1, for surface of the ground surface should be painted black. As a result of the design requirements of the building, should be applied to other colors, it should be coated with a width of 15 mm each two black bands at the junction of Beijing distribution room and branches, and its pitch is 150 mm. Neutral grounding network connected to the ground conductor Ming set, should be painted purple with black stripes. 2, the grounding line towards the entrance of the building, the general should be marked with a black mark "." Maintenance at a temporary ground at the Guangzhou distribution room, white paint should be brushed after the standard black mark "." 3, during maintenance work, the need to place temporary grounding (such as distribution interval, the bus segment at the lead room, etc.) should be introduced into the ground lines Shandong power distribution room, and there exclusively for the temporary grounding wire used to connect ground plate and bolts. 4, connect the ground wire should be welded, welding must be strong without Weld. Electrical equipment connected to the grounding line applications bolted; grounding wire can not be used when non-ferrous metal welding, bolt connection is available. Bolted contact surfaces should be required, as a surface treatment. Ground Connection and Zero range of applications suitable protective earth neutral grounding grid. Three-phase four-wire neutral grounding grid should be used to protect access to zero measures. Since all dielectric breakdown or other reasons may present a hazardous voltage metal parts should be taken to ground or zero. 1, should be taken to ground or zero devices 1) motors, transformers, electrical appliances, lighting equipment, portable and mobile electric appliances such as metal, base and gear attached thereto. 2) metal structures or reinforced concrete as well as indoor and outdoor power distribution unit near energized parts of the metal cover fence, fence or a metal gate. 3) distribution panel, console, console, control box of the metal frame or enclosure. 4) transformer secondary winding. 5) AC-DC power cable boxes metal, metal sheath of steel pipe and cable wiring. 6) fitted with a metal rod lightning line power lines and reinforced concrete tower. 7) mounted on Distribution Feeders switches, capacitors and other electrical equipment. Guangzhou distribution room, Fu Long electricity (certified), power distribution room provided by Nanyang Fu Long Electric Power Engineering Company Limited. Nanyang Fu Long Electric Power Engineering Co., Ltd. (www.nyfulong.com) is Nanyang, Henan, transmission equipment and materials leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Teflon power in leadership with the staff warmly welcome all inquiries negotiations to create Teflon electricity better future.