{"id":3068,"date":"2020-11-29T15:00:00","date_gmt":"2020-11-29T06:00:00","guid":{"rendered":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/%e6%8a%b5%e6%8a%97%e8%a9%a6%e9%a8%93%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f"},"modified":"2022-09-28T14:45:49","modified_gmt":"2022-09-28T05:45:49","slug":"%e6%8a%b5%e6%8a%97%e8%a9%a6%e9%a8%93%e3%81%a8%e3%81%af%e4%bd%95%e3%81%a7%e3%81%99%e3%81%8b%ef%bc%9f","status":"publish","type":"electrical-knowledge","link":"https:\/\/www.naccorporation.com\/en\/learning-center\/electrical-knowledge\/3068","title":{"rendered":"What is conduction resistance testing?"},"content":{"rendered":"<div class=\"c-movie\">\r\n<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/0O-Eoy5XxHA\" 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<p class=\"c-textBig\">The conduction resistance test is to measure the conductor resistance between terminals of a wire harness and to judge whether it is within the set resistance threshold.\r\nIt follows Ohm's law R = V \/ I.<\/p>\r\n<\/br>\r\n<\/br>\r\n<hr class=\"c-hr\" \/>\r\n<div class=\"c-spacer--s\">\r\n<h4>Resistance Measurement Method<\/h4>\r\n<p>NAC CORPORATION wire harness testers are available in two methods: 2-wire resistance testing and 4-wire low-resistance testing.<\/p>\r\n<\/Br>\r\n<h5>2-wire resistance testing method<\/h5>\r\n<p>This is a simple and common resistance measurement method. It measures the resistance of test targets and jigs connected between the testing terminals of a harness tester.<\/p>\r\n<\/Br>\r\n<img src=\"https:\/\/www.naccorporation.com\/\/wp-content\/uploads\/2020\/02\/082b8b07f61f83124dd4bc4a5f2e52b7.jpg\" alt=\"\u30cf\u30fc\u30cd\u30b9\u306e2\u7dda\u5f0f\u62b5\u6297\u8a66\u9a13\u63a5\u7d9a\" class=\"alignnone size-full wp-image-2265\" \/><\/Br>\r\n<\/Br>\r\n<p>It includes the contact resistance of connectors and some internal resistance of the tester.<\/p>\r\n<\/Br>\r\n<\/Br>\r\n<h5>4-wire low-resistance testing method<\/h5>\r\n<p>This connection is known as the Kelvin connection or the 4-terminal method.Four testing terminals are applied to one cable (one circuit) to measure its resistance.<\/p>\r\n<\/Br>\r\n<img src=\"https:\/\/www.naccorporation.com\/\/wp-content\/uploads\/2020\/02\/eaf2f3ac2b4aa80799e2aa59ee2924b4.jpg\" alt=\"\u30cf\u30fc\u30cd\u30b9\u306e4\u7dda\u5f0f\u30b1\u30eb\u30d3\u30f3\u63a5\u7d9a\" class=\"alignnone size-full wp-image-2264\" \/><\/Br>\r\n<\/Br>\r\n<p>It does not include the resistance of jig cables, the contact resistance of connectors, or the internal resistance of testers. \r\nTherefore, the resistance of a pure test target can be measured with high accuracy.<\/p>\r\n<\/Br>\r\n<\/Br>\r\n<\/Br>\r\n<h4>Test Current during Conduction Resistance Testing<\/h4>\r\n<p>The test current is direct current. Resistance measurement is performed at the optimum current for the resistance of the test target.<\/p>\r\n<\/Br>\r\n<\/hr>\r\n<\/div>\r\n<a class=\"c-btn c-btn--l\" href=\"en\/inspection\/resistance-test\">Click here for cable harness testers for conduction resistance testing<\/a>\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\n","protected":false},"author":1,"featured_media":3069,"menu_order":11,"template":"","meta":[],"electrical-knowledge-cat":[127],"electrical-knowledge-tag":[128],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3068"}],"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\/1"}],"version-history":[{"count":0,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge\/3068\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media\/3069"}],"wp:attachment":[{"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/media?parent=3068"}],"wp:term":[{"taxonomy":"electrical-knowledge-cat","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-cat?post=3068"},{"taxonomy":"electrical-knowledge-tag","embeddable":true,"href":"https:\/\/www.naccorporation.com\/en\/wp-json\/wp\/v2\/electrical-knowledge-tag?post=3068"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}