Conductor: Copper/Aluminium wire, stranded to BS 6360 class 2. Conductor Screen: The conductor screen consists of an extruded layer of non metallic, semi-conducting compound applied on top of a semi-conducting tape. The conductor screen is applied under triple extrusion process over the conductor along with the insulation and the insulation screen. The extruded semi-conducting compound is firmly bonded to the insulation to exclude all air voids and can be easily hand stripped on site. Insulation: Extruded cross-linked polyethylene (XLPE-GP8) compound insulation Insulation Screen: The insulation screen consists of an extruded layer of non metallic, semi-conducting compound extruded over the insulation of each core. The extruded semi-conducting layer shall consist of bonded or cold strippable semi-conducting compound capable of removal for jointing or terminating. Semi-conductive Water Blocking Swellable Tape: A semi-conducting tape shall be applied over the core assembly as a bedding for the metallic layer. The minimum thickness is 0.3 mm and the maximum resistivity is 500 Ohm-m at 90°C. The screen is tightly fitted to the insulation to exclude all air voids and can be easily hand stripped on site. The screen may be covered by semi-conductive water blocking swellable tape to ensure longitudinal watertightness. Metallic Layer: The metallic layer may be applied over the core assembly collectively. The metallic screen shall consist of either copper tapes or a concentric layer of copper wires or a combination of tapes and wires. Swellable Tape: Swellable material Separation Sheath: Aluminum Tape sheath Outer Sheath: Thermoplastic HDPE-ST3 compound

CONSTRUCTION PARAMETER

Nom. Cross-Section	Nom. Insulation	Copper Wire Screen	Approx. Overall	Approx. Weight
Area	Thickness	Area	Diameter	CU	AL
mm²	mm	mm²	mm	kg/m
240	13	25	56.9	4.7	2.9
300	13	25	59.9	5.4	3.3
400	13	35	61.5	6.4	4
500	13	35	65	8.4	4.9

ELECTRICAL PROPERTIES

Nom. Cross-	DC		AC		Capacitance	Inductance	Continuous Current Rating for Single Circuit (in air)
Section	Resistance @20°C		Resistance @90°C		per core		Cu conductor		Al conductor
Area	Cu	Al	Cu	Al			Trefoil	Flat	Trefoil		Flat
mm²	Ω/km	Ω/km	Ω/km	Ω/km	µF/km	mH/km	A		A
240	0.0754	0.125	0.0973	0.161	0.174	0.414	576	715	449	557
300	0.0601	0.1	0.0781	0.129	0.189	0.397	658	820	515	642
400	0.047	0.0778	0.0618	0.101	0.207	0.381	762	955	601	752
500	0.0366	0.0605	0.0492	0.0776	0.19	0.372	877	1108	753	838