EV Charging Cable Assembly

The global transition to electric vehicles has created massive demand for high-quality, safety-certified EV charging cable assemblies. From residential Level 2 wall chargers to 350 kW DC fast charging stations lining highway corridors, every EVSE installation depends on cable assemblies that can safely deliver high currents thousands of times over the product lifetime. As a specialized EV charging cable manufacturer, OurPCB delivers complete cable assembly solutions from prototype through volume production.

EV charging cables face unique engineering challenges that distinguish them from standard power cable assemblies. They must carry high currents (32A–500A) while remaining flexible enough for consumers to handle daily. They operate outdoors in extreme temperatures, UV exposure, and wet conditions year-round. They integrate control pilot and proximity pilot signal wires alongside power conductors for the EVSE safety handshake. And they must survive 10,000+ mating cycles — far more than typical industrial connectors. Our engineering team designs every cable assembly to meet these demands from the conductor level up.

For Level 2 AC charging — the workhorse of the EV charging ecosystem — we manufacture cable assemblies with SAE J1772 and NACS connectors rated from 16A to 80A. These cables use fine-strand Class 5 or Class 6 copper conductors for superior flexibility, with TPE or silicone jackets that remain pliable in cold weather. The overmolded cable-to-connector interface provides strain relief and IP55+ environmental sealing. Every cable includes properly routed CP and PP signal conductors for charging communication.

DC fast charging cables represent the cutting edge of EV and new energy cable technology. At 150–350 kW, standard air-cooled cables would need conductors so large that the cable becomes too heavy and rigid for consumer use. Liquid-cooled cable technology solves this by circulating coolant through the cable jacket, allowing smaller conductors to carry higher currents. We manufacture both air-cooled and liquid-cooled DC fast charging cables with CCS Combo 1, CCS Combo 2, and CHAdeMO connectors.

The high-voltage wire harness technology behind EV charging cables requires meticulous attention to insulation integrity. At 800V–1000V DC, partial discharge and insulation breakdown become critical failure modes. We use high-voltage rated insulation materials (XLPE, silicone) and perform hi-pot testing at 2x rated voltage on 100% of production. Our testing capabilities include automated hi-pot testing to 5 kV DC, insulation resistance measurement, and ground continuity verification per UL 2594.

Looking ahead, Megawatt Charging System (MCS) cables for electric trucks and buses will require current ratings up to 3,000A at 1,250V DC — a 3.75 MW charging rate that demands advanced liquid cooling and new connector designs specified in SAE J3068. Our battery cable assembly experience with high-current busbars and waterproof cable assemblies positions us to support the next generation of heavy-duty EV charging infrastructure.

Quality and safety are non-negotiable for EV charging cables. Our manufacturing follows UL standards and ISO 9001 quality management processes. Every cable undergoes precision crimping verified by cross-section analysis, and the complete assembly passes through our quality inspection process before shipment. Contact us to discuss your EV charging cable assembly requirements.