Cable
Electrical cabling in heavy commercial vehicles and trailers is far more than a technical detail. Every lighting circuit, braking system and control function depends on cables that are correctly specified for the application, fitted with the right connectors and built to withstand the harsh conditions of road transport. Dekoff supplies a comprehensive range of cables for the truck and trailer sector, covering every use case encountered by trailer builders, HGV workshops, body builders and fleet maintenance teams.
The trailer cable category forms the core of this offering. Semi-trailer cable and HGV cable in FLYY and FLRYY constructions are designed for installation along trailer undersides, where moisture, mechanical stress, vibration and temperature extremes are constant factors. These trailer wiring harness-compatible cable types are available in conductor configurations ranging from three cores for basic lighting circuits up to fifteen cores for complex multi-function trailers. The 7-core connection based on ISO 1185, in both Type-N and Type-S configurations, remains the most widely used standard for the electrical link between tractor and trailer across Europe. For trailers requiring more circuits, the 15-core variant based on ISO 12098 is increasingly specified, accommodating additional functions such as cameras, cooling systems and supplementary signal circuits.
For braking system cabling, specific requirements apply. EBS cables for electronic braking systems connect the tractor control unit to the trailer brake module and must meet the specifications of ISO 7638 for both signal and power supply. Trailers involved in the transport of hazardous goods are subject to ADR/GGVS regulations, which impose additional requirements on electrical connections and associated cabling. ABS system cables for semi-trailers are likewise designed for the vibration and moisture exposure typical of chassis-level installation.
For general wiring work in the HGV workshop, the range includes several installation cable types suited to different demands. FLRY-B single-core automotive cable is the most widely used type for vehicle wiring in the European market and complies with ISO 6722, which defines the thermal and mechanical requirements for cables in motor vehicles. H07V-K flexible installation cable is used for fixed and semi-fixed routing in switchboards and distribution systems. Multi-core control cables of the YSLY or LIYY type are designed for signalling and automation circuits where multiple conductors are grouped within a single sheath.
For applications involving heavy mechanical stress, chemical exposure or outdoor use, neoprene and PUR cables offer superior performance. Neoprene-sheathed cable withstands oil, UV radiation and abrasion, making it suitable for trailer chassis installations. PUR cables combine flexibility with cut resistance and chemical resilience, properties required for loadlift connections, mobile links and external trailer applications.
With the growth of electric and hybrid drivetrains in heavy transport, high voltage cable has become an increasingly relevant segment. Cable types certified to EN 50618 and complying with LV216 specifications are designed for voltages up to 600V AC or 900V DC and require a distinct installation approach compared to conventional 12V or 24V vehicle wiring. These cables are a fixed part of the electrical architecture in battery-electric trucks and are supplied accordingly.
Beyond individual cable lengths, the category also covers ready-to-install cables with connectors pre-fitted, cable reels for organised storage and dispensing in the workshop, twin cables for two-wire supply circuits, speaker cable for cabin audio systems, and junction blocks for centralising multiple electrical circuits at a single distribution point. Together these products provide trailer builders, semi-trailer specialists, body builders and commercial vehicle garages with everything required to wire, maintain and extend electrical systems in trucks and trailers from a single source.