Raw Material Quality Control

Copper Wire Rod: Oxygen-free copper rod, given by round clean smooth surface, no any burrs,crack, visible mechanical damage and oxidation discoloration. Diameter error and Volume resistivity at 20 ℃ can be acceptable.

Aluminum Rod: L4/L9 Aluminum rod, given by round clean smooth surface, no any burrs,crack, greasy dirt and visible mechanical damage. Diameter error and Volume resistivity at 20 ℃ can be acceptable.

XPLE Granule and PVC(normal or flame-retardant) For Sheath and Insulation: Clear visual gives even color granule with no impurities. Tensile strength, elongation at break, and volume resistivity all meet standards.

Armored Tape: Steel tape/steel wire, Thickness and wideness error must be reasonable, gives clean smooth non-defective surface.  

PYJD/PYJJ/PYJBJ/PSD: Gives even black color granule, no powder left, shape like one piece. Tensile strength and elongation at break must be acceptable.

Conductor Test: Diameter measurement by micrometer, and conductor resistance test by lab device.

Insulation Test: Thickness error less than 0.1mm. cross section visually gives an uniform and flat cut with even color. Eccentricity of insulation must be acceptable.

Armored Tape and Non-metal layer Test: Thickness measurement by micrometer, Error rate must be acceptable

Electrical Laboratory Test: 4 hours voltage test, conductor resistance test and Partial Discharge Test.

Combustion Laboratory Test: Thermal elongation test, and test for flame retardancy and smoke.

Printed Mark: Print job must be clean and rub-proof.