
Light duty 500 V · Heavy duty 750 V
Fire survival
BS 6387 CWZ / F1
Inorganic MgO (2800 °C) & Cu (1083 °C)
Insulation
Compressed MgO
Non-ageing inorganic magnesium oxide
Metal sheath
Seamless Cu tube
Acts as armour + 100 % CPC earth path
Bare Cu temp.
Up to +250 °C
Continuous bare sheath (+105 °C LSZH)
Min. bend radius
6 × cable OD
Permanent formed bends

Typical values for this cable type, based on BS EN 60702-1 / IEC 60702-1 — confirmed in the datasheet and quotation for your order.

Application fit

Is BS EN 60702-1 right for your machine?

The ultimate fire-survival cable for high-rise risers, nuclear facilities, underground metro networks, petrochemical zones and heritage buildings where zero organic fuel load and 950–1000 °C survival are mandatory.

Fixed installation

Suitable

Surface clipped or tray mounted; seamless copper tube needs no conduit and serves as the CPC.

Furnace, kiln & high-temp zone

Suitable

Bare copper-sheathed MICC operates continuously up to +250 °C ambient near furnaces and boilers.

TBM gantry & advancing tunnel reel

Suitable

Completely inorganic core produces zero smoke, zero droplets and zero halogen gas in tunnel fires.

Motorised monospiral reel

Not suitable

Work-hardened drawn copper tube and solid copper rods are strictly for fixed installation.

S07HXHX flexible LSZH
Typical machinesHigh-rise & super-tall towersUnderground metro & railOil, gas & ATEX zonesNuclear & power stationsHeritage & public buildings

Construction

Layer by layer

Solid C101/C103 high-conductivity copper conductors + tightly compacted MgO mineral insulation + seamless phosphorus-deoxidized copper tube + optional LSZH outer covering.

1234
Schematic, not to scale — generated from the layer data
#LayerMaterial & reference
1Solid copper conductor rodsHigh-conductivity annealed solid copper rods per BS EN 60702-1BS EN 60702-1
2Compacted MgO mineralHighly compressed anhydrous magnesium oxide (MgO) powder (melting point 2800 °C)BS EN 60702-1
3Seamless copper sheathSeamless drawn phosphorus-deoxidized copper tube (melting point 1083 °C) providing gas/water tightness and CPCBS EN 60702-1
4LSZH outer coveringOptional extruded zero-halogen polyolefin corrosion covering (orange or red)BS EN 60702-1

500 V Light Duty (CC / LSF)

2, 3, 4, 7, 12 and 19 cores from 1.0 to 2.5 mm² for fire alarm, emergency lighting and control circuits.

750 V Heavy Duty (HD / BTTZ)

1, 2, 3 and 4 cores from 1.5 to 240 mm² for high-current life-safety sub-mains and firefighting risers.

Technical data

Ratings & operating limits

Typical values: Typical values for this cable type, based on BS EN 60702-1 / IEC 60702-1. Values for your order are confirmed in the datasheet and quotation.

Electrical

Rated voltage
500 V (Light Duty) / 750 V (Heavy Duty)
Routine AC test voltage
1.5 kV (500 V grade) / 2.5 kV (750 V grade) for 1 min
Insulation resistance @ 20 °C
≥1000 MΩ·km (dry sealed termination)

Thermal

Bare copper sheath continuous temp.
Up to +250 °C (short-term up to +1000 °C)
LSZH covered continuous temp.
-40 °C to +105 °C
Copper / MgO melting points
Cu: 1083 °C · MgO: 2800 °C

Mechanical

Min. permanent bend radius
6 × cable outer diameter
Radial crushing & impact
Withstands flattening to 50 % OD without short-circuit

Resistance

Fire, water & shock
BS 6387 Cat. C, W, Z & BS 8491 Cat. F120 (120 min)
Reaction to fire (bare MICC)
Euroclass A1 non-combustible
Water & gas ingress
100 % impermeable seamless copper tube

Reference standards

Cable specification
BS EN 60702-1 / IEC 60702-1
Terminations specification
BS EN 60702-2 / IEC 60702-2 brass pot & gland seal

Identification

Core identification
Identified by continuity testing at brass pot termination and sleeved tails
Outer finish
Bare copper or LSZH orange / red / white

Sizes

15 standard configurations (BS EN 60702-1)

Nominal dimensions, masses and electrical ratings for BS EN 60702-1 according to BS EN 60702-1 / IEC 60702-1.

Dimensions & masses
DesignationCores × mm²Cross-sectionOuter Ø ≈
mm		Copper
kg/km		Total weight ≈
kg/km		Min. bend R
fixed mm		Enquiry
BS EN 60702-1 standard series
2L1.5 (500 V Light Duty)2×1.51.5 mm²7.26511843
2L2.5 (500 V Light Duty)2×2.52.5 mm²8.19516049
3L1.5 (500 V Light Duty)3×1.51.5 mm²7.68214046
4L1.5 (500 V Light Duty)4×1.51.5 mm²8.310217050
4L2.5 (500 V Light Duty)4×2.52.5 mm²9.415223556
2H2.5 (750 V Heavy Duty)2×2.52.5 mm²10.113022561
4H4 (750 V Heavy Duty)4×44.0 mm²12.626541576
4H6 (750 V Heavy Duty)4×66.0 mm²13.836553583
4H10 (750 V Heavy Duty)4×1010 mm²15.856078095
4H16 (750 V Heavy Duty)4×1616 mm²18.08301,110108
4H25 (750 V Heavy Duty)4×2525 mm²21.01,2401,620126
1H70 (750 V Heavy Duty)1×7070 mm²14.88601,07089
1H120 (750 V Heavy Duty)1×120120 mm²18.21,4101,710109
1H185 (750 V Heavy Duty)1×185185 mm²21.62,1202,510130
1H240 (750 V Heavy Duty)1×240240 mm²24.42,7203,190146
  • Typical values for this cable type; dimensions and weights for your order are confirmed in the quotation.
  • Nominal outer diameters and weights are subject to manufacturing tolerances per BS EN 60702-1 / IEC 60702-1.

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.

  1. ConductorClass 5 stranding
  2. Spark test100 % in-line
  3. Lay-upCores, earth, fillers
  4. SheathingInner, braid / screen, outer
  5. Electrical testsAC voltage, resistance
  6. DimensionsOD, wall thickness
  7. Inspection documents & dispatchDrum & dispatch
Testing & inspectionTest value / referenceFrequency
Routine tests
1.5 kV / 2.5 kV AC dielectric test & IR check≥1000 MΩ·km insulation resistance and zero breakdown100 % of coils/drums
Seamless copper sheath pressure & integrity checkEddy-current & dimensional verification of drawn Cu tube100 % of lengths
Sample tests
BS 6387 CWZ & BS 8491 F120 fire + impact + waterFull circuit continuity at 950 °C with shock and water sprayType qualification

Inspection certificate

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

Product approvals

BS EN 60702-1 / IEC 60702-1BS 6387 CWZBS 8491 Cat. F120BS 5839-1 Enhanced & BS 8519 Cat. 3Euroclass A1 (bare Cu)

Company certificates

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

Marking & supply

Ordering & delivery

Sheath marking

TEBAOFLEX MICC BS EN 60702-1 750V 4H16 LSZH [year]
Delivery form
Fumigated export wooden drums or shrink-wrapped coils
Standard drum lengths
500 m · 1000 m standard drums (cut lengths on request)
MOQ
100 m (stock sizes) · 300–500 m (production)
Lead time
2–4 weeks ex-works
Incoterms
EXW, FOB, CIF, DAP

Technical documents

Downloads

PDFBS EN 60702-1 Mineral-Insulated Metal-Sheathed Power Cable – technical datasheet15 sizes · construction, technical data, approvalsXLSXBS EN 60702-1 spec data (Excel)All 15 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.

Why does BS EN 60702-1 mineral-insulated cable outlast polymeric cables in extreme fires?
Polymeric cables rely on organic insulation that decomposes above 300–400 °C, leaving a fragile mica-ash barrier. BS EN 60702-1 uses compressed inorganic magnesium oxide (MgO, melting at 2800 °C) inside a solid seamless copper sheath (melting at 1083 °C), so it neither burns nor degrades up to 1000 °C.
Why must mineral-insulated cables be terminated with BS EN 60702-2 brass pots?
Compressed magnesium oxide powder is hygroscopic and will absorb atmospheric moisture at cut ends if left unsealed. Screwing a BS EN 60702-2 brass pot onto the stripped copper sheath and filling it with moisture-curing compound permanently seals the MgO dielectric.
When should 500 V Light Duty versus 750 V Heavy Duty MICC be selected?
500 V Light Duty (1.0 to 4.0 mm²) is designed for BS 5839-1 Enhanced fire alarm loops, emergency lighting and BMS control circuits. 750 V Heavy Duty features a thicker MgO dielectric wall and copper sheath for three-phase life-safety power feeders up to 240 mm².
Does the seamless copper sheath eliminate the need for a separate earth core?
Yes. Under BS 7671 and BS EN 60702-1, the low-resistance seamless copper tube provides a continuous 360-degree circuit protective conductor (CPC) with cross-sectional conductance exceeding the phase conductors on most multi-core sizes.

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BS EN 60702-1 Mineral-Insulated Metal-Sheathed Power Cable

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