Key Features of PVC Insulated and sheathed 4 core unarmoured and armoured cable with 1.0Mm to 2.0Mm insulation thickness in phase and neutral

• Conductor: Copper conductors are made from high conductivity Copper rods of 8 mm diameter. The rod is drawn to required sizes for the construction of conductors of different areas of cross section conforming to SS 6360. Conductors for Power Cables with cross sectional area of 25 sq.mm. and above are stranded shaped conforming to Table 2 Class 2 of BS:6360.
• Insulation: PVC Compound is insulated over conductor by extrusion process with required thickness of insulation and conforms to BS:6346:1989.
• Identification of core colours: number of cores 1 for Red or Black, 2 for Red and Black, 3 for Red, Yellow and Blue and 4 for Red, Yellow, Blue and Black.
• Bedding: All multi-core cables of nominal area less than 10 sq.mm have extruded bedding. Cables having nominal area 10 sq.mm and above have either extruded PVC bedding or 2 or more layers of PVC or other synthetic tape
• Armouring: Multi-core armoured cables have single layer of Galvanized Steel wire Armour over bedding with left hand lay.
• Oversheath: Sheaths are extruded with Black PVC compound of type TM 1 and comply with the requirements of BS 6746:1990. When specified anti termite properties can be provided on the sheath.
• Packing, storage and handling: Cables for power supplies are always packed in appropriate sizes of strong and seasoned wooden drums designed to withstand long distance transit and preservation in stores.
• Current ratings: Current ratings of cables installed in air and around buildings reference should be made to`Regulations for electrical installations` [IEE Wiring Regulations], 15th Edition and the current ratings of cables installed in other situations reference should be made to `Current rating standards for distribution cables`, ERA 69-30:Part Ill.
• Minimum installation radius:
• Circular copper conductors, unarmoured: up to 10 mm
• overall diameter = 3D or above 10 mm and up to 25 mm
• overall diameter = 4D or above 25 mm overall diameter = 6D.
• Circular copper conductor armoured and Shaped copper conductors armoured or unarmoured: any overall diameter
• 6D or any overall diameter = 8D
• Conditions of laying:
• Continuous operating temperature of conductor 70° C
• Ambient Temperature 50° C
• Ground Temperature 35°C
• Depth of laying in ground 0.5 m
• Thermal resistivity of ground 120° C cm/W