What should be paid attention to when laying grounding cable, and what should be done to the grounding cable head? What harm does the water in the ground cable head do to the cable?

The advantages of buried lines are low investment and good heat dissipation. Its practice is: the ditch is 70CM deep, 5CM fine sand is laid around the line, then the original soil is backfilled, and finally hard protection (such as bricks) is covered. There can be no joints underground. If there is a joint, it should be set in the ground junction box (convenient for observation and accident treatment). The connector should be waterproof, and water inflow will cause leakage, leakage protector failure, short circuit and other accidents, endangering personal safety and damaging the line.