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Design Features :

Parameters Materials
1. Conductor Electrolytic grade Annealed high conductivity plain or tinned, solid or stranded copper wires.
2. Insulation PVC/HRPVC/POLYETHYLENE (PE)
3. Core & Pair Identification Colouring of Insulation, number printing, Ring marking or combination of above schemes.
4. Pairing Two cores twisted to form a pair with staggered lay lengths for minimizing cross talk.
5. Individual pair screening Pairs screened with Aluminium Mylar Tape (100% coverage) having Tinned / Untinned Copper drain wire under the screen longitudinally along the length, in contact with the Aluminium face.
The Aluminium Mylar Tape screening ensures exact data and pulse transmission, protecting the cable against electromagnetic disturbances and interferences.
6. Pair laying-up Pair laid up in suitable condition
7. Binder tape (optional) PETP (Melinex) tape
8. Collective Screening With Aluminium Mylar Tape (100% coverage) having Tinned / Untinned Copper drain wire under the screen longitudinally along the length, in contact with the Aluminium face.
The Aluminium Mylar Tape screening ensures exact data and pulse transmission, protecting the cable against electromagnetic disturbances and interferences.
9. Inner Sheath ( for armoured cables) Extruded PVC/FRLS PVC.
10. Armour Galvanised steel round wires / Flat strips
11. Outer Sheath PVC/HRPVC/FRLS/PVC

Design Selection :

Types Features Applicable (Ref. Design Sl.No.)
A Individual pair screen and
collective screen with armour 		All
B Individual pair screen with armour All excluding 8
C Collective screen with armour All excluding 5
D Collective screen without armour All excluding 5,9 & 10
E Individual pair screen without armour All excluding 8,9 & 10
F Individual pair screen and
collective screen without armour 		All excluding 9 &

Size Selection :

Cond. Size in Sq, mm. No./dia (mm) of wires
Solid Stranded
0.5 1/0.8 7/0.3
0.75 1/0.98 7/0.37
0.8 1/1.0 7/0.38
1.0 1/1.13 7/0.43
1.5 1/1.38 7/0.53
2.5 1/1.78 7/0.67


Properties determining the cable characteristics Cable Specification
  • Conductor resistance
 IS : 1554/1-88
  • Dielectric constant
 IS : 5608/1-91
  • Volume resistivity at 27°C
 IS : 5608/II-70
  • Mutual capacitance
 IS : 5608/III-76
  • Co-axial capacitance
 BS. 5308/I&II-86
  • Characteristic Impedence
 IEC-189-2-81
  • Cross talk attenuation
 VDE 0815
  • Inductance
VDE 0816
  • Attenuation
IS : 694-90

Selection for Fire Hazard Protection : The cable is provided with a Fire Retardant Low Smoke Low Halogen (FRLS) PVC sheath. The FRLS properties are stated in the table below:

Properties Value Specification
Oxygen Index 29 (minimum) at room temperature ASTM-D-2863
Temperature Index 250°C (minimum) at Oxygen Index of 21 ASTM-D-2863 and chapter VI of BICC handbook
Smoke Density Rating 60% (maximum) ASTM-D-2843
Acid gas generation 20% (maximum) by weight IEC 754 Part I
Flammability Test Passes SS 424 1475 Class F3, IEEE 383 and IEC 332 Part - 1

Application : Suitable for installation in dry, damp, dusty, salty corrosive and heavily polluted environment. Suitable for fixed installation in open air on outside walls and also for under ground burial with armour and black outer sheath.


** Note : We also manufacture FIRE SURVIVAL ELASTOMERIC INSTRUMENTATION CABLES for critical zone and emergency equipments which are designed to operate under fire conditions without the emission of highly corrosive fumes

 
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