What material is applied to the main grounding electrode? What's the size?
This is right, flat steel and so on. The area is 0.75mm2
Flat steel, the area should be no less than 0.75m2, the thickness of 5mm.
The main grounding electrodes are made of angle iron, steel plate, copper plate, round bar, flat steel and so on. The area is 0.75mm2, and the thickness requirement is 5mm
