This Narva 7 Core 4 mm Suzi Coil steps in when you need to link heavy-duty sockets to large round sockets on a truck and trailer. The coiled lead stretches out to about 4.6 metres, giving enough reach for normal trailer articulation without the cable dragging. With 7 cores in the sheath, you can run standard lighting, brake and accessory circuits through one tidy length of wire.

Inside the jacket you get six 4 mm conductors at roughly 2 mm² and one 5 mm conductor at roughly 3 mm², so the higher draw circuit has more copper to work with. That layout keeps voltage drop under control across the 4.6 metre span, which matters once you add work lights or extra markers. The Suzi coil form helps the lead spring back between the truck and trailer, a smart buy for gear that sees day-in, day-out highway and yard use.

• Narva 7 core Suzi coil trailer cable
• Total cable length of 4.6 metres
• Six 4 mm (2 mm²) conductor cores
• One 5 mm (3 mm²) higher load core
• Suits 7 pin trailer wiring applications
• Adapts heavy-duty sockets to large round sockets
• Coiled design helps prevent cable dragging
• Suitable for truck and trailer electrical connections
• Supports lighting, brake and accessory circuits
• Supplied as bare cable ready for termination

Q: Can this Narva Suzi coil be used between a prime mover and multiple trailers?

It can be used between a single truck and a single trailer only. The 4.6 metre length and coil format are set up for one trailer lead. For multi trailer road trains you would normally run separate intermediate connectors. Keeping it to one trailer keeps the voltage drop predictable along the 7 cores. It also keeps cable strain manageable at both sockets.

Q: Does the cable come pre-fitted with plugs or sockets?

No, this listing is for the Suzi coil cable only. You will need to attach suitable heavy-duty and large round 7 pin plugs or sockets separately. This lets auto electricians match the cable to your existing connector hardware. It also means damaged ends can be replaced without changing the whole coil. Always have terminations done by a qualified person.

Q: Is the 3 mm² core intended for a specific function?

It is generally suited to the highest current circuit in the loom. Many setups use the larger 3 mm² conductor for auxiliary power or similar higher draw loads. The extra copper cross section helps manage voltage drop on that line. Your auto electrician can assign it according to your trailer wiring plan. The remaining 2 mm² cores then cover lighting and signal lines.

Q: Can the 4.6 metre coil be shortened if there is excess length?

Physical cutting will change the factory coil behaviour and is not recommended. Trimming the cable alters how the coil retracts between truck and trailer. It can also affect the reach during tight turns or reversing. If length is a concern, speak with an installer about routing or strain relief options. Using the supplied 4.6 metre length keeps performance consistent with Narva’s specification.

Gear: 7 core Suzi coil cable for trailer wiring.

Primary application: Required to adapt trucks or trailers with heavy-duty sockets to large round sockets and vice versa.

Connector style: Suits 7 pin trailer wiring layouts where a Suzi coil is used between truck and trailer.

Usage context: Suitable for installations needing 7 core cable runs of up to 4.6 metres between heavy-duty and large round sockets.

Fitment notes: Installation requires compatible heavy-duty and large round 7 pin sockets and appropriate electrical terminations.