The subway station earthing terminal is designed according to strict national standards, The McNair electrical terminals of experts to introduce the application of such terminals and protection missed.

Metro Station Project for the long-term goal of the project, and the station grounding grid are set below the station main structure, once implementation is completed, the basic replacement conditions are not available.

Ground material for the subway station, under the premise that meet the requirements of other ground, but also consider the effects of corrosion, and depending on the geological survey data, Chengdu subway station under the soil are generally corrosive, while considering the subway itself is also to some extent, to increase the corrosion of the ground material, compared with the other ground materials (such as steel, etc.), the copper material has good corrosion resistance, to meet the real life needs of the metro hundred years of engineering.

Considered view of the subway station earthing terminal copper material is not easy to protect, grounded in the follow-up construction drawings and design requirements of the anti-theft and protection measures proposed after the end of the construction, grounding lead wire should be noted that the proper preservation oilcloth wrapped with cement sealed, to avoid losing, breaking "the requirements.

In summary, in order to meet the requirements of protection and carrier, The McNair said: subway station earthing terminal must be copper material.