• 목록
• 답변
• 글쓰기
• 게시판 리스트 옵션
  • 수정
  • 삭제

There are single core, two core, three core, three and half core & four core are the five type of power cables. Single core cables are having only one core conductor itself and big sized and that would be Phase, Neutral or Earth. Between 33kv to 66kv voltage rating cables are called extra high tension cables. 1000V to 11kV rating used conductors are called high tension cables. Which is the conductor used in the power transmitting that is called power cables. Electrical cables are used to connect two or more devices, enabling the transfer of electrical signals or power from one device to the other. Power cables are used for bulk transmission of alternating and direct current power, especially using high-voltage cable. The now-congested and unstable long-distance high-voltage transmission systems that criss-cross the nation must be used for the purpose for which they were intended: to enable bulk power transfer in case of emergency, not to wheel power from one end of the country to the other so a company can import cheaper power, charge a few cents less, and beat out the competition.

This can be demonstrated by putting one end of a pair of wires in a hand drill and turning while maintaining moderate tension on the line. Towards the end of 1893 (the same year that a propeller powered trolleyboat was tested on the Erie Canal), the first electrically powered submerged flexible cable system was set up in the Bourgogne canal in France. Every cable would be operated in lengths of about 8 kilometres (5 miles) each way from the power station, the outgoing cable being used for boats going in one direction and the return cable (after crossing the canal) for those going in the other way (see illustration below). You could bend them, hide them, and maintain all the cords out of sight, yet they will certainly not be too way out of mind to be very difficult to handle. Tight lays during stranding makes the cable extensible (CBA - as in telephone handset cords).

A twisted pair has two wires of a cable twisted around each other. It broadens to fit around numerous wires and cables as well as it gathers Velcro that runs the entire length of the sleeve. The first thermoplastic used was gutta-percha (a natural latex) which was found useful for underwater cables in the 19th century. In the 19th century and early 20th century, electrical cable was often insulated using cloth, rubber or paper. Tinning was used to help removal of rubber insulation. Tinning is also used to provide lubrication between strands. Thin strands of glass or plastic form the basic composition in these types of cables. There are three types of cables are used in the domestic electrical construction areas. These cables are stranded to lower skin effects. This is known as the skin effect. Where the interfering signal has a wavelength that is long compared to the pitch of the twisted pair, alternate lengths of wires develop opposing voltages, tending to cancel the effect of the interference. This causes the voltages induced by a magnetic field between the shield and the core conductor to consist of two nearly equal magnitudes which cancel each other.

Single core conductor is only used in the high tension voltage system. These cables transmit high voltage electric current and are protected by a shield. Power cables are carrying current to the circuit. The majority of people do nowadays many thanks to the power of power as well as all that it provides us with. They clean a breeze, they protect children as well as animals, they are cost effective as well as easy to utilize. Electric cord reels are convenient and space-saving for organizing your wiring and connections. Electrical cables are extensively used in building wiring for lighting, power and control circuits permanently installed in buildings. Since all the circuit conductors required can be installed in a cable at one time, installation labor is saved compared to certain other wiring methods. It is used to define the current capacity of standard conductors (wires) in different working conditions for safe operation. It is very important to know the resistance of electric conductors when they are used in electric circuits. Table 3 also indicates the electric resistance per 1000 m and 1000 ft of these wires. Thus, the specific resistance of copper in the imperial system is 10.11 Ω.CM/ft. Copper wires in a cable may be bare, or they may be plated with a thin layer of another metal, most often tin but sometimes gold, silver or some other material.

If you beloved this article and you would like to receive additional details with regards to what is electric cable kindly take a look at our webpage.