Mineral-Insulated Fire-Resistant Cable (BTTZ)

Copper-sheathed MI cable for circuit integrity in fire.

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Mineral-Insulated Fire-Resistant Cable (BTTZ)

Product Overview

BTTZ mineral-insulated cable has copper conductors embedded in compacted magnesium-oxide (MgO) insulation, sealed in a seamless copper sheath. It maintains circuit integrity at very high temperatures and is waterproof, radiation-resistant and inherently flame-proof.

Key Features

  • MgO mineral insulation, seamless copper sheath
  • Circuit integrity under fire (IEC 60331)
  • Waterproof, explosion-proof, radiation-resistant
  • High continuous temperature capability
  • Long service life, no ageing of insulation

Technical Specifications

Per IEC 60702-1 (MI cables) and fire performance BS 6387 / IEC 60331.

Rated Voltage (U0/U)0.6/1 kV
ConductorCopper (IEC 60228)
InsulationMagnesium Oxide (MgO), compacted
SheathSeamless copper tube
Max. Operating Temp.250 °C (continuous), 1000 °C (fire)
Fire PerformanceBS 6387 CWZ / IEC 60331
ProtectionWaterproof & flame-proof
StandardsIEC 60702-1, IEC 60331, BS 6387, GB/T 13033, CE

Typical Applications

Fire alarm & emergency lightingLifesafety & evacuation systemsPower plants & tunnelsHigh-risk industrial areas

Standards & Compliance

Manufactured and tested to the following international standards.

IEC 60702-1MI cablesIEC 60331Circuit integrityBS 6387Fire survival (UK)GB/T 13033China MI cableCEEU declaration

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