As Nigeria accelerates its industrialization drive, new industrial parks are being developed across the country to host manufacturing facilities, logistics centers, and SMEs. Reliable medium-voltage (MV) power distribution is critical to ensure continuous operations. QZ Cable supplied 11kV/33kV XLPE-insulated power cables and matching cable terminations for the electrification of a large industrial park in Lagos State.
Standards: IEC 60502-2, BS 6622
Voltage Class: 6/10kV, 12/20kV, 18/30kV, and 19/33kV
Conductor: Compact stranded copper or aluminum (Class 2)
Conductor Screen: Semi-conductive extruded compound
Insulation: XLPE (Cross-Linked Polyethylene), thickness 5.5 mm (11kV), 8 mm (33kV)
Insulation Screen: Semi-conductive extruded layer + copper tape
Metallic Screen: Copper wires or copper tape (min. 10 mm² cross-section)
Armoring (optional): Galvanized steel wire armor (SWA) for mechanical protection
Sheath: PVC or PE (black, UV-resistant)
Sizes Delivered: 150 mm², 240 mm², and 400 mm²
Type: Heat-shrink and cold-shrink terminations (up to 36kV)
Insulating Material: Silicone rubber / heat-shrink polyolefin
Creepage Distance: ≥ 31 mm/kV for outdoor terminations (tropical climate design)
Included Components: Stress control tubing, insulating sleeves, breakout, sealing mastic, earthing kit
Standards: IEC 60840, IEEE 48
The industrial park required reliable and safe distribution from the local 132/33kV substation to various facilities. QZ Cable provided:
Primary 33kV feeders using 400 mm² copper XLPE cables.
Secondary 11kV distribution loops using 150–240 mm² aluminum XLPE cables.
Indoor terminations for switchgear panels.
Outdoor terminations for transformer bushings and cable poles.
This hybrid solution ensured efficient load distribution while reducing technical losses and providing long-term reliability under Nigeria’s hot and humid climate.
Before export, all cables and terminations underwent:
Routine Tests (IEC 60502-2): conductor resistance, partial discharge (<5 pC), AC withstand voltage, sheath integrity.
Type Tests: heating cycle test, impulse withstand voltage, short-circuit performance.
Accessories Tests: dielectric withstand, salt-fog test, thermal aging.
Cables were certified by SON (Standards Organization of Nigeria) in addition to IEC compliance.
Cables: Shipped in wooden drums, 500 m lengths, moisture-protected with steel reinforcement for sea transport.
Terminations: Exported in kits, with all components individually packed for site installation.
Delivery Mode: Split into three batches to align with construction milestones (substation, distribution, and plant connection phases).
Integrated Package: Providing both MV cables and accessories from one source simplified procurement and ensured technical compatibility.
Tropicalized Design: Outdoor terminations supplied with extended creepage distance and UV resistance to suit Nigeria’s climate.
After-Sales Support: On-site training for local contractors on cable jointing and termination installation.
