The 30mm² THW green copper cable is a high-performance power transmission cable with a rated voltage of 600V, specifically designed for complex environments such as industrial, construction, and outdoor settings. With its excellent current-carrying capacity and weather resistance, it has become an ideal choice for power supply of high-power equipment. "THW" indicates that its insulation layer is made of thermoplastic polymer (usually PVC), which has temperature and moisture resistance properties, while the green outer sheath complies with international general standards for ground wire or specific circuit identification, facilitating identification and differentiation during installation.​ In terms of specification parameters, the 30mm² cross-sectional size endows it with strong current-carrying capacity. At an ambient temperature of 30℃, its current-carrying capacity can reach 100-130A, which can meet the continuous power supply needs of high-power equipment such as large industrial motors, central air conditioning hosts, and high-pressure water pumps. The rated voltage of 600V is applicable to medium and low-voltage distribution systems, and can be widely used in building main distribution, industrial production line main circuits, and outdoor temporary large-scale equipment power supply. In addition, the insulation resistance of the cable is ≥100MΩ·km, and it passes the 2500V voltage withstand test (no breakdown for 1 minute), ensuring insulation stability under high load and effectively preventing the risk of electric leakage and short circuit.​ In terms of material and structure, the conductor is made of high-purity electrolytic copper with a purity of more than 99.95%. The single-strand or multi-strand stranded design takes both conductive efficiency and mechanical strength into account. The multi-strand stranded structure gives it a certain degree of flexibility, facilitating bending and laying in complex wiring environments, while reducing conductor fatigue caused by vibration. The insulation layer is made of temperature-resistant PVC material, with an operating temperature range of -15℃ to 90℃, which can work stably in humid, dusty, and even slightly oily environments. Moreover, its flame retardant grade reaches UL94 V-0 standard, which can self-extinguish quickly when exposed to open fire, reducing the risk of fire spread. The green outer sheath is not only a functional identifier, but its material also has UV aging resistance, extending the service life in outdoor use.​ In terms of characteristic uses, the cable is often used in industrial fields as the main power line in factory workshops to connect large stamping machines, injection molding machines and other equipment; in the construction industry, it can be used as the main incoming cable of buildings or emergency power supply circuits to ensure the power supply of key equipment such as elevators and fire pumps; in outdoor scenarios, it is suitable for temporary main cables in open-air stages and large exhibitions, or power supply lines for water pumps in agricultural irrigation systems. The green identifier enables it to be clearly used as a ground wire in the three-phase five-wire system, or as a distinguishing identifier in specific circuits, simplifying wiring management and fault 排查.​ In the production process, the cable undergoes precision wire drawing, multi-layer stranding, high-temperature extrusion and other processes. The copper material is drawn multiple times to ensure cross-sectional accuracy. During stranding, the concentric layering process is adopted to improve structural stability. During insulation extrusion, temperature and pressure are strictly controlled to ensure uniform thickness (usually 1.2-1.8mm) and no bubbles. Each batch of products must pass more than 30 tests such as conductor resistance, insulation temperature resistance, and bending resistance, complying with international standards such as ANSI/UL 44, to ensure reliability in harsh environments.​ During installation, attention should be paid to connecting with matching terminals and connectors to avoid overvoltage and overcurrent. For fixed laying, methods such as cable trays, pipe threading or direct burial can be adopted. For outdoor use, waterproof sealing treatment must be done well. With strong current-carrying capacity, durable materials and clear identification functions, the 30mm² THW green copper cable provides a safe and efficient power transmission solution for medium and high voltage, high-power scenarios.

600 Volt THW THW-2 12AWG 4AWG 90C PVC Insulation Green Copper Wire Cable Summary​ The 600 Volt THW and THW-2 copper wire cables, available in 12AWG and 4AWG with 90°C-rated PVC insulation and green coloring, are engineered for safe and efficient electrical grounding and power distribution in residential, commercial, and industrial systems. The green insulation universally signifies grounding or bonding applications, ensuring clear identification and compliance with safety standards.​ Crafted with high-purity stranded copper conductors, these cables deliver low resistance and efficient current transmission, critical for grounding circuits that redirect fault currents. The THW and THW-2 designations indicate thermoplastic insulation resistant to heat, moisture, and chemicals—THW-2 enhances durability for more demanding environments. With a 90°C temperature rating, they withstand high heat from continuous operation or ambient conditions, making them suitable for HVAC systems, industrial machinery, and outdoor installations.​ The 12AWG variant handles moderate grounding loads in lighting and small appliance circuits, while 4AWG supports heavy-duty applications like main panel grounding and industrial equipment. Both sizes comply with international standards (e.g., NEC), featuring flame-retardant PVC for added safety. Their flexibility simplifies installation in conduits or tight spaces, making them a reliable choice for ensuring electrical system integrity.