Electra Cables | 2.5mm Twin & Earth Flat Cable 450/750V | Purple Non-Migratory
The Electra Cables SRF3025VHT-100P is a 2.5mm twin and earth flat cable rated 450/750V, supplied as a 100-metre drum with purple non-migratory PVC insulation and sheathing. The SRF3025VHT-100P carries three cores (two active, one earth) and is designed for installations where the cable contacts polystyrene, ABS, polycarbonate, or acrylic materials without deterioration. The cable complies with AS/NZS 5000.2 and suits light to medium industrial applications and all internal building wiring.
Electricians favour flat twin and earth cables for renovation work and retrofit installations where space is tight. The SRF3025VHT-100P strips and terminates easily on switchboards, eliminates the need to run separate earth conduit, and carries the full 10A load on a standard residential circuit. When installing in contact with polystyrene (caravans, cold rooms, transportable buildings, wall or roof batts), the non-migratory sheath prevents plasticiser leaching and insulation degradation that occurs with standard TPS cables, meaning the installation remains safe during maintenance or future building work.
The SRF3025VHT-100P delivers quick dispatch and wholesale pricing through Sparky Direct, with the full 100-metre drum available in stock. Licensed electricians wired it up on day-of-order jobs and return for repeat supplies once they confirm stock depth and the straight trade price. The purple sheath makes circuit identification straightforward on multi-cable runs, and the flat profile fits standard 16mm and 20mm wall boxes without excess coiling.
Features
- 450/750V rating — dual voltage rating suits standard domestic and light commercial installations on 230V single-phase circuits, with headroom for peak loads.
- Non-migratory PVC sheath — polystyrene-compatible insulation prevents plasticiser leaching when the cable is in contact with polystyrene, ABS, polycarbonate, or acrylic, extending service life in caravans, cold rooms, and transportable buildings.
- Twin and earth configuration — three cores (active, neutral, earth) in one flat run eliminate separate earth conduit and simplify termination on switchboards.
- 2.5mm conductor — carries 10A circuit load on standard domestic lighting and power subcircuits protected by 10A MCB or RCD.
- Plain annealed copper — conductors meet AS/NZS 1125, strip cleanly, and land firmly on neutral and earth bars without special tooling.
- Flat profile — 12.4mm wide by 5.5mm deep fits standard wall boxes (16mm and 20mm depth) without bunching or excess coil, reducing install time on tight installations.
- 100-metre drum — the SRF3025VHT-100P arrives as a full spool, minimising on-site joins and keeping continuity earth paths clean during certification testing.
- Purple sheathing — distinguishes the cable on multi-run switchboard installs, supporting circuit tracing during maintenance and helping apprentices identify the run during remedial work.
- Suitable for renovation and retrofit — the flat form and non-migratory specification make the SRF3025VHT-100P the default choice for existing building upgrades where polystyrene batt or foam cavity is present.
- AS/NZS 5000.2 compliance — meets Australian building wiring standards for domestic and light commercial use without restriction.
Where to use
- Renovation and retrofit wiring — the SRF3025VHT-100P is installed through wall cavities, roof spaces, and floor voids lined with polystyrene batts or foam, where non-migratory sheath prevents cable degradation.
- Caravan and transportable building installations — polystyrene foam lining is standard in caravans and temporary structures, making non-migratory cable essential for safe long-term operation.
- Cold-room and industrial chiller wiring — polyurethane and polystyrene insulation in cold rooms creates an ideal environment for plasticiser leaching from standard cables; the SRF3025VHT-100P avoids this.
- Domestic lighting and power circuits — on 10A MCB or RCD protection, the SRF3025VHT-100P wires lights, GPOs, and exhaust fans in standard residential switchboards.
- Switchboard extensions and sub-board feeds — the three-core design suits both single-phase circuits and single-phase extensions from main boards to sub-boards in multi-board installations.
- Multi-cable runs — the purple sheath helps distinguish the SRF3025VHT-100P on boards with mixed cable colours, simplifying troubleshooting and circuit identification.
- Fast-track new builds and townhouses — the full 100-metre spool minimises joins, and wholesale pricing from Sparky Direct keeps cable costs down on bulk wiring jobs.
Do not use the SRF3025VHT-100P in wet areas (bathrooms, laundries, kitchens above bench level, outdoor/exposed locations) without additional conduit or weatherproof cable. The PVC sheath is not rated for splash zones or external walls. The SRF3025VHT-100P is an internal wiring cable only.
Polystyrene contact — important safety guidance: While the SRF3025VHT-100P is designed for installations in contact with polystyrene (its non-migratory sheath prevents degradation), all electricians should be aware of the risks standard TPS/PVC cables face when in contact with polystyrene materials. For detailed guidance on cable selection, installation methods, and maintenance of both new and existing polystyrene-contact installations, refer to WorkSafe QLD's guidance on TPS/PVC cables in contact with polystyrene products.
