This Narva 10A 3mm 5 Core Trailer Cable comes in a 100 metre roll, so you can run full length lines on box trailers and campers without joins. Each of the five cores is rated to 10A, which suits standard 12V lighting circuits. The colour set of red, green, yellow, white and brown keeps your brake, indicator and tail light feeds easy to track when you are fault finding on the side of the road.

Inside the sheath you get oxygen free copper with a cross section of 1.13mm² per core and a strand makeup of 14 x 0.32mm, so the wire stays flexible when you route it along chassis rails. The insulation and sheath use RoHS compliant PVC, which handles typical Aussie trailer use from coastal air to dusty tracks. The black outer sheath adds protection where the cable rubs on brackets or feeds through steel holes, making this a smart buy for workshop stock.

• Narva 10A 3mm 5 core trailer cable
• Supplied on a 100 metre roll
• Suitable for 12V trailer and automotive wiring
• Five core colours: red, green, yellow, white, brown
• Outer sheath colour: black
• Oxygen free copper conductors for reliable conductivity
• Conductor cross section of 1.13mm² per core
• Strand configuration 14 strands of 0.32mm diameter
• Insulation and sheath made from RoHS compliant PVC
• Category: electrical wiring cable for 3mm applications

Q: Can this cable be used for both brakes and tail lights on a trailer?

Yes, the 5 core layout and 10A rating per core suit typical brake, tail and indicator light circuits. You can dedicate separate coloured cores to stop, tail, left indicator, right indicator and earth. Always match fuse sizes to the actual load on each circuit. Keep total current on any single core within the 10A rating.

Q: What is the strand configuration of each conductor?

Each conductor uses 14 strands of 0.32mm diameter copper. This 14/0.32 layout gives a cross sectional area of 1.13mm² per core. The fine strands improve flexibility compared with solid wire of the same area. This helps when routing through chassis rails and tight bends. The structure also handles vibration in mobile applications.

Q: What material is used for the insulation and outer sheath?

The cable uses RoHS compliant polyvinyl-chloride for both insulation and sheath. PVC provides electrical insulation around each oxygen free copper core. The outer black PVC sheath adds extra mechanical protection for the bundle. This construction suits typical trailer and automotive wiring environments. The RoHS compliance also means restricted hazardous substances in the plastic formulation.

Q: Is the copper in this cable oxygen free?

Yes, the conductors are made from oxygen free copper. Oxygen free copper helps maintain good conductivity over time. It also reduces oxidation at the strand surface compared with standard copper. This supports stable voltage along long runs like a 100 metre reel. The material choice pairs well with sealed trailer connectors and junction boxes.