Finding a Chinese Equivalent for a Prysmian LV Armoured Cable

The LV case is different from MV/HV

A previous guide in this column walked through substitution challenges of a Hitachi MV/HV XLPE cable, where the stakes are insulation integrity and a witnessed test regime. At LV the insulation is rarely the problem. What decides equivalence is the construction discipline (conductor class, armour, oversheath, flame grade) and the accessory system: glands, cleats, and termination kits are sized to an overall diameter, and they are bought in bulk before the cable arrives.

A buyer holding a Prysmian 0.6/1 kV armoured specification, for a plant distribution run, a feeder, a pump or a lighting main, is usually really asking one thing: can a Chinese construction meet the same standard text, and will my installers bolt it up without a second accessory order?

The nine parameters that decide it

Run the checklist against the datasheet and the certificate, not against a brand name.

1. Conductor. Copper or aluminium, cross-sectional area, class per IEC 60228 (class 1 solid, class 2 stranded, class 5 flexible). At LV, class 5 flexible vs class 2 stranded is a genuinely different cable: different gland arrangements and different bending behaviour. Pick what the reference actually says.
2. Insulation type. PVC, XLPE or LSZH, with nominal thickness per IEC 60502-1 (or BS 5467 / BS 6346 where the spec is UK-anchored). LSZH is not an upsell: where the project names low smoke and halogen-free, a PVC substitution is an automatic reject at review.
3. Rated voltage designation. 0.6/1 kV must match exactly, including any 1.8/3 kV variant the reference names. It is not approximate.
4. Armour. Steel wire (SWA) or steel tape (STA) or aluminium wire (AWA, needed on single-core runs where steel wire acts as a magnetising path). AWA versus SWA on single-core is a real engineering constraint, not a preference.
5. Oversheath material and flame grade. PVC, PE or LSZH, and the flame-propagation grade: IEC 60332-1 (single cable) vs 60332-3 (bunched). Bunched is the harder test; projects usually name one explicitly and auditors read the certificate line, not the catalogue cover.
6. Fire resistance, where named. If the reference cable is a fire-resistant type (circuit integrity under IEC 60331 conditions), the substitute must show the same circuit-integrity test, under the same conditions (voltage retained, mechanical shock, water spray). This is a heavier regime than flame spread and a far more common substitution failure.
7. Temperature ratings. Continuous conductor temperature (90 °C XLPE, 70 °C PVC) and short-circuit temperature. These drive derating groups and protective-coordination assumptions already priced into the design.
8. Overall diameter and accessories. Glands, cleats, and termination kit ranges are quoted per diameter band. If the substitute construction’s overall diameter falls outside the range the accessory maker qualified, the substitution quietly becomes an accessory re-purchase and often an installer dispute. Ask the accessory supplier to confirm compatibility in writing.
9. Test regime per drum. Routine tests on every drum (conductor resistance and voltage withstand) supplied as factory test certificates. Without these, you have a datasheet, not evidence.

Where “close enough” turns expensive

• Flame-grade certificates citing only the standard number. “IEC 60332 compliant” on a brochure is not a test result. The certificate must name the construction and the clause (single-cable or bunched) and point to the report.
• Silent section substitution on small orders. A factory running the section it already stocks, without recalculating voltage-drop or derating groups, is the most common quiet change we see on small panel and pump-house orders. The conductor area arrives “close” and nobody flagged the calculation that quietly no longer closes.
• Accessory mismatch discovered on site. By the time installers cannot seat the gland, the drum is on your project. The diameter check belongs before award, not at it.
• Fire-resistance cables offered as merely flame-retardant. Two different duties, two different test regimes, often confused by resellers. When the circuit must survive a fire (alarm circuits, emergency lighting, fire pump), treat it as a circuit-integrity specification and demand the IEC 60331 test evidence, not a flame-spread certificate.

Keep it or switch it

• If the specification is fully standard (copper class 2, XLPE 0.6/1 kV, SWA, PVC oversheath, IEC 60332-3-24 for bunched runs, standard drum lengths) and the Chinese factory can show a report naming exactly that construction, an equivalent is defensible and the price gap usually pays the re-test.
• If the circuit is fire-critical, treat substitution as a qualification exercise against IEC 60331, not a purchase.
• If the accessory kit is already ordered against the original overall diameter, either match the diameter or re-buy the accessories and re-schedule.
• If your destination authority or EPC maintains an approved-product list, read it first. Specification equivalence cannot override procurement rules you don’t control.

SpecSourcing runs a free 48-hour initial screen returning a go / hold / walk signal on one supplier against the cable construction on your order. The paid Spec Match tier reverse-engineers the parameters and shortlists manufacturers whose line covers them.