First of all, lightning protection grounding can fully use the reinforcing steel in the building foundation as the grounding body. However, it is necessary to electrically connect the reinforcing steel rods and use the vertical steel bars in the house pillars as the down conductors, and always connect with the roof lightning protection facilities. Secondly, many of the requirements for rebars to be used for manual grounding are those that are used when the building foundation itself is used for grounding and cannot reach the required resistance. Even if artificial grounding is used in this way, the effect is better than The building itself is poorly grounded.
So use the building steel reinforcement directly as a grounding body!
note:
1. The basic rebars are to be electrically connected well, at least one round of the perimeter is guaranteed to be continuous. The cross-linked material is recommended to use 12mm round steel with a welding length of about 150mm.
2. The average distance between the deflected leads should be less than 25 meters. If the house is not large, there should be a lead in the four corners.
3. It is recommended to use two 16MM rebars or four 14MM rebars at each point. Make sure that the down conductor connects the grounding body and the roof lightning protection device together.
So use the building steel reinforcement directly as a grounding body!
note:
1. The basic rebars are to be electrically connected well, at least one round of the perimeter is guaranteed to be continuous. The cross-linked material is recommended to use 12mm round steel with a welding length of about 150mm.
2. The average distance between the deflected leads should be less than 25 meters. If the house is not large, there should be a lead in the four corners.
3. It is recommended to use two 16MM rebars or four 14MM rebars at each point. Make sure that the down conductor connects the grounding body and the roof lightning protection device together.
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