1. Lightning protection grounding resistance test method:

Detect the grounding resistance of lightning rods, high-rise buildings and other facilities, and whether it can be smoothly led into the ground after lightning.

1. You first find the grounding lead of the lightning protection grounding grid or the equipotential bonding box.

2. Use a grounding resistance tester to measure the grounding resistance

(There are two 0.4M test piles that need to be inserted into the soil, one is 20 meters away from the test point, and the other is 40 meters away. Therefore, there must be soil within 42 meters of the test point.The lightning protection grounding resistance tester measures the grounding resistance. There are two test piles that need to be inserted into the soil, one is 20 meters away from the test point and the other is 40 meters away, so there must be soil within 42 meters of the test point, or use FCR3000G clamp Lightning protection grounding resistance tester, directly stuck the grounding wire for testing).

3. The smaller the grounding resistance, the better. The specific qualified value must be specified in accordance with the design requirements when the design requires it, and it cannot be greater than 4 ohms when the design does not require it.

2. Precautions for lightning protection grounding test

1. It is forbidden to measure when there is lightning or the object under test is electrified.

2. The meter must be handled with care when carrying and using it to avoid severe vibration.