How to quickly identify whether the workmanship of high temperature resistant THHN cable is inferior

There are 6 ways to quickly identify the quality of high temperature resistant THHN cable

1, see the color of copper conductor, general provisions of high temperature resistant THHN cable conductor copper wire must use pure copper oxygen free copper (copper industry known as copper), because the copper content of 99%, high purity, soft color, high oxygen content.

2. Wipe the copper wire with frosted white paper. If the high temperature resistant THHN cable is not qualified, there are more impurities in the copper wire, and the welding with copper is not stable, and it will leave marks (black) on the white paper after wiping.

3, bending copper wire conductor back and forth, pure copper wire soft, good tensile strength, not easy to break.

4, observe the surface of copper high temperature resistant THHN cable, copper conductor surface should not have triangles or burrs, cracks, kinks, folds, inclusions, skin spots, pits, mechanical damage, stains, defects;

5, to measure whether the copper wire is square, no voltage THHN cable is easy to detect. Copper wire diameters were measured directly with calipers and compared according to the THHN cable data sheet. However, there are many shrunk THHN cables on the market, which can be compared with the actual unit weight of THHN cable according to the unit weight of THHN cable or standard THHN cable parameter table;

6, check the insulation of high temperature resistant THHN cable. Whether the jacket surface is smooth and round, whether the luster is uniform, whether there are visible bubbles, burns, etc. The thickness should be uniform, without bias core, mechanical damage and flattening phenomenon, each layer of material should not stick, fully filled, cable roundness, bending cable is not easy to appear white mark.

All in all, high quality high temperature resistant THHN cables, conductors and insulation are of fine workmanship, while inferior products are much worse in this respect, especially conductors. For our safety, we should choose regular manufacturers to buy THHN cables.

Well, the above is about the introduction of "how to quickly identify the quality of high temperature resistant THHN cable", I hope to help you! It is recommended to continue to pay attention to Ruiyang Cable for more information about wire and cable.