In order to safely use electricity and prevent electric shock accidents, the solar lighting system should use a grounding device. Grounding can be divided into working ground, protective ground and mine-proof grounding.

1, working ground: the low-voltage power grid neutral point directly grounded, the system ground resistance should be less than 10 s.

2, protection ground: in order to prevent the equipment leakage endangers the safety of people and equipment, all electrical equipment exposed conductive parts through the ground wire ground, ground resistance should meet the installation action requirements of leakage protectors.

3, lightning-proof grounding: in order to prevent electrical equipment from being struck by lightning, lightning rod, lightning wire and lightning protection devices such as lightning protection devices to ground, ground resistance should be less than 10 s.

4, zero: the electrical equipment metal shell, metal frame and so on with the neutral ground wire connection.

The ground wire should use insulated wires and use the entire line, with no connectors in the middle. The ground wire of the lightning escaper should be selected for the shortest distance to the ground wire. The phase-line intercept area of the protection device is S-16mm2, the minimum intercept area of the ground wire and the protection line is S;1635, the minimum intercept area of the ground wire and the protection line is S/2. the minimum intercept area of the ground wire and the protection line is S/2. the welding length of the flat steel is 2 times the width of the flat steel.