132HC Mast Section How to do a good job of grounding safety protection for tower crane equipment
In building construction, the tower lifting equipment used needs to be handled safely. Aluminum conductors and threaded steel shall not be used for grounding or underground grounding in the installation tower. The wire to be bolted must have an end. Take note of grounding:
1. Copper conductors with a cross section of not less than 28 mm or steel conductors with a cross section of not less than 50 mm are buried in the grooves, and the embedding length is determined by the grounding resistance.
2. The floor is made of steel plates or other extensible metal plates with an area of 1 square meter. 1.5 meters from the ground.
3. The ground body adopts a regular ground pile or a 1.5-meter steel pipe of 33 * 45 meters in length, or a 1.5-meter angle steel of 70 * 70 meters in length.
4. In the above three methods, the cross-sectional area of the ground body leading out of the steel wire should not be less than 25. If the soil is poorly conductive, sodium chloride can be buried in the soil and then filled with water. For a walking tower crane, each rail must be grounded, and a wire connection is applied between the two rails. Electrical connections shall also be made between the two rails, and the grounding resistance shall not be greater than 4.
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