The blank line also needs to be grounded. The main purpose of grounding is to ensure personal safety and the normal operation of equipment. Although a blank line (i.e. a suspended wire) does not mean that grounding is not necessary, suspended wires themselves have certain safety hazards and are easily affected by natural factors such as wind, rain, tree branches, and other obstacles, which may cause the wire to swing, break, and even cause safety accidents such as short circuits and fires.
The role and importance of grounding
Preventing electric shock: Grounding can connect the metal casing or other conductive parts of electrical equipment to the ground, forming a low impedance conductive path to ensure that current can safely flow into the ground, avoiding damage to personnel and equipment.
Reduce failure rate: Grounding can reduce the failure rate of electrical equipment and improve its operational reliability.
Suppressing electromagnetic interference: Grounding can also suppress electromagnetic interference in electrical systems and improve system stability.