【Daily Discussion】Utilities - Mechanical & Electrical - 20200907

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, random inspections should be carried out to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.

1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding system is completed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, random inspections should be carried out to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, random inspections should be carried out to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, it is necessary to conduct random inspections to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, it is necessary to conduct random inspections to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements

The installation requirements for lightning protection devices mainly include: ① The construction of the entire lightning protection grounding system should follow a bottom-up approach, that is, the grounding system is installed first, followed by the laying of down conductors, and finally the installation of lightning arresters； ②The exposed lightning receptors and downconductors shall be made of hot-dip galvanized materials; mechanical connections are preferred. If welding connections are unavoidable, the connection points shall have enhanced anti-corrosion coatings ； ③The exposed lightning protection strips, meshes, and down conductors should be straight; bends should be in an arc shape, with no sharp corners allowed ； ④The equipotential ring of high-rise buildings shall be connected to the lightning protection grounding main wire; end branches shall not be used as continuous conductors ； ⑤Each building shall have at least two measurement points above the ground level for determining the grounding resistance, which shall be clearly marked.

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, it is necessary to conduct random inspections to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, random inspections should be carried out to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.

(1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding device is installed, then the down conductors are laid, and finally the lightning receptors are installed. (2) The exposed lightning receptors and down conductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. (3) The equipotential ring of high-rise buildings should be connected to the lightning protection grounding main. (4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. (5) After the completion of the entire lightning protection and grounding system, random inspections should be carried out to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.

1) The construction sequence for the entire lightning protection and grounding system follows a bottom-up approach: first, the grounding system is completed, then the down conductors are laid, and finally the lightning receptors are installed. ??(2) The exposed lightning receptors and downconductors shall be made of hot-dip galvanized materials. The exposed lightning protection strips and down conductors should be straight, with bends made in an arc shape; sharp angles are not allowed. ??(3) The equalization rings of high-rise buildings should be connected to the lightning protection grounding main line. ??(4) There shall be at least two measurement points above the building floor for determining the grounding resistance, which shall be clearly marked. ??(5) After the completion of the entire lightning protection and grounding system, it is necessary to conduct random inspections to check the conductivity of the system as well as the grounding resistance value of the grounding devices; the results must meet the design requirements.