Cable Popular Science Series--What is the Difference between Overhead Wire and Underground Cable?

First, the overhead wires and underground cables function differently.  

Overhead wire is main used to transmit high voltage electrical engery. 

It' s often used to  transmit electrical energy to the tram and train.

And also it can be used to provide energy to the launch pad. 

Overhead wire often appears in remote areas.

Underground cables is main used to city. 

Because, urban land is becoming more and more scarce, and high- rise buildings in the city are emerging one after another.

Therefore, overhead lines can not be built in the cities. 

Only underground cables can be used. 

Secondly, the overhead wires and underground cables have its own advantages and disadvantages.

Overhead wires 

 Advantages 

⭐Price cheap

⭐Easy to install

⭐Transfer more current

⭐Easy to troubleshoot

⭐Long transmission distance

 Disadvantages

⭐High safety hazard

⭐Easy to bad

Underground cables

 Advantages

⭐Less space occupied

⭐High safety factor

⭐Transmission stability

⭐Not easy to break down

 Disadvantages

⭐Expensive

⭐Difficult to install

⭐Difficult to troubleshoot

⭐Not friendly to high voltage transmission

Conclusion

Overhead wires and underground cables have its own characteristic. 

The overhead wires are often often used to transmit high-power current, and its mainly in remote areas. 

The underground cables are often used to build urban power grid. But its price are expensive.

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