Read the text. Choose the correct answer.

The requirements for marine cables

The requirements for marine cables properties in shipbuilding are growing due to the increasing demand for low weight and high efficiency. Ship cables have to be installed in narrow spaces demanding highest cable flexibility. Furthermore, marine cables often have to be halogen free, flame retardant and self-extinguishing.

Ship cables are not allowed to enhance flame propagation. Additionally maritime wires should have a low own weight and besides correspond to different international approvals.

Cables, equipment, protective devices etc. shall be clearly marked as far as is necessary in addition to the manufacturer’s markings so that they can be identified. Marking shall also be used to the extent necessary to prevent danger.

Flexible cables with an earth conductor are required to have an earthing plug. Flexible cables without an earth conductor are required to have a plug without an earthing contact. Flexible cables for Class II equipment (double-insulated) are not required to have an earth conductor, but may have an earthing plug. Flexible cables are required to be connected in the room where the relevant equipment is used. This does not apply to equipment designed to be moved during use or for temporary use.

When cables are laid behind panels or deck-platings, these are to be easily removable. The cables are to be directly available when the panel or deck-plating is removed. However, single cables for lamps, socket-outlets and switches in dry areas may be installed behind wall panels, which are not easy to remove. The requirements that panels or deck platings, are to be “easily removable” means that the panels or deck platings have to be hinged or fixed by screws in such a way that they can be dismantled without difficulty. Such panels or deck-platings should be able to be dismantled without damaging the interior.