MEDIUM VOLTAGE · 6.35 / 11 kV · IEC 60502-2
11 kV XLPE Cable
UK / BS 6622 standard MV for utility ring mains, industrial intake and wind farm collection circuits. Three-core or single-core construction, copper or aluminium conductor, manufactured against IEC 60502-2 with project-specific screen sizing, armour and sheath.
§01 — Cable construction
The reference construction, layer by layer.
Typical three-core screened and armoured construction for the 6.35 / 11 kV class. Metallic screen cross-section and bedding thickness are confirmed against the cable schedule before production.
| # | Layer | Reference detail |
|---|---|---|
| 01 | Conductor | Cu class 2 stranded (RM). Sector-shaped (SM) for 3-core ≥ 185 mm². |
| 02 | Conductor screen | Extruded semiconducting compound, ≤ 0.5 mm nominal thickness. |
| 03 | XLPE insulation | Extruded XLPE, 3.4 mm nominal across 16–1 000 mm² at 6.35/11 kV per IEC 60502-2, table 6. |
| 04 | Insulation screen | Extruded semiconducting, strippable or bonded per requirement. |
| 05 | Metallic screen | Cu wire screen per IEC 60502-2; 16 mm² minimum for conductors up to 120 mm², 25 mm² for 150–300 mm², 35 mm² for 400–630 mm² — sized against the ring-main earth-fault duty. |
| 06 | Inner sheath | PVC ST2, extruded bedding. |
| 07 | Armour | Double steel tape (STA) for direct burial; SWA for higher tensile load; AWA for single-core. |
| 08 | Serving | Anti-corrosion wrap on certain designs (optional). |
| 09 | Outer sheath | PVC ST2 black; PE or LSZH on request. |
§02 — Technical specifications
Electrical parameters — 6.35 / 11 kV class.
| Conductor (mm² Cu) | Insulation thickness | DC resistance @20 °C (Ω/km) | Indicative current, direct burial 25 °C (A) |
|---|---|---|---|
| 3 × 35 | 3.4 mm | 0.524 | ~170 |
| 3 × 50 | 3.4 mm | 0.387 | ~205 |
| 3 × 70 | 3.4 mm | 0.268 | ~250 |
| 3 × 95 | 3.4 mm | 0.193 | ~300 |
| 3 × 120 | 3.4 mm | 0.153 | ~345 |
| 3 × 150 | 3.4 mm | 0.124 | ~385 |
| 3 × 185 | 3.4 mm | 0.0991 | ~435 |
| 3 × 240 | 3.4 mm | 0.0754 | ~500 |
| 3 × 300 | 3.4 mm | 0.0601 | ~560 |
| 3 × 400 | 3.4 mm | 0.0470 | ~640 |
DC resistance values per IEC 60228. Indicative current: ground 25 °C, soil thermal resistivity 1.5 K·m/W, depth 1.0 m, flat formation — reference only; final ampacity is calculated against your installation conditions. Overall diameter and weight for this voltage class are issued in the project datasheet with the formal offer.
§03 — Standards
Standards printed on the sheath and on the drum card.
§03b — International equivalence
11 kV cable: IEC 60502-2 vs BS 6622 vs the ICEA/AEIC family.
Most 11 kV tenders name one of three standard families, and they are not interchangeable. We build the conductor, XLPE insulation, screen and armour to whichever one your specification calls up, and we print that designation on the drum card.
IEC 60502-2 · GB/T 12706.2
The reference for most European, Middle-East, South-Asian and African grids. Covers the 6/10 kV and 6.35/11 kV classes up to Uₘ 36 kV. Screen and armour per the project schedule; verifiable by routine test on every drum.
BS 6622 · BS 7835 (LSZH)
The standard written into UK, Australian, Gulf and many African distribution specifications. BS 6622 covers the armoured thermosetting constructions; where low-smoke zero-halogen is required the equivalent sheath standard is BS 7835. Confirm your schedule and we map it across.
ICEA S-10634 · AEIC CS8 · UL 1072
US and Canadian projects normally reference the ICEA / AEIC family with 100 %, 133 % or 173 % insulation levels — a field IEC does not use. Give us the insulation level and the AWG/kcmil size and we translate it into the IEC metric construction.
Structural descriptions you can specify directly: 3 core 185 mm² copper conductor, copper-wire screened, steel-wire armoured (SWA) 11 kV cable; 3 × 300 mm² Cu / XLPE / CWS / STA / PVC, 6.35/11 kV; single-core 630 mm² aluminium, aluminium-wire armoured (AWA) 11 kV feeder cable. Send the schedule in whichever form you hold it — mm² or kcmil, IEC or BS — and we confirm the equivalent construction and issue the offer.
§04 — Applications
Where 11 kV cable from Lulian is in service.
11 kV distribution ring main
Three-core CU/XLPE/CWS/STA/PVC laid direct-buried in footpath or verge. STA armour standard; SWA on rocky routes.
Ring main and feeder solutions →11 kV industrial intake feeder
From utility substation to the consumer main switchboard. Above 300 mm² typically single-core AWA.
Industrial intake and site distribution →Wind farm collection circuit
3-core 11 kV between pad-mount transformers and the pooling substation.
Wind and solar collection systems →Tunnel & metro auxiliary supply
LSZH sheath per IEC 61034 / IEC 60754 confirmed against operator spec.
LSZH sheath for tunnels and metro →Not sure which voltage class your network needs? See all cable applications and sector solutions, or send the system voltage and the earthing method — we confirm the class and the construction in the offer.
§05 — Quality testing
What we test on every drum.
Routine tests run on every drum; sample tests on each batch; type tests on new constructions witnessed by CNAS-accredited third-party labs.
Type tests are carried out at independent, CNAS-accredited third-party laboratories — for example the Qingdao Product Quality Testing Research Institute (CNAS L1184), which issued the type test report for our LSZH control cable (report No. 202521001018). The routine test report for your drum is issued with the shipping documents; the type test report for the construction is available on request with the formal offer. We quote the report number and attach the measured values page rather than describing results in words.
- Conductor DC resistance at 20 °C (routine)
- AC voltage withstand AC 22 kV / 5 min (routine)
- Partial discharge ≤ 10 pC at 11 kV (1.73 U₀) (sample)
- Insulation thickness & eccentricity (sample)
- Metallic screen cross-section (routine)
- Armour coverage & bedding integrity (routine)
- Sheath thickness + spark test (routine)
- Bending test + voltage after bending (type)
- Impulse voltage 95 kV (type)
§06 — Packaging & delivery
Drums sized for the cable, not for the workshop.
Drums sized so the minimum bending radius is preserved during shipping and re-spooling. Wooden drums with fumigation marks for export; steel-plywood drums for heavy cross-sections. Cable ends sealed with heat-shrink caps; shipping marks per the buyer’s format.
Standard drum lengths: 500 / 1000 / 1500 / 2000 m. Lead time: 25–35 working days for stocked constructions; 40–55 working days for project-specific builds.
§07 — FAQ
Common questions on 11 kV cable procurement.
What is the U₀/U rating of 11 kV XLPE cable?
6.35 / 11 kV. U₀ is the rated phase-to-earth voltage, U the phase-to-phase value. The cable suits systems whose maximum operating voltage does not exceed 12 kV. Confirm the earth-fault factor of your system with the utility and we confirm the class.
What conductor cross-sections are available?
Three-core: 25–400 mm². Single-core: 25–630 mm². Copper or aluminium, class 2 stranded; sector-shaped conductors for large 3-core sizes.
Can the cable be direct-buried?
Yes. The armoured construction (STA) with PVC ST2 outer sheath is rated for direct burial. SWA is recommended where tensile load or rodent risk is high.
What is the partial discharge limit?
≤ 10 pC measured at 11 kV (1.73 U₀) per IEC 60502-2. PD is measured on every drum and documented on the routine test report.
What routine and type tests are performed?
Routine on every drum: conductor DC resistance, AC voltage withstand AC 22 kV / 5 min, sheath spark test. Sample: PD, insulation thickness, screen check. Type: bending + voltage, load cycle, impulse voltage 95 kV.
Can the cable be supplied with LSZH sheath?
Yes, for tunnel, metro, data centre and indoor substation use. Verified against IEC 61034 (smoke density) and IEC 60754 (acid gas).
Send the cable schedule. We confirm the construction in 24 hours.
Share voltage class, conductor material & size, core count, armour, sheath, installation method, total length and drum preference.
§08 — Related
Other voltage classes & adjacent products.
DATASHEET
Download the datasheet.
Construction, test values and reference dimensions as a PDF. We send it to your work email address — so the file reaches the engineer who needs it, and so we can answer the dimension questions that follow.
Get the 11 kV XLPE cable datasheet (PDF) by email
Tender pack or procurement portal? Send the enquiry and we add the datasheet and the type test documentation to your document set.
Send an enquiry
Request a quote
Three fields. A technical reply within 24 hours.