1.Scopes

This specification is for PVC insulated single phase concentric cables with circular stranded copper conductors for operation up to and including 1000 Volts between phases and 600 Volts to earth .The cable shall have a central phase stranded copper conductor insulated with red PVC and concentric layer comprising bare copper wires (combined neutral-earth conductor)and outer sheath in black PVC.

2.REQUIREMENT

2.1 SERVICE AND SYSTERM CONDITIONS

a)The cable shall be a service cable for continuous operation outdoors and tropical conditions (temperature range of -1°Cto +40°C,humidity of upto 90% and saline conditions along the coast).

b)The cable should be suitable for laying in cable ducts ,in air of underground.

c)Permissible continuous loading operating temperature shall be 70°C.

2.2 MATERIALS AND CONSTRUCTION

2.22Phase conductor

2.221The phase conductor shall be circular stranded annealed copper conductors (class 2)The phase conductor shall have a left -hand director of lay.

2.222 The insulation of the phase conductor shall be red PVC.It shall be applied by an extrusion process and shall be spark tested..

2.23 Concentric layer

2.231The neutral conductor shall be concentric and shall be manufactured from plain annealed copper wires .

2.24  Oversheath

2.241 The ocersheath shall be an extruded layer of black PVC

2.3 STANDARD SIZES AND CHARACTERISTICS

2.31 The characteristics of the cables shall comply with the following cable.

Table 1:Characteristics (as per KS 04-1022)