Marine 3-Core Cables (Tripolar, Grey) with PVC Insulation 1.5–4 mm²

This tripolar marine cable contains three separate copper conductors within a single rugged insulation, making it suitable for more complex circuits and installations on the boat. It’s often used where an extra wire is required – for example, providing positive, negative, and a control/signal line in DC setups, or wiring onboard AC circuits (phase, neutral, earth for 230V AC). The conductors are flexible multi-strand copper, ensuring a stable electrical connection and allowing routing through tight spaces without risk of breakage. The overall insulation is grey, made of a special PVC/nylon that resists UV radiation, seawater, and petroleum products. The cable can achieve a water-resistant (IP-rated) seal when properly installed – female deck connectors come with a gasket and cap to protect the inlet when the male plug is not inserted. Each core’s current capacity ranges roughly from ~3–5 A (for 1.5 mm²) up to ~20–30 A (for 4 mm²), depending on the use, making this cable a versatile solution for signal lines as well as power lines on board.

Applications:

• Navigation lights & instruments: Allows three-core wiring for masthead or tri-color lights, anchor lights, or other combined lamps where one cable can carry positive, negative, and control (e.g. synchronization or an additional circuit). Also useful for running multiple conductors to instrument clusters.
• Pumps with float switches: Ideal for connecting bilge pumps with automatic float switches – the three-core cable can carry the positive feed, the return (ground), and the float switch signal all in one run for easier installation and maintenance.
• Onboard 230V AC supply: Suitable for running limited-power AC circuits (e.g. from a shore power inlet to an outlet or small appliance) with the three required cores (live, neutral, earth). Note: Ensure the chosen cross-section (at least 2.5 or 4 mm²) matches the current draw and safety standards for AC installations on boats.
• Other uses: Intercom systems, sensors and transducers that require three-wire cables (such as some depth-speed-temperature transducers or multi-function displays) – the tripolar cable provides a tidy, robust connection with all needed conductors in one jacket.

Recommended cross-sections:

• 1.5 mm² (3×1.5 mm²): Suitable for low-power AC circuits (up to ~6–10 A) or DC circuits with three conductors – for example, small nav lights, sensors, indicator panels where the third wire might power an indicator lamp. Often used for wiring panel switches that have an internal light (where the third conductor is for the light).
• 2.5 mm² (3×2.5 mm²): For moderate loads – carrying 230V AC to outlets or devices with modest consumption (up to ~16 A), or for DC applications like distributing power to multiple devices along one cable. A good choice for mid-sized yachts’ general onboard wiring where a three-core format simplifies the run.
• 4 mm² (3×4 mm²): The largest size – used for main AC lines on smaller boats (up to ~20–25 A), such as connecting from a shore power inlet to a distribution panel, or for DC trunk lines where a triple-conductor setup is advantageous (for example, positive, negative, and ignition/control line for a generator or other equipment).

Note: The female deck connector (code 01401-4) is a plastic 4-pin panel-mount socket with screw terminals and a cap. A matching 4-pole male plug is required to complete the connection (usually sold separately). When the cap is closed, the connector is shielded from sprays and rain (splash-proof design). Always follow proper electrical safety practices when handling 230V systems on board – this cable is intended for low to medium loads and is not a substitute for heavy-duty cables required for high-power mains.