Cable jointing in Singapore — your questions answered

A cable jointer is a certified specialist who joins, terminates and tests power cables. In Singapore, cable jointers work on both LV and HV cables up to 22kV for commercial, industrial and utility projects.

Yes. SG Cable Specialist's cable jointers are SP Group / SP PowerGrid permitted and undergo yearly assessment to maintain their permit. We also hold manufacturer certifications on all the major joint kit systems used across the Singapore power distribution network — Raychem, NKT, Pfisterer, 3M and Cellpack — covering heat-shrink, cold-shrink, pre-moulded, plug-in (separable connectors) and resin cast HV and LV cable joints and terminations up to 22kV.

LV (low voltage) cable jointing covers cables up to 1kV — typically building services and distribution. HV (high voltage) cable jointing in Singapore covers 6.6kV, 11kV and 22kV cables on the primary distribution network, requiring specialised joint kits and stricter installation conditions.

We work on XLPE, PILC, EPR and PVC cables, both single-core and three-core, with copper or aluminium conductors.

Yes. We provide indoor and outdoor cable termination services for HV and LV cables, including heat-shrink, cold-shrink and pre-moulded termination systems.

Yes. We provide turnkey underground cable installation in Singapore — route survey, trenching, ducting, cable pulling, jointing, termination and testing.

We perform VLF (Very Low Frequency) testing, DC Hi-Pot testing, Partial Discharge (PD) diagnostics, Tan Delta (dissipation factor) testing and Insulation Resistance (IR) testing on HV and LV cables — with full test reports to IEEE 400.2 and manufacturer specifications.

Yes. We use TDR pre-location, surge-wave methods and acoustic pinpointing to find HV and LV cable faults underground, then carry out the electrical cable repair on the same mobilisation.

Cable spiking drives a steel spike through a cable to confirm it is de-energised before cutting. It's industry best practice — and effectively mandatory — for HV cables before any cut or joint.

Cutting or spiking the wrong cable is a serious safety hazard and can shut down adjacent services. Positive cable identification — live or de-energised — confirms the target cable before any intrusive work.

Yes. We have on-call cable jointer teams ready to mobilise for emergency cable jointing, cable fault location and electrical cable repair across Singapore — fast on-site response when you need urgent restoration.

We cover all of Singapore — commercial, industrial and utility projects island-wide. This includes Jurong, Tuas, Changi, Woodlands, Tampines, Sengkang, Ang Mo Kio, the CBD / Marina area and every industrial estate on the island.

Yes. Our cable jointers hold the SP PowerGrid cable jointer permit, which is subject to yearly assessment, and we are manufacturer-certified on the joint systems used across the SP network — Raychem, NKT, Pfisterer, 3M and Cellpack.

Yes. 22kV cable jointing and termination is one of our core services, alongside 11kV and 6.6kV — on XLPE and PILC cables, single and three-core, copper and aluminium.

LT (low tension) covers cables up to 1kV — typically 230V/400V building services and distribution. HT (high tension) covers 6.6kV, 11kV and 22kV cables on the SP PowerGrid primary distribution network. HT jointing requires SP-permitted cable jointers and stricter installation conditions. See our reference guide on HT vs LT cable jointing in Singapore for details.

Cable jointing in Singapore is governed by SP PowerGrid technical specifications, SS 638 (Electrical Installations) and IEC 60502 / 60840 for the cables themselves. Cable testing is typically performed to IEEE 400.2 (VLF testing of shielded power cables) and the joint manufacturer's specification.

Yes. SG Cable Specialist Pte Ltd is a Singapore-registered company and we can supply our UEN, GST registration, insurance and ACRA bizfile on request for tender submissions.