For 21 years, Qinda Wire has paid great attention to the quality tests, not only our products but also raw materials, cannot put into usage before a series of tests, which include:

Raw Material:
We choose top-level oxygen free copper as the raw material of our copper core, which can exclude the possibility of oxidation and even fire.

Resistivity Test:
We make the resistivity test as standards to ensure lower resistivity and higher conductivity.

Eccentricity Test:
We can guarantee the uniformity of thickness of our cable's insulating layer and its safety. Uneven layer will lead to electric leakage and what's worse breakdown.

The insulating layer of Qinda Wire, after resistance test and high voltage test, can keep intact on the condition of high voltage and never crack. What's more, it can prevent rat's biting.

Tests:
Tensile Test: focus on the tensile strength and elongation of the wire

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Resistance Test: focus on the resistance of the conductor

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Appearance Test: focus on the thickness of the coat and its core shift

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Resistance & Voltage Test: focus on the resistance and withstand voltage of the insulating layer

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Conductor's Ductility Test: focus on the ductility of copper core