How to grounding lightning protection grounding?
In the cupboard and a MEB box, distribution box shall be the total PE bus, building low voltage power distribution cabinet. The 2 main vertical bars in the column are used for grounding on the line when the potential is grounded, and then the hot galvanized flat steel is led to each LEB terminal box with 40*4. In the elevator shaft from the elevator pit 0.2 meters, and the elevator shaft end below each embedded 100*100*8 hot galvanized flat steel piece, flat steel and column 2 as the main vertical grounding line and welding.
The grounding line IN-C-S system grounding wire with 40*4 hot galvanized flat steel directly to the PE main line, electrical equipment grounding lines, buildings of various metal pipes, building metal structures, embedded parts as a conductor of equipotential bonding. The workshop is equipped with LEB terminal board, all normal, non charged metal objects, metal components are connected by wire LEB terminals.
In the lightning down the line corresponding to the outdoor depth of -0.8M, from being used as the lead line of the steel bar, welding a 40MM*4MM hot galvanized flat steel, this flat steel extended to the outdoor, from the outer wall distance of not less than 1.0M. For connecting equipotential band and adding artificial grounding body.
The main rib of the column is larger than 16MM in diameter and is connected with the galvanized steel bar which is connected with the ground.
The grounding electrode is welded with each other through the pile, the cap and the main reinforcement in the floor plate. Earthing wire using 40*4 hot galvanized flat steel ring for laying foundation along the outer ring, reliable welding and the cap in two main bars, forming a loop net grounding body - the use of pile reinforcement (not less than 2) and the bottom of the pile cap welding reinforcement, pile cap and bottom ribs are welded and the gluten, however after the cap and the gluten and gluten grounding flat floor welding, grounding flat steel for the entire welding pass, all welding length must be greater than 6D. The grounding resistance of the combined earthing device is no more than 1 ohms.
