Outer Jacket Blue, Intrinsic Safety, Flexible, EMI Preferred Type
https://www.hitechcontrols.com/cables/control_cable/intrinsic_safe/oz_bl_cy.html

Application:

For hazardous areas the cables with special marking (blue) (hazard type-i-) used as flexible control and measuring cables to meet the requirements for the installation of electrical apparatus. These installations are not grounded and require a separate power circuit. Those cables are not suitable for underground laying.
The copper braided shielding ensures the transmission of data signals and free from interference.
EMI = Electromagnetic Interference
To optimize the EMI features we recommend a large round contact of the copper braiding on both ends.
CE= The product is conformed with the EC Low-Voltage Directive 73/23/EEC and 93/68/EEC

Cable Construction

• Bare copper, fine wire conductors bunch stranded to DIN VDE 0295 cl. 5, BS 6360 cl. 5 and IEC 60228 cl. 5
• Conductor insulation of special PVC Z 7225
• Black conductors with white continuous figure imprint to DIN VDE 0293 without ground conductor
• Conductors stranded in layers with optimal lay-length
• Conductor wrapping of plastic foil
• Braiding, tinned copper wire shielding, approx. 85% coverage
• Special PVC outer jacket TM2, to DIN VDE 0281 part 1 and HD 21.1
• Color: Blue (RAL 5015)

Properties

• Extensively oil resistant
  Chemical Resistance – see table Technical Information.
• PVC self-extinguishing and flame retardant according to VDE 0482-332-1-2, DIN EN 60332-1-2 / IEC 60332-1 (equivalent DIN VDE 0472 part 804 test method B)
• The materials used in manufacture are cadmium-free, contain no silicone and are free from substances harmful to the wetting properties of lacquers

Technical Data

• Control cable, special PVC with blue outer jacket for hazardous areas to hazard type -i- (=intrinsically safe)
• For intrinsically safe installation marking as per DIN EN 60079-14 and IEC 60079-14 section 12.2.2 (VDE 0165 part 1)
• Temperature Range Flexing -5°C to +80°C (+22°F to +176°F), Fixed Installation  -40°C to +80°C (-40°F to +176°F)
• Nominal Voltage U₀/U 300/500 V
• Test Voltage 3000 V
• Breakdown Voltage min. 6000 V
• Insulation Resistance Min. 20 MOhm x km
• Mutual Capacitance Conductor/conductor approx. 140 nF/km, Conductor/screen approx. 187 nF/km
• Inductance approx. 0.68 mH/km
• Coupling Resistance Max. 250 Ohm/km
• Minimum Bending Radius Flexing 10x cable Ø Fixed Installation 5x cable Ø
• Radiation Resistance Up to 80×10⁶ cJ/kg (up to 80 Mrad)\