This article mainly introduces the design of power cable from the selection of cable type, laying mode and cable arrangement.

This article mainly introduces the protection of heat shrinkable sleeve and cable joint.

This article mainly describes the principle of the lightning rod and the different shapes of the lightning rod.

This article mainly introduces network lightning rods.

This article mainly describes the comparison between conventional lightning rods and pre discharge lightning rods.

This is a passage mainly talking about whether it is 100% safe after installing a lightning rod.

This is a passage mainly talking about that lightning rod actually trigger lightning to the ground.

This article mainly describes bimetal material. Do you know the bimetal material?

This article mainly introduces the aging of insulating materials and how to prevent damage to insulating materials.

This article mainly introduces the classification of insulating material.