Outstanding Properties
In Service
- High Resistance to ageing and abrasion.
- High mechanical strength.
- Moister-proof, corrosion proof, weather proof.
- Resistant to effects of the majority of acids and alkalis
- Resistant to occasional temporary contact with oils and liquid
fuels.
- Flame-retarding-does not support combustion and is self-extinguishing
when the source of ignition is removed.
Installation
- Easy to install.
- Neat appearance.
- Light weight.
- Good bending properties.
- Smooth surface.
- Easy stripping of conductor ends.
- Elimination of indoor cable and boxes(three phase conductors
can be directly connected to distribution boards/motors terminal
boxes)
- High resistance to D.C voltage effects.
- Suitable at steep gradient.
- During the process of change over to cables with plastic insulation
and sheathing, tremendous amount of development work had been
done with the result that PVC Insulated Power and Control Cables
have been firmly established not only for industrial and other
applications but also for power transmission.
Basic Design : NICCO Brand PVC Power and Control
Cables are manufactured confirming to
IS: 1554 (part 1 & 2)
Conductor : Conductors of nominal area less than
16mm² shall be circular only. Conductors of nominal area 16mm²
and above may be circular or shaped.
Cables with reduced neutral conductor shall comply with the Main
Power conductor combination.
Insulation : The conductors are insulated with
PVC compound by extrusion process
Core Identification : Cores shall be identified
by different colouring of PVC insulation. Following colour scheme
shall be adopted :
| Cores |
Red, black, yellow or blue |
| 2 Cores |
Red and black |
| 3 Cores |
Red, yellow and blue |
| 4 Cores |
Red, yellow , blue and black |
| 5 Cores |
Red, yellow , blue, black and grey |
| 6 Cores and above |
(a) Two adjacent cores (counting
and direction core) in each layer, blue and yellow;
remaining cores grey.
(b) As an alternate to colour coding single colour
insulation with number printing can also be provided
for easy core identification. |
| For reduced neutral conductors,
the core shall be black. |
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Inner Sheath : The cores of multicore cables are
laid up and the surrounding by PVC covering either by PVC extrusion
or by wrapping.
Armouring :
Application - Armouring shall be applied over the insulation
in case of single core cables and over the inner sheath in case
of twin-three and multi-core cables.
Type of Armour - Where the calculated diameter below armouring
does exceed 13mm the armour shall consist of galvanized round steel
wires.Where the calculated diameter below armouring does not exceed
13 mm the armour shall consist of either galvanized round steel
wires or galvanized steel strips. Single Core Cables are generally
armoured with wires of non-magnetic materials.
Outer Sheath : This is provided by means of extruded
PVC over the armour for armoured cables; over inner sheath for unarmoured
cables and oiver the insulation for single core unarmoured cable.
Unarmoured multicore cables shall have mono sheath (single extrusion
covering inner and outer sheath.
PVC usually used to manufacture the type of cable are general purpose
PVC suitable to operate at a maximum conductor temperature of 70°C.
HR PVC Cable : Nicco also manufactures power
cables using heat resisting PVC Compound. (Type C/ST2 & OF IS
: 5831). HR PVC Cables can be operated at a maximum conductor temperature
of 85°C and are also suitable for intermittent use at temperature
105°C.
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