The 70mm² green/yellow earth cable (stranded bare copper, 90°C PVC insulated, 100m roll, for heating/grounding) is a cable specially designed for safe grounding and high-temperature heating environments. With its excellent conductivity, high-temperature resistance, and clear identification, it plays a key role in ensuring the safety of electrical systems and grounding of high-temperature equipment.​ In terms of specification parameters, the conductor cross-sectional area of this cable is 70mm², adopting a stranded bare copper structure, which is composed of multiple strands of fine copper wires twisted together. It not only has excellent conductivity, with a maximum conductor resistance of no more than 0.268Ω/km at 20°C, which can quickly conduct current into the ground to ensure grounding safety, but also has good flexibility, facilitating bending and laying in complex installation environments. The insulation layer is made of 90°C high-temperature resistant PVC material with a thickness of about 2.0-2.5mm, which can maintain stable insulation performance in high-temperature environments. The insulation resistance is greater than 100MΩ·km at room temperature, effectively preventing leakage and short circuits. The rated voltage of the cable complies with relevant grounding specifications and is mainly used for grounding loops in low-voltage systems. Its appearance is green and yellow alternately, which is an internationally accepted grounding identifier, clearly distinguishing it from other functional cables and avoiding wiring errors. Each roll is 100 meters long, meeting the grounding wiring needs of most projects and facilitating transportation and storage.​ In terms of characteristic uses, this cable has important applications in many fields. In power systems, it can be used as a grounding branch for distribution devices, transformers, switch cabinets and other equipment, connecting the equipment shell to the grounding grid. When the equipment leaks electricity, it can quickly conduct the fault current into the ground, protecting the safety of personnel and equipment. In industrial heating equipment, such as industrial electric furnaces, drying kilns, heat treatment equipment, etc., due to the high temperature when the equipment is running, its metal shell needs reliable grounding. The high-temperature resistant insulation layer of this cable can adapt to the high-temperature environment around the equipment, ensuring that the grounding remains effective. In building electrical, it is suitable for lightning protection grounding, protective grounding and working grounding of buildings, such as connecting lightning rods, grounding electrodes with building steel bars to form a complete grounding system, enhancing the lightning protection capability of buildings. In the new energy field, such as photovoltaic power stations and wind farms, it can be used as a protective grounding cable for equipment to ensure the safe operation of power generation equipment in harsh environments. In addition, in large public places such as subways and airports, its clear green-yellow identification and reliable grounding performance can provide safety guarantees for complex electrical systems.​ In terms of materials, the conductor is made of high-purity bare copper with a purity of more than 99.9%. High-purity copper ensures excellent conductivity, which can quickly conduct fault current and reduce grounding resistance. The bare copper stranded structure gives it good mechanical strength, which can withstand a certain amount of tension and pressure and is not easy to break. The insulation layer is made of 90°C high-temperature resistant PVC material, added with heat-resistant stabilizers and flame retardants. It can not only withstand high temperatures but also has certain flame retardancy. It burns slowly when exposed to fire and can self-extinguish after leaving the fire source, improving safety. The green-yellow insulation layer uses special color masterbatches, with bright and durable colors that are not easy to fade, ensuring that the grounding function can still be clearly identified during long-term use.​ In terms of production process, the cable is made through strict procedures. First, high-purity copper rods are drawn into fine copper wires, which are annealed to enhance flexibility; then multiple strands of copper wires are twisted according to specific processes to form 70mm² conductors, ensuring uniform and tight twisting; then the extrusion process is used to wrap heat-resistant PVC material around the outer layer of the conductor, and at the same time, green-yellow color masterbatches are introduced to form a uniform insulation layer; then high-temperature aging test is carried out, placing the cable in a 90°C environment to test the performance stability of the insulation layer; then the spark test is used to detect whether the insulation layer has pinholes and other defects; finally, the qualified cables are rolled into 100-meter rolls, and appearance and performance spot checks are carried out to ensure product quality.​ In terms of general information, the packaging uses hard paper tubes or plastic reels, and the outer layer is wrapped with moisture-proof plastic film to prevent moisture and damage during transportation and storage. Avoid violent collision and exposure to the sun during transportation to prevent damage to the insulation layer. Each roll of cable is strictly inspected before shipment to ensure that the length, appearance and performance meet the standards. Manufacturers can provide samples for customers to test and confirm. In terms of after-sales service, a 1-3 year warranty period is provided. If the grounding fault is caused by product quality problems, the manufacturer will be responsible for repair or replacement. The professional technical team can provide installation guidance and suggestions for grounding resistance testing.