Electric cable
Electric cables and particularly electric power cables for medium and high voltages are composed of a plurality of polymer layers extruded around the electric conductor. The electric conductor is usually coated first with an inner semiconductor layer followed by an insulating layer, then an outer semiconductor layer followed by water barrier layers and on the outside a sheath layer. Shielded cables are used in environments in which there is a risk of electrical or magnetic disturbances occurring. The shield construction, and therewith also the function of the shield, will thus depend on the environment from which the cable shall be protected, i.e. shielded, against. A shield electric cable has a core wire for transmitting electric power and signals, that is covered with a shield layer with an insulating layer therebetween, thereby preventing the core wire from being a noise source at the electric power transmission. Electrical rubber cables, are flexible electrical cables with a conductor surrounded by an insulating layer and an outer jacketing layer. Several insulated conductors may be enclosed by one jacket. Such rubber cables are usually low or medium voltage cables, i.e. they are intended for voltages up to about 10 kV. Electric cables are generally identified by using insulating sheaths with different colorings or by using codes composed of numerals or letters which are printed directly on the insulating sheaths of the cables or are associated with a supporting element which engages the cables to be tagged. Cable reels are typically used to store, transport and protect electronic transmissions cable or other electric cable. The electric cable is wound around a drum of the reel within the well of the reel, and lagging is secured to the reel to enclose the well and cover the electric cable to protect the cable.
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