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Manufacturing

Manufacturing

Annual production capacity is documented at 1.1 million km, recorded from the 2026 company catalogue.

Production runs on the group's own equipment. The stages below follow the order they run on the production floor — conductor stranding, insulation extrusion, cross-linking, laying-up, screening and armouring, sheathing and coiling, followed by the conductor resistance and dimensional tests carried out on finished cable.

Documented capacity

Annual production capacity
1.1 million km 2026 company catalogue

Capacity figures are published with the document they come from. A figure without a source is not published.

Production Line

Ten stages in process order

Photographed on the group's own production floor and arranged in process order — conductor stranding and insulation extrusion, cross-linking, laying-up, screening and armouring, sheathing and coiling, followed by the conductor resistance and dimensional tests each order passes before dispatch.

  1. 1+6 tubular stranding machine in the control cable workshop

    Step 01

    Conductor stranding

    Wires are paid off from bobbins and stranded into the conductor.

  2. 90 mm extruder line in the control cable workshop

    Step 02

    Insulation extrusion

    Insulation compound is extruded over the stranded conductor.

  3. Catenary three-layer co-extrusion cross-linking line in the cable workshop

    Step 03

    Cross-linking

    The extruded insulation is cross-linked in a continuous catenary line, which raises the maximum conductor temperature the cable can carry.

  4. 315-type laying-up machine in the power cable workshop

    Step 04

    Laying-up

    Insulated cores are laid up into the cable core.

  5. Row of blue-framed machines with green cable reels along a workshop line

    Step 05

    Screening and armouring

    Screening and armouring are applied where the design calls for them.

  6. Cable production line with extruder, cooling trough and haul-off

    Step 06

    Sheathing

    Sheathing compound is extruded over the cable core.

  7. A long row of empty wooden cable drums with dark steel bands, lined up on the concrete yard outside the factory, with workshop buildings and the setting sun behind them

    Step 07

    Coiling onto drums

    Finished cable is coiled onto delivery drums.

  8. QJ36 digital resistance bridge for conductor DC resistance testing

    Step 08

    Conductor resistance testing

    Conductor resistance is measured on finished cable.

  9. DTA optical projector for cable dimension measurement

    Step 09

    Dimensional inspection

    Insulation and sheath thickness are measured on a projector.

  10. Finished cables wound on steel-wooden drums in the workshop

    Step 10

    Packing and dispatch

    Cable is stored on steel-wooden drums before dispatch.

Further views of the production floor.

Insulation, screening and cross-linking

The insulation route through the works: three-layer co-extrusion with online diameter measurement, UV cross-linking as a second route, and copper-tape screening. The three-layer co-extrusion line is the route taken by high-voltage cable, 66 kV to 110 kV.

On Request — Subject to Project-level Technical Review

Rubber compounding and continuous vulcanisation

Rubber-insulated cable takes a separate route: compound is mixed and refined in the rubber workshop, then extruded and vulcanised continuously.

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