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How to visually identify the quality of wires and cables
Category： Company News
2023-02-28 11:21
It is not easy to judge the quality of wires and cables intuitively. Because some characteristics of the cable can not be known from the observation of the cable. Generally speaking, the quality of high-temperature resistant special wires and cables should be judged from the following aspects.
1. Conductor
(1) The surface shall be round and smooth, and the coating shall be continuous and uniform.
(2) The conductor surface shall be free of defects such as triangle, burr, crack, kink, fold, inclusion, scar, pitting, mechanical damage, corrosion spot, etc.
(3) The color shall be uniform and bright without excessive oxidation trace.
(4) The conductor section size shall be sufficient and square.
2. Insulation and sheath
(1) The surface shall be smooth and round, with uniform luster, and shall be free of visible bumps, bubbles, scorched objects, etc.
(2) The thickness of insulation (sheath) shall be uniform without core deviation.
(3) No mechanical damage and flattening.
(4) There shall be no adhesion between layers of materials.
3. Others
(1) The metal shielding layer shall be continuous, overlapped and tightly wrapped without sharp corners, curling, leakage and other phenomena.
(2) The cabling pitch is appropriate and uniform.
(3) The filling is full and the cable is round.
(4) Wrapping shall be overlapped without curling and omission.
(5) The cable shape shall be round without flattening, snake-shaped bending and other phenomena.
(6) There should be no traces of moisture inside the cable.
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