Marine ship cables are conductor products for the transmission of electricity and signals on various ships. They must be highly reliable, safe, flexible and waterproof. It is also important that such cables are resistant to fire, smoke and halogens.
Classification
Features of ship cable laying depend on their type. These conductor products are usually classified according to:
- climatic component;
- design features;
- appointment;
- insulation materials.
According to the climatic component, there are cables for temperate and tropical climates. In the first case, they can be used at temperatures from -40 to +65 degrees Celsius. Cables for tropical climates are used in the range from -25 to +85 degrees Celsius.
According to their design features, cables can be with steel armor, core screening or full screening. Armored cables have a protective layer of steel wires or tapes. It increases their mechanical strength and protects them from external influences. Shielded cables have a metal layer around each core. This reduces electromagnetic interference. Fully shielded cables have a metallic layer around the entire cable. It provides complete isolation from electromagnetic fields.
By purpose, such cables are also divided into 3 types. Internet and communication cables are designed to transmit data and voice over optical or copper fibers. Patch cables are used to connect various devices and instruments on a ship. Power cables are needed to transfer electricity from power sources to consumers.
The insulation in this wiring product can be polyvinyl chloride (PVC), rubber, polyethylene (PE), polyurethane (PU), polyester (PET) or polyamide (PA ). The insulation material affects the heat, chemical, moisture and fire resistance of the cable, as well as its flexibility and durability.
Laying features
Power cables are laid along the ship's hull, in pipes or cable trays, taking into account the minimum bending radii and allowable loads. They must be protected from damage, overheating and short circuits.
Control and signal cables are laid from the control panel to actuators: valves, pumps, sensors, etc. They must be shielded from electromagnetic interference and separated from power cables.
Cables for the Internet and communications are laid from communication equipment to user devices. They must also be escaped.
