Metal Conductors: Testing the purity, electrical conductivity, and tensile strength of metal conductors such as copper or aluminum. Insulation Materials: Checking the insulation resistance, heat resistance, and aging resistance of insulation materials to ensure that the cables can maintain excellent performance over long-term use.

Dimensional Structure: Measuring the outer diameter, conductor diameter, insulation thickness, and other dimensions of the cable to ensure compliance with design requirements and industry standards. Eccentricity: Inspecting the concentricity of the cable to ensure uniform distribution of the conductor and insulation layer, avoiding excessively high local electric field strength.

Voltage Test: Applying high voltage to the cable to check if it can withstand the design voltage without breakdown or flashover. Insulation Resistance: Measuring the insulation resistance of the cable to ensure good insulation performance under normal operating conditions.

Testing Tensile Strength: Testing the cable's ability to withstand tension to ensure it does not easily break when subjected to external forces. Bending Performance: Checking the cable's performance under bending conditions to ensure it is not easily damaged during installation and use.

Heat Resistance Test: Placing the cable in a high-temperature environment to check if the insulation material softens, deforms, or loses insulation performance. Flame Retardant Performance: Testing the cable's flame spread rate and smoke density, to ensure it has certain flame retardant properties in case of fire.

Testing the content of heavy metals, halogens, and other harmful substances in the cable to ensure compliance with environmental regulations.