1. The choice of cable tray 1.1 in the engineering design, cable trays shall be arranged comprehensive comparison based on economic rationality, technical feasibility, operational security, and other factors to determine the best program, but also to fully meet the construction and installation, maintenance, repair and cabling requirements. 1.2 cable tray height from ground level when the laying is not lower than in 2.5m, 1.8m following section should be added to protect the metal cover from the ground vertical laying, except electrical rooms laid in time. Cable tray laid in the mezzanine level of the troops or the road and less than 2.5m, should take measures to protect the ground. 1.3 cable tray, trunking and hangers for use in corrosive environments Deng County cable should be used in the manufacture of rigid corrosion-resistant material. Or taking anti-corrosion treatment, anti-corrosion treatment should meet the requirements of the environment and durability engineering . To require a higher resistance to corrosion or require a clean place, should use aluminum cable tray. 1.4 cable bridge in the fire safety requirements of the sector, in cable ladder Nanyang cable manufacturers, adding with a tray resistant or flame retardant properties of the plate, net material enclosed or semi-enclosed structure, and take in the bridge and brushing the surface coat hanger fire protection measures. Its overall performance should meet the requirements for fire resistance specifications or standards of countries. Fire prevention requirements in high places. Should not use aluminum cable bridge. 1.5 need to shield electromagnetic interference cable lines. Or a protective external video n to time such as outdoor sunlight, oil cables, corrosive liquids, combustible dust and other environmental requirements should be used without holes cable tray. 1.6 easy to accumulate dust place cables, cable trays should be used to cover; in outdoor public access across the road or on the bottom section of the bridge should add non-porous plate or tray. Cable maintenance requirements and methods currently used in low-voltage cable accessories more products than the main types of heat shrinkable accessory, prefabricated annex, cold shrink accessories. They are the following features: a heat-shrinkable material is generally used in the annex to polyethylene, ethylene - vinyl acetate component of a variety of materials (EVA) and ethylene-propylene rubber blend composition. These products mainly deal with electrical stress pipe stress concentration problems. That parameter control method using an electric field to alleviate the stress concentration. The main advantage is lightweight, easy to install, the performance is still good. Cheaper prices. Tube is a volume resistivity of moderate stress (1010-1012Ωocm), a large dielectric constant (20 - 25) special electrical parameters of heat shrinkable tube, forcing the use of electrical parameters of the cable insulation shield the fracture stress along evacuation into more uniform stress distribution pipe. This technique can only be used in 35kV and below cable accessories. Because heat stress tube voltage level is high and not work reliably. Its use in key technical problem: To ensure the electrical parameters of the stress pipe must meet the predetermined reference value can only work reliably. Nanyang cable manufacturers, cable, Teflon electric power provided by the Nanyang Fu Long Electric Power Engineering Company Limited. Nanyang Fu Long Electric Power Engineering Co., Ltd. (www.nyfulong.com) strong, credible, Nanyang in Henan transmission equipment and materials industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Teflon electricity into the brilliant and you work for a better future!