Land system installation includes the copper plated steel piles 16x2400mm, the piles close below 0.75 metres wide, deep trench 0.5 metres, the grounding is closing down 10 cm from the bottom of the trench, the distance of the two piles in a row is 4-5 meters in the basement. Bare copper cable used to link the M70 piles. Use the method of welding thermal chemical welding connect the grounding and cable to ensure contact information about your school.The system ground is treated with chemicals that reduce electrical resistivity sprayed evenly in the next track, this chemical will keep the grounding resistor value to long-term stability.At the location of the pile has the lightning comes down mounting 01 escape cable box with composite earthing to check for grounding resistance value of every yearThe target should be achieved: grounding resistance of ground connection ≤ 4 Ω. If construction is completed when the measure not standard on the report with the agency designed to make system additions.
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