Deekay Electricals are authorized distributor and dealer for Polycab Instrumentation Cables. These cables have multiple conductor cables which pass low energy electrical signal which are used for monitoring and controlling power systems and processes.
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In case where individual shielding is required, the above element are wrapped first with Plain polyester, then the drain wire is laid parallel, over it Aluminum- polyester tape is applied with Aluminum side touching the drain wire. Above this a plain polyester tape is applied for shield isolation from other shields.
There is a confusion in specifying the cable required. If you ask for 24 Core X 1.50 sq.mm cable, we take 2 cores and twist them in one direction, above that 8 cores are laid in opposite direction and above that 14 cores are laid and it looks as drawing (a).
If you specify 12 Pair cable, first we take 2 cores and twist them to form a pair, 3 such pairs are again laid up, above that 9 such pairs are laid up to form a 12 pair cable and it look as drawing (b).
The diameter of multi paired cable is always more than that of multicore core cable having the same number of insulated cores and hence multi pair construction is always costlier.
NOTE: One Pair and Two Core cables are generally the same.
The cables which are used in the Power, Control or Signal Circuit of emergency equipment’s shall be Fire Resistant to ensure higher safety and performance in the event of fire.
This critical equipment’s such as Alarm, Lift Power Supply, Emergency Lights, Exit Lights, Water Spray system and other important functions are connected with these cables.
- Maintains the circuit in operation for few hours to ensure emergency operation in the event of fire.
- Ensures Power availability during fire.
- Can save life and damages in the event of fire.
- Does not emit toxic gases hence safe to human and electronic equipment’s
- Low and white smoke does not affect visibility in enclosed areas
- All cable components are non-toxic, having low emission of smoke and acidic nature.
- Conductor: Annealed Plain / Tinned Copper / Aluminum-IS:8130 IIEC 60228/ BS 6360.
- Fire Barrier: 2 Layers of Glass Mica Tape.
- Insulation: EPR or XLPE or Silicone Rubber.
- Fire Barrier Tape: Glass Fiber Tape over laid up cores.
- Inner Sheath: FRLS / LSZH
- Armour: IS:3975, BS:7846
- Outer Sheath: FRLS PVC ST 2, LSZH
Fire Resistant or Fire Survival Cables shall be with LSZH / LSOH / ZHFR sheathing for better performance under fire.
