Technical Parameter

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  Price estimation of wires and cables

  Cost calculation of wire and cable To buy high-quality and low-cost wires and cables, we must first have a general understanding of the cost calculation of wires and cables. The wires and cables we commonly use are insulated wires, also call....

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  Breakdown test of wires and cables

  The breakdown test of the cable is to increase the voltage step by step until the insulation breakdown, and obtain the breakdown voltage value of the cable. The purpose of this type of test is to assess the safety margin between the ability....

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  Frequently asked questions about wires and cables

  1. What are the types of commonly used wires and cables according to their purpose? Answer: According to the purpose, it can be divided into bare wires, insulated wires, heat-resistant wires, shielded wires, power cables, control cables, com....

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  Calculation and installation cases of wires and cables

  The measured load current of work area 2# living variable load is 330A. The existing cable is a 120mm four-core copper core cable, and the safe current carrying capacity is 260A after checking the table. The cable will be overloaded and ther....

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  How to calculate and select the correct wires and cables

  The rated voltage of the cable is equal to or greater than the rated voltage of the network where it is located, and the maximum working voltage of the cable must not exceed 15% of its rated voltage. In addition to the use of copper core cab....

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  Harm of resonance caused by cable open circuit fault

  In severe cases, the open circuit resonance of the cable can superimpose the high frequency and the fundamental frequency resonance, which can make the overvoltage amplitude reach 2.5 times of the phase voltage. It may cause the neutral poin....

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  Aging and failure of wires and cables

  Analysis of the aging and failure causes of wires and cables Causes of aging 1. External force damage. Judging from the operation analysis in recent years, especially in cities with rapid economic development, a considerable number of cable....

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  Quality identification of wires and cables

  How to identify the pros and cons when buying wires The state has explicitly ordered the use of copper wires in newly built houses. But the same copper wire, there are also inferior copper wires, whose copper core is made of recycled copper,....

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  How to install and store wires and cables?

  If the cable is to be stored for a long time, the following considerations should be taken according to the location of the cable: 1. Under the eaves. The standard LAN cable can be used only when the cable is not directly exposed to sunlight....

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  Installation safety and protection of wires and cables

  1. When the cables are installed crossing each other, the high-voltage cables should be under the low-voltage cables. If one of the cables is protected by a pipe or separated by a partition within 1m before and after the intersection, the mi....

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