Calculation of engineering quantity for lightning protection and grounding plane layout of residential buildings

Question 1: You can go to GB50057-20 10, which has a detailed explanation.

Question 2.9 is followed by the design quantity on the drawing. Note that there are three particularly small circles on the left and right of the figure, which are the positions of the grounding electrodes.

Question 3: The buried depth of outdoor grounding bus is also the relevant provision of GN50057-20 10 on the buried depth of grounding body in Code for Lightning Protection Design of Buildings.

Question 4 is the same as question 2. It is divided into three groups, and each group uses three grounding electrodes.

Question 5: There are five grounding points on the map, so the number is five.

Question 6: Every two grounding electrodes are called one section, so there are six sections, and each group is grounded for two sections.

If you don't understand, you can continue to ask.