[Chai Jin cable tray to recommend the star product - the bridge] in accordance with the relevant provisions of the grounding specifications, galvanized cable tray good grounding. (1) Each of galvanized cable tray plate bolts directly contact resistance should be less than 0.005Ω, this time as a cable tray grounding line (dusting cable trays are not suitable for grounding line), the value of each resistor type cable tray press calculated: r = ρ · L / S where: ρ = 15 × 10Ω-6 / cm (20 ℃); L = length calculated according to 100mm; S = cross-sectional area cm2. [Chai Jin cable tray to recommend the star product - the bridge to determine the width of the bridge]: According to the number of cable laying pitch, diameter of the cable and the cable to determine the length of cable tray models, specifications, supporting arm length, pillars, spacing tray cable bridge, the bridge width and number of layers. (4) to determine the installation: Depending on the setting conditions to determine the place of a fixed bridge cable tray fire way to select suspended, vertical sidewalls or hybrid type trough cable tray, fittings and fasteners are generally supporting supply, in addition, the bridge structure is selected according to the corresponding folding cover. (5) draw cable tray level, sections, local site should be drawn map, list of materials. Cable tray factory, famous bridge brand Chai Jin (certified), Guizhou 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.