1. The implementation of waterproof box is accompanied by the provisions on cable and wire, communication cable and communication cable burying in the power engineering and communication construction of big cities. The solutions provided for cable branching, docking and waterproof are very key suggestions. Plastic waterproof box has been successfully used abroad for more than 20 years, and now it is also used in many fields in China.

2. Before 2001, metal waterproof boxes made of iron were mostly used in China. After 2000, China's high and new technology developed rapidly, and the plastic processing technology became more and more perfect. The plastic waterproof box gradually replaced the metal waterproof box because of its low cost, good dielectric strength and high waterproof level.