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How can we use Twin&Earth Cable?

Twin and earth (often written "T&E" and sometimes "T and E") cable is a type of 300/500V flat sheathed electricity cable, containing two insulated current-carrying conductors and and a Circuit Protective Conductor (CPC = PE = Earth). In Australia and New Zealand this type of cable is referred to as 'Flat TPS' (Thermo-plastic sheathed), as well as "Twin and Earth" or "Twin with Earth". It is commonly used for fixed wiring in domestic and commercial premises. It is not intended to be used where it is subject to regular movement or sunlight, because the sheathing is affected by ultraviolet radiation.. It is suitable for laying in conduit or trunking where mechanical protection is required. Twin and Earth cable is a general fixed wiring and lighting cable, containing three conductors.   Minimum bending radius: Diameter up to 10mm - 3 x overall diameter Diameter 10mm to 25mm - 4 x overall diameter (Based upon the larger dimensions)   The disadvantages of twin and earth cable? It is not suitable for overhead catenary use. Twin and Earth cable is normally made with PVC sheathing and insulation, which has an almost indefinite life in the right conditions. However UV light will cause it to fail, so Twin and Earth is not suitable for use outdoors.It can also be made with low smoke zero halogen (LSZH) outer sheathing   Zhenglan Cable Technology Co., Ltd is professional manufacturer of various building wire, electrical cable, twin earth cable. Please feel free to send us your needs for a quote.

2024

04/02

Which cable products will have high market demand in 2024?(2)

New energy vehicles New energy vehicle cables can be divided into in-car cables, charging pile cables and on-board charging cables according to different application scenarios. The rapid development of new energy electric vehicles has provided good market opportunities for its supporting cable industry. As vehicle manufacturers increase their investment in the field of new energy vehicles, vehicle electrification has become a general trend, and new energy vehicle cables will also usher in new growth points. It is expected that the size of my country's automotive cable market will reach 18.06 billion yuan in 2025. Whether from the perspective of industrial transformation or energy strategy, the prospects of new energy automobile cables are very broad. In the next five years, the field of new energy automobile cables will usher in huge development space. Marine construction China's submarine cable industry has shown a fluctuating upward trend in recent years. In 2020, driven by the "rush to install" offshore wind power, the size of the submarine cable market increased significantly by 12.64% year-on-year, reaching approximately 13.4 billion yuan, reaching its peak in recent years. Based on the future demand for offshore wind power, international communication network upgrades, and offshore oil platform development in multiple application fields, China's submarine cable market is expected to reach 20 billion yuan in 2027, with a compound annual growth rate of approximately 6%. Special equipment At present, industries such as shipbuilding, rail transportation, clean energy, aerospace, petrochemicals, and new energy vehicles all require the use of a large number of special cables. With the advancement of science and technology, the transformation and upgrading of traditional industries, and the vigorous development of strategic emerging industries and high-end manufacturing, my country's economy and society are further developing towards safety, environmental protection, low-carbon energy conservation, informatization, and intelligence. The construction and modernization of national smart grids Urban construction, large-scale transformation of urban and rural power grids, and new energy power station construction have put forward higher requirements for the application of wires and cables, which also provide new development opportunities for the development of special wires and cables.

2024

03/11

Which cable products will have high market demand in 2024?(1)

The wire and cable market is a key infrastructure market. With economic development and technological advancement, the demand for wire and cable continues to increase. In the next few years, including 2024, some cable markets will develop significantly, and some cable products will usher in broad market demand. Some people believe that markets are currently relatively stable and will continue to improve in the future, such as the following markets: Power grid construction my country's power grid construction is still in the development stage. The higher the voltage level, the more conducive to long-distance power transmission. In the future, large-scale cross-regional power grid construction in China will require long-distance power transmission. Currently, judging from the construction planning of high-voltage and ultra-high-voltage lines, supporting cables The demand is on the rise. According to the State Grid's plan, investment will increase to 520 billion yuan in 2023, a year-on-year increase of 4%. Power grid investment and new infrastructure are the driving force for the development of the cable market. Photovoltaic/energy storage/hydrogen energy market The energy sector is an important area of the wire and cable market. With the continuous development of my country's photovoltaic industry, my country's photovoltaic cable industry will still be in a stage of rapid development. It is expected that the size of my country's photovoltaic cable market will reach 18.56 billion yuan in 2023. In recent years, in order to implement the country's strategic deployment of "dual carbon" goals and promote the green and low-carbon transformation of energy, the Chinese government has introduced a series of policies and measures. In the next few years, new energy industries such as photovoltaics, wind power, and energy storage will maintain rapid growth, and the rapid development of their industries will promote the development of photovoltaic cable companies.  

2024

02/26

Thirty cable common problem knowledge popularization(5)

23. Where are the inner shielding layer and outer shielding layer of power cables located? What materials are used? What does it do? Answer: In order to have better contact between the insulation layer and the cable conductor and eliminate the increase in electric field intensity on the conductor surface caused by the roughness of the conductor surface, the conductor surface is generally covered with an inner shielding layer of metallized paper or semiconductor paper tape. In order to ensure better contact between the insulation layer and the metal sheath, an outer shielding layer is generally wrapped around the insulation layer. The outer screen layer is made of the same material as the inner screen layer, and sometimes it is also bound with copper tape or braided copper wire tape.   24. What should we pay attention to during the transportation, loading and unloading of cables? Answer: (1) During transportation, loading and unloading, cables and cable drums should not be damaged. It is strictly forbidden to push cable drums directly off the vehicle. Cables should generally not be transported or stored flat. (2) Before transporting or rolling the cable drum, it must be ensured that the cable drum is firm and the cable is wound tightly. The oil pipe between the oil-filled cable and the pressure oil tank should be fixed and not damaged. The pressure oil tank should be secure and the pressure indication should meet the requirements. 25. What aspects should be considered when selecting the cross-section of power cables? Answer: The following aspects should be considered: (1) The long-term operating current allowed by the cable; (2) Thermal stability in the event of short circuit; (3) The voltage drop on the line cannot exceed the allowable working range. 26. What are the advantages of power cables compared with overhead lines? Answer: (1) Reliable operation. Because it is installed in hidden places such as underground, it is less damaged by external forces and has fewer chances of failure. The power supply is safe and will not cause harm to people; (2) The maintenance workload is small and frequent inspections are not required; (3) No need to erect poles and towers; (4) Helps improve power factor.   27. What measures are taken to prevent cable fire? Answer: (1) Use flame-retardant cables; (2) Use fireproof cable brackets; (3) Use fire retardant coatings; (4) Fire partition walls and fire baffles should be installed at cable tunnels, mezzanine exits, etc.; (5) Overhead cables should avoid oil pipelines and explosion-proof doors. Otherwise, local pipe penetration or heat insulation and fire prevention measures should be taken.   28. What is a cable failure? How many common types are there? Answer: Cable failure refers to the failure of insulation breakdown of the cable during preventive testing or the failure of the cable line to cause a power outage due to insulation breakdown, wire burnout, etc. during operation. Common faults include ground faults, short circuit faults, disconnection faults, flashover faults and mixed faults.   29. According to the "Regulations on Safety in Electrical Industry", what are the conditions that electrical workers must meet? Answer: The following conditions must be met: (1) Healthy as determined by a doctor, with no illness that would hinder work; (2) Have necessary electrical knowledge, master relevant procedures, professional techniques and safe operation techniques according to their duties and nature of work, and pass the examination; (3) Be proficient in first aid methods for electric shock.   30. Where are the inner shielding layer and outer shielding layer of power cables located? What materials are used? What does it do? Answer: In order to have better contact between the insulation layer and the cable conductor and eliminate the increase in electric field intensity on the conductor surface caused by the roughness of the conductor surface, the conductor surface is generally covered with an inner shielding layer of metallized paper or semiconductor paper tape. In order to ensure better contact between the insulation layer and the metal sheath, an outer shielding layer is generally wrapped around the insulation layer. The outer screen layer is made of the same material as the inner screen layer, and sometimes it is also bound with copper tape or braided copper wire tape.

2023

12/11

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