Lead Sheathed Cable 8.7/15 kV (IEC 60502) for Refinery & Factory Power Networks

Moisture, hydrocarbons, and corrosive vapors kill ordinary MV cables in months. Not years. Months. In a refinery or chemical processing plant, that means unscheduled outages, lost throughput, and a safety review that no plant manager wants on their desk. The 8.7/15 kV lead sheathed cable, designed and tested to IEC 60502, removes that variable. It combines an impervious metallic barrier with XLPE insulation to deliver a network service life that routinely exceeds three decades. This translates directly into a lower total cost of ownership—fewer replacements, no cable-related shutdowns, and a more predictable capital expenditure cycle for your factory.

Hermetic Lead Sheath Barrier

• [Feature]: Seamless extruded lead-alloy sheath applied directly over the semiconducting bedding layer.
• [Advantage]: Absolute impermeability to water, damp soil, H₂S, benzene, and process acids. -> [Benefit]: A buried feeder in a refinery tank farm will not suffer from insulation degradation or treeing. Expect 30+ years of operation instead of the 5–8 year replacement cycle common with taped or polymer-only covered cables.

Full Compliance with IEC 60502-2 for 8.7/15 kV

• [Feature]: Cable design, partial discharge performance, and impulse withstand verified against IEC 60502-2.
• [Advantage]: Guaranteed 10 pC partial discharge extinction level at 1.73 U₀ and full sequence type-test reports. -> [Benefit]: Your procurement and commissioning teams receive a fully certified product. No delays for third-party re-testing before energization. Integration into your plant’s asset integrity program is immediate.

Robust Mechanical & Fire Performance

• [Feature]: The lead sheath acts as a natural flame barrier, augmented by a helically applied steel tape armour and a flame-retardant PVC ST2 outer jacket.
• [Advantage]: High hoop strength, vibration tolerance, and zero flame propagation under IEC 60332-1-2. -> [Benefit]: Cable trays above compressor stations or along hot pipe racks in a refinery keep their circuit integrity. If a localized fire occurs, the sheath prevents fire flashover into adjacent cable bunches—keeping critical pumps running.

Long Factory Spooling & Installation Efficiency

• [Feature]: Continuous drum lengths up to 1,200 metres per segment, with custom cut lengths upon request.
• [Advantage]: Vastly fewer straight joints in an underground radial feeder network. -> [Benefit]: Reduces man-hour costs, potential joint failure points, and the need for mid-span pull boxes. Critical when routing between a main substation and a fluid catalytic cracking unit where every joint is a liability.

Technical Construction & Operating Parameters

Note: Custom cross-sections up to 630 mm² are available. Detailed drawings and ampacity ratings (based on IEC 60287) are provided with quotation.

Industry Validation: Where 8.7/15 kV Lead Sheathed Cables Operate

• Oil Refineries and Tank Farms. Solves the problem of benzene, crude oil, and ground water attacking jacket materials. Lead sheathing prevents the permanent dielectric damage that plagues aluminium laminate tapes in saturated soils.
• Chemical Processing Plants. Withstands external exposure to hydrochloric acid vapour, caustic mist, and process solvents that quickly embrittle standard PVC or PE jackets. Maintains insulation resistance even when conduit or tray systems sweat.
• Underground Feeder Networks for Factory Complexes. Acts as a permanent radial moisture barrier. Eliminates the need to encase cables in conduits simply to stop water ingress, reducing trench width and material cost on large factory expansions.
• Power Generation Balance-of-Plant. Feeds auxiliary transformers, boiler feed pumps, and cooling towers where constant vibration causes fatigue in rigid piping and cable screens. The malleable lead sheath flexes without cracking.
• Offshore Platform and FPSO Topside. Used where a metal shield is required to stop gas migration through the cable core. The lead sheath combined with an LSZH outer jacket meets stringent platform fire and smoke toxicity specs.

International Compliance & QA Verification

• ✅ IEC 60502-2: Type-tested for 8.7/15 kV power cables with extruded insulation.
• ✅ ISO 9001:2015 certified manufacturing, with full material traceability from rod to cable drum.
• ✅ Flame Retardance: Verified single cable flame test per IEC 60332-1-2.
• ✅ Conductor Resistance: Tested to IEC 60228, Class 2.
• ✅ Partial Discharge: Tested at ambient and elevated temperature; guarantee ≤10 pC at 1.73 U₀.
• ✅ Routine test reports (AC voltage withstand, insulation resistance) shipped inside each drum.
• ✅ Material RoHS compliance with applicable exemption (lead in functional metallic sheathing).

FAQ: Lead Sheathed MV Cable Selection

How does a lead sheath compare to an aluminium laminate or polymer moisture barrier for humid, acidic soils?
Aluminium laminates are barrier tapes. They have longitudinal folds and can develop pinholes during pull-in. A seamless lead sheath is a continuous metal barrier—there is no path for gas or water vapour entry. In an oil refinery’s ground where soil pH regularly drops below 4.5, laminate barriers fail by slow chemical attack at overlaps. Lead doesn’t. Once moisture reaches the insulation, cable failure is a matter of weeks. This is why brownfield projects with corrosive soil backfill invariably specify lead sheathed cables.

Can this 8.7/15 kV cable be direct-buried without additional conduit in a plant setting?
Yes. When equipped with a PVC ST2 outer jacket and, depending on site mechanical risk, a galvanized steel tape armour, the cable is designed for direct burial. The lead sheath provides a hermetic water seal. The outer jacket handles abrasion and mild chemical contact. However, we always recommend performing a soil thermal resistivity survey and ampacity de-rating study per IEC 60287 for the specific trench configuration. This ensures the cable doesn’t run into hot spots that chronically degrade the XLPE insulation at the molecular level over the first 5 years.

What is the typical manufacturing window for a custom refinery project requiring 15 km of 3-core 240 mm² lead cable?
Standard lead-time sits at 8–10 weeks after final drawing approval. This includes the source inspection and routine testing for each drum. We maintain strategic alloy and rod inventory specifically for refinery framework agreements, which allows us to compress that to 6 weeks for emergency replacements during scheduled turnarounds. All cable is shipped on sturdy, export-grade steel-reinforced drums, secured and lagged for breakbulk or containerized sea freight.

Send Your Network Layout for a Complete Feed-In Package
Every refinery has a unique diagram and a different chemical exposure profile. Send our engineering team your single-line schematic, preferred conductor material, and soil or tray conditions. You will receive a pro forma technical proposal with ampacity calculations, drum scheduling, and support for on-site jointing procedure qualification. Write to our regional office or complete the inquiry form on this page to start.