The Narva Heavy-Duty 7 Core Suzi Coil runs to 4.6 metres between truck and trailer sockets, so you keep a solid electrical link when the drawbar moves around. The 7 core layout handles standard lighting and auxiliary wiring for bigger towing setups. The coil shape stays compact until you turn, then stretches out instead of dragging on the deck, which helps cut wear and random cable damage while you tackle highway and yard work.

The cable carries 6 x 5 mm cores at 3 mm2 plus 1 x 6 mm core at 5 mm2, so you have a bigger line ready for higher current jobs like charge feeds. The heavy-duty outer keeps the cores covered from stone flick and chassis rub. The Narva build suits local trucks that need gear made to last in Aussie road grime and weather. The suzi coil is a smart buy for keeping 7 core setups tidy.

• Heavy-duty Narva 7 core suzi coil cable
• Total extended length of 4.6 metres
• Includes 6 x 5 mm (3 mm²) conductor cores
• Includes 1 x 6 mm (5 mm²) higher current core
• Suits adapting heavy-duty sockets to large round sockets
• Ideal for electrical connection between truck and trailer
• Coiled construction helps prevent cable dragging on deck
• Supports standard 7 core trailer lighting and auxiliary circuits
• Designed for commercial and towing applications using 7 core wiring

Q: Can this suzi coil be used on any 7 core trailer wiring setup?

It can be used on 7 core setups that match the heavy-duty and large round socket style. This coil is made for trucks and trailers that already run 7 core circuits. The key is matching the socket style and wiring pattern on both vehicles. If your rig runs standard 7 core trailer wiring with heavy-duty or large round sockets, an auto sparky can wire this coil in to suit.

Q: What is the main purpose of the larger 6 mm (5 mm²) core?

The larger core is intended for higher current circuits within the 7 core loom. Many truck and trailer combinations need one line to handle more load than basic lighting. The 6 mm core with 5 mm² conductor area is suited to that heavier feed. Common uses include auxiliary power lines, charge feeds or higher wattage lighting circuits. This keeps current away from the smaller lighting cores.

Q: Why choose a suzi coil instead of a straight trailer cable?

A suzi coil stays compact and stretches only as needed. On long wheelbase trucks a straight cable can sag or drag across chassis components. The coiled shape on this Narva suzi coil keeps the 4.6 metre length tucked up until the truck turns. That helps reduce chafe and damage at full articulation. It also keeps the wiring tidier across the coupling area.

Q: How should the suzi coil be routed between truck and trailer?

It should be routed so the coil hangs clear of sharp edges and moving parts. Most setups hang the coil between matching sockets on the rear of the truck and the front of the trailer. The key is leaving enough slack for full lock and articulation without stretching the coil solid. Cable ties or hanger hooks can be used near the sockets to keep the ends supported and out of pinch points.

• Application: Electrical connection between trucks and trailers
• Function: Adapts heavy-duty sockets to large round sockets and vice versa
• System type: 7 core trailer wiring setups
• Suitable use: Install between towing vehicle and trailer equipped with compatible 7 core heavy-duty and large round sockets