Model and Specification Table of Three-Phase Four Wire Cable Abstract: The model and specification table of three-phase four wire cable is an essential tool for engineers in the cable industry. It provides detailed information about the different types of cables available, their specifications, and their applications. This article will explore the model and specification table from four aspects: cable type, conductor material, insulation material, and voltage rating. 1. Cable Type Three-phase four wire cables come in various types to suit different applications. The most common types include PVC insulated cables, XLPE insulated cables, armored cables, and non-armored cables. PVC Insulated Cables: These cables have a polyvinyl chloride (PVC) insulation layer that provides excellent electrical properties at a lower cost. They are suitable for indoor installations where mechanical protection is not required. XLPE Insulated Cables: Cross-linked polyethylene (XLPE) insulated cables offer better thermal stability and resistance to moisture compared to PVC insulated ones. They are commonly used for outdoor installations or areas with high humidity levels. Armored Cables: Armored three-phase four wire cables have an additional layer of steel or aluminum armor for enhanced mechanical protection against external forces such as impact or crushing. They are ideal for underground or direct burial applications where extra durability is needed. Non-Armored Cables: Non-armored three-phase four wire cables do not have any additional protective layers but still provide reliable electrical performance. They are often used in above-ground installations where there is minimal risk of physical damage. 2. Conductor Material The conductor material plays a crucial role in determining the cable's electrical conductivity and overall performance. Copper Conductors: Copper conductors offer excellent conductivity due to their low resistivity properties. These conductors can handle higher current loads without significant power loss but tend to be more expensive than other options. Aluminum Conductors: Aluminum conductors are lighter than copper conductors but have slightly higher resistivity values which result in slightly lower conductivity levels compared to copper conductors. Copper Clad Aluminum (CCA) Conductors: CCA conductors combine the benefits of both copper and aluminum by having an aluminum core coated with a thin layer of copper on its surface. This design allows them to achieve good conductivity while reducing costs by using less copper material. 3、Insulation Material The insulation material used in three-phase four wire cables serves as a barrier between the conductor(s) inside the cable and its surroundings. Polyvinyl Chloride (PVC): PVC insulation offers good electrical properties at a relatively low cost while providing adequate resistance against moisture ingress. Cross-Linked Polyethylene (XLPE): XLPE insulation has superior thermal stability compared to PVC insulation while maintaining excellent electrical characteristics even under high operating temperatures. Ethylene Propylene Rubber (EPR): EPR insulation exhibits exceptional flexibility over wide temperature ranges along with good resistance against abrasion or tearing making it suitable for harsh environments. 4、Voltage Rating The voltage rating specifies the maximum voltage level that a particular type of three-phase four wire cable can safely handle without experiencing breakdowns or failures during operation. Low Voltage Cables (<1kv): these>1kV - <35kv):>35kV):High-voltage-rated cabling systems carry electricity across long distances.These overhead transmission lines require sturdy construction materials such as aluminium/steel reinforced cores along with heavy-duty insulating materials like XLPE/EPR polymers. In conclusion,the model