{"id":3536,"date":"2022-12-21T11:38:15","date_gmt":"2022-12-21T02:38:15","guid":{"rendered":"https:\/\/www.naccorporation.com\/en\/?post_type=electrical-knowledge&#038;p=3536"},"modified":"2023-04-04T11:29:31","modified_gmt":"2023-04-04T02:29:31","slug":"cable-harness-defects-cable-harness-testing-for-unstripped-error-detection","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3536","title":{"rendered":"[Cable &#038; Harness Defects] Cable Harness Testing for Unstripped Error Detection"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/NwmBPgJ2iDA\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\r\n<\/div>\r\n\r\n\r\n<h3>Causes and behavior of unstripped (misstripped) wire sheath<\/h3>\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/errors.png\"  alt=\" Unstripped is caused by human error such as technique, misunderstanding, physical condition, tool selection error, jamming of automatic crimpers, and setting error.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/crimping-unstripped-wires.png\"  alt=\"Stripping error, crimping unstripped wires\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/Crimping-over-insulation-sheath.jpg\"  alt=\"Crimping over insulation sheath may lead to conduction\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n<p>Unstripped occurs due to human error, and machine stripping errors also occur at a low rate.<\/br>\r\nEven unstripped cables may conduct depending on the terminal and the cross-sectional condition.<\/br>\r\nThe claws of a crimped terminal may penetrate the sheath.<\/br>\r\nIf the terminal and the cable are in contact at even a single point, the product will pass wiring testing, and there will be no significant difference in resistance.<\/br>\r\n\r\nHowever, it is not performing its proper function.<\/br>\r\nConduction is maintained in a static state.<\/br>\r\nBut vibration, shock, and refraction can cause unstable conduction.<\/br>\r\nThis is due to momentary disconnection, which can be conductive or non-conductive depending on the environment.<\/br>\r\nIf these are released into the field, it could be a serious accident and you will lose the trust of your customers.<\/p>\r\n\r\n<div class=\"c-spacer--s\">\r\n<h3>Example of unstripped wire sheath failure in the automotive industry<\/h3>\r\n\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/Wiring-testing-with-cable-harness-tester.jpg\"  alt=\"Conduction resistance testing with cable harness tester\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/Conduction-resistance-testing-with-cable-harness-tester.jpg\"  alt=\"Automotive wire harness failure causing drive recorder and audio failures, lamp non-lighting, and side mirror inoperability.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/Automotive-wire-harness-failure.jpg\"  alt=\"Wiring testing with cable harness tester\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n<p>There are cases in which a product has passed wiring testing and has been shipped, but the manufacturer complains that the product is defective.<\/br>\r\nThere is a possibility of momentary disconnection due to an unstripped cable<\/br>\r\n\r\nA momentary disconnection defect in the automotive harness will cause the dashboard camera and audio system to stop, and the lamps and side mirrors to malfunction.<\/br>\r\nIn the worst case, the vehicle may not be able to drive.<\/p>\r\n\r\n<\/div>\r\n<h3>Cable Harness Testing for Unstripped Error Detection<\/h3>\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/visual-inspectionand-pressure-inspection-using-a-crimp-force-monitor..png\"  alt=\"Wire sheath defects and stripping errors are detected by visual inspection, image inspection, and pressure inspection using a crimp force monitor.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/Momentary-disconnection-testing-of-the-harness-cable.png\"  alt=\"Momentary disconnection testing of the harness cable is required to confirm continuity under vibration and shock.\" width=\"280\" height=\"157.5\" padding=\"20\">\r\n<img loading=\"lazy\" src=\"\/en\/wp-content\/uploads\/2022\/12\/apply-vibration-or-shock-by-hand-hammer-vibrator..jpg\"  alt=\"When testing momentary disconnection, apply vibration or shock by hand, hammer, vibrator.\" width=\"280\" height=\"157.5\" padding=\"20\"><\/br>\r\n<\/br>\r\n\r\n\r\n\r\n<p>Examples of unstripped detection methods include visual inspection and pressure detection.<\/br>\r\nIn the final inspection of a completed cable harness, perform momentary disconnection testing with a cable harness tester.<\/br>\r\n\r\nIt determines whether continuity is actually maintained under vibration and shock conditions.<\/br>\r\n\r\nnac CORPORATION's testers are capable of momentary disconnection testing.<\/p>\r\n\r\n\r\n","protected":false},"author":19,"featured_media":3547,"menu_order":8,"template":"","meta":[],"electrical-knowledge-cat":[127,155],"electrical-knowledge-tag":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3536"}],"collection":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge"}],"about":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/types\/electrical-knowledge"}],"author":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/users\/19"}],"version-history":[{"count":1,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3536\/revisions"}],"predecessor-version":[{"id":3548,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3536\/revisions\/3548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3547"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3536"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3536"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3536"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}