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What Kind Of Testing Needs To Be Done When Accepting THHN wires?

Published by admin October 27,2021

THHN wires are cables are usually used in residential buildings.Its quality is directly related to our electricity safety. If the quality of wires are not good. In the actual electricity use process, it will be damaged due to the current passing through and the temperature is too high. And it may cause the danger of electric shock, even cause fire, and endanger our lives. Therefore, you should check when you accept cables.  

What is the specific process?


1. The cable should have the product quality inspection report, the original THHN wires certifications, and other materials issued by the accreditation body. Specifications and models should meet the requirements of the order.


2. The surface of the conductor should be bright and free of defects such as broken wires, loose strands, jumpers, crushing, burrs, and others. In addition, there is a layer of nylon sheath on surface of THHN wire. Air bubbles are easily generated on the surface that should be careful. The surface of the cable should be smooth and flat, with uniform color, and there should be no defects such as curling, burrs, and missing packages.


3. The standard stipulates that the length error shall not exceed 0.5% of the total length, and length shortage is strictly prohibited. If there is a code on the surface of THHN wires, check whether its name, specification, and model are consistent with the order requirements.


JZD wire & cable manufacturer provides THHN wire, solar cable, and others, welcome to contact us to get more.