All the cables drums leaving "Merit Cables®" works undergo the following tests at final stage of manufacturer:
ROUTINE TESTS
Conductor Resistance Test
High Voltage Test.
ACCEPTANCE TESTS
Conductor Resistance Test
Annealing Test [For Copper]
Tensile strength Test [For Aluminium]
Wrapping Test [For Aluminium]
Thickness of Insulation, Inner sheath & Outer Sheath.
Tensile Strength & Elongation Test of Insulation & Outer Sheath.
Insulation Resistance Test.
High Voltage Test at Room Temperature Test.
Cable Design & Construction
Armoured and Unarmoured Single Core, Twin Core, Three Core and Multicore Copper or Aluminium conductor PVC Insulated & Sheathed cables for Electric supply and control purposes for use on AC voltage upto & including 1100 V or DC upto & including 1500 V to earth.
Conductor:
The most acceptable metals for conductors are Copper or Aluminium due to their high conductivity and ductility. Therefore, Conductor material normally employed in PVC Cables are O, H2, or H4 EC grade Aluminium or high conductivity annealed copper or annealed tinned copper conforming in all respect to---------------------.
As Copper gets higher affinity with Sulphur, it corrodes in the atmostphere where Sulphur fumes are present. In these conditions, tinned copper shall be used. Power Cables are mostly manufactured with Aluminium .Use of Copper has been restricted to Control Cables, Signalling Cables and Mining Cables as per Govt. Directives.
The most economic construction for conductor is solid conductor. As area of conductor increases, solid conductor becomes more stiff and hence difficult to handle. In this connection Stranded Construction is adopted i.e.made of number of strands, arranged in spiral layers in 1+6+12+18+24......formations.
Shaping of conductor is necessary in making Multicore Cables sizes above 10.0 Sq.mm. In aluminium & 6.0 mm in copper conductor to obtain compact and economic design. Here, Stranded Conductors are shaped into a segment of a circle so that when all cores are laid , they form a complete circle.
Insulation:
The PVC covering over conductor is called "INSULATION". It is a specially formulated best quality, high grade of Poly Vinyl Chloride conforming to --------------- and is applied by Extrusion process only. It is resistant to moisure, oils, alkalies, good dielectric and having high Insulation Resistance values, Fire Retarding, Permanent Colors
ROUTINE TESTS
Conductor Resistance Test
High Voltage Test.
ACCEPTANCE TESTS
Conductor Resistance Test
Annealing Test [For Copper]
Tensile strength Test [For Aluminium]
Wrapping Test [For Aluminium]
Thickness of Insulation, Inner sheath & Outer Sheath.
Tensile Strength & Elongation Test of Insulation & Outer Sheath.
Insulation Resistance Test.
High Voltage Test at Room Temperature Test.
Cable Design & Construction
Armoured and Unarmoured Single Core, Twin Core, Three Core and Multicore Copper or Aluminium conductor PVC Insulated & Sheathed cables for Electric supply and control purposes for use on AC voltage upto & including 1100 V or DC upto & including 1500 V to earth.
Conductor:
The most acceptable metals for conductors are Copper or Aluminium due to their high conductivity and ductility. Therefore, Conductor material normally employed in PVC Cables are O, H2, or H4 EC grade Aluminium or high conductivity annealed copper or annealed tinned copper conforming in all respect to---------------------.
As Copper gets higher affinity with Sulphur, it corrodes in the atmostphere where Sulphur fumes are present. In these conditions, tinned copper shall be used. Power Cables are mostly manufactured with Aluminium .Use of Copper has been restricted to Control Cables, Signalling Cables and Mining Cables as per Govt. Directives.
The most economic construction for conductor is solid conductor. As area of conductor increases, solid conductor becomes more stiff and hence difficult to handle. In this connection Stranded Construction is adopted i.e.made of number of strands, arranged in spiral layers in 1+6+12+18+24......formations.
Shaping of conductor is necessary in making Multicore Cables sizes above 10.0 Sq.mm. In aluminium & 6.0 mm in copper conductor to obtain compact and economic design. Here, Stranded Conductors are shaped into a segment of a circle so that when all cores are laid , they form a complete circle.
Insulation:
The PVC covering over conductor is called "INSULATION". It is a specially formulated best quality, high grade of Poly Vinyl Chloride conforming to --------------- and is applied by Extrusion process only. It is resistant to moisure, oils, alkalies, good dielectric and having high Insulation Resistance values, Fire Retarding, Permanent Colors