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Wire and cable parameters

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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Wire and cable manufacturing process

Wire and cable manufacturing process The manufacturing of wires and cables is completely different from the production of most electromechanical products. Electromechanical products usually adopt the assembly of other parts into parts, and t....
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Types and applications of cables

Cable classification: flame-retardant rubber sheathed cables, nuclear-grade cables, bare wires and bare conductor products, power cables, communication cables and optical fibers, electromagnetic wires (winding wires), flexible fire-resistant....
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The meaning of the cable model code

Common codes for cables The use code of the cable-not marked as power cable, K- (control cable), P- (signal cable); Conductor material code-not marked as copper (can also be marked as CU), L- (aluminum); Code -Q- inner sheath (lead sheath),....
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