[Chai Jin cable tray to recommend the star product - bridge] (2) ladder to the tray unit resistance values ??in Table 2. Table 2 in units of resistance ladder tray unit resistance (3) cable trough values ??in Table 3 (4) When the cable tray installation and connection process as a whole after the trough cable tray, ladder each side (or each cable channel) of resistance: R = L (r + 1 / 3r ') where: R-- ladder cable tray side, namely (cable channel) Length total resistance (mΩ); r-- ladder side resistance per unit length (mΩ / m ) r '- direct plate fixing bolt contact resistance. [Chai Jin cable tray to recommend the star product - bridge 2, such as when combined with the power cable tray Cascade cable bridge, power cables and electronic cables should each side of the cable tray which sell directly, using the partition separating the middle. 3, weak cable combined with other low-voltage cable bridge, should be strictly enforced outer shield choose a weak system of weak cable to avoid mutual interference. Cascade cable bridge, famous bridge enterprise Chai Jin (certified), Changning cable tray cable tray provided by the Tianjin Chai Jin Limited. Chai Jin Tianjin cable bridge Limited (www.tjcjdlqj.com) is Tianjin, metal building materials leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chai Jin leader in cable tray with the staff warmly welcome all inquiries negotiations to create Chai Jin cable tray a better future.