Laying Up

In multicore cables, cores are laid up together with a suitable lay, the outer most layer is laid up in right hand and successive layer with opposite lay. The interstices are filled with non-hygroscopic material wherever necessary to make the laid-up cores circular.

Inner Sheath

The laid up cores are provided with the PVC inner sheath by extrusion or by wrapping of PVC Tape. Single core cables do not have inner sheath.

Armouring

Armouring is applied over inner sheath incase the calculated diameter over inner sheath does not exceed 13 mm, the armour consists of galvanized round steel wires. Where the calculated diameter over the inner sheath is greater than 13 mm the armour generally consists of flat steel. If required, the cable can be manufactured with steel wire where calculated diameter of cable exceeds 13 mm. Single core cables are provided with Aluminium Wire/Strip armouring.

Outer Sheath

Outer Sheath is of PVC compound applied by extrusion over Insulation in case of unarmoured single core cables, over inner sheath in case of unarmoured multicore cables & over armouring in case of armoured cables.

The name'GEMSCAB' is embossed on the outer sheath of the cable at regular intervals. The word ELECTRIC is also embossed to distinguish these cables from Mining Cables. The FRLS/FR cables bear an additional legend FRLS or FR as the case may be. Any other information required by the customer can also be embossed.

Constituents	Code
Aluminum conductor	A
XLPE insulation	2X
PVC insulation	Y
Steel round wire armour	W
Steel strip armour	F
Steel double round wire armour	WW
Steel double strip armour	FF
Non-magnetic (A1) round wire armour	Wa
Non-magnetic (A1) strip armour	Fa
PVC outer sheath	Y