This copper ground wire, prominently marked with green and yellow two-color，offers three core specifications of 25mm², 50mm², and 95mm². It is specifically designed for lightning protection and fault protection in power systems, belonging to industrial - grade professional equipment. Its core advantage stems from the use of high - purity electrolytic copper, which not only has excellent conductivity (conductivity ≥ 98%), ensuring that current can be quickly and low - loss import the earth when a fault or lightning strike occurs, but also has excellent corrosion resistance and oxidation resistance. It can adapt to complex environments such as outdoors, humidity, and high temperatures, significantly extending the service life and reducing maintenance costs. In terms of structural design, the ground wire adopts a multi - strand stranding process, with the diameter of a single copper wire precisely controlled within the range of 0.1 - 0.3mm. This not only ensures the overall flexibility, facilitating construction in narrow spaces or complex wiring environments, but also improves heat dissipation efficiency by increasing the conductor surface area, avoiding overheating caused by short - term large current passing through. The outer insulating sheath is made of weather - resistant PVC material, which has the characteristics of acid and alkali resistance, ultraviolet resistance, and mechanical damage prevention. It can effectively protect the internal copper conductor from external environmental erosion. At the same time, the internationally universal green and yellow dual-color marking can clearly distinguish the ground wire from other cables, reducing the risk of misoperation during construction. From the perspective of application scenarios, the 25mm² specification is suitable for grounding protection of small power distribution equipment, household circuits, and weak current systems, such as lightning protection grounding of household appliances and communication base stations; The 50mm² specification is widely used in fault grounding of medium - sized industrial equipment, factory power distribution systems, and building power main lines, and can meet the safety protection needs under medium current load; As a high - current carrying model, the 95mm² specification is mainly used in key power facilities such as high - voltage substations, large industrial plants, and power stations. It can effectively divert the huge pulse current generated by lightning strikes or the fault current during line short circuits, avoiding equipment damage or casualties. In addition, the ground wire is produced in strict accordance with the International Electrotechnical Commission (IEC) and national GB standards. Each batch of products has undergone multiple quality inspections such as conductivity testing, high - voltage resistance testing, and mechanical strength testing to ensure reliability in extreme situations. Its professional - grade positioning not only meets the safety requirements of conventional power engineering, but also can provide stable grounding protection for precision equipment in special environments. It is an indispensable key component in the safe operation of power systems, building a solid defense line for power safety in industrial production, public facilities, commercial buildings and other fields.