objective<br>The selection of reasonable electric shock and explosion-proof protection measures is directly related to the grounding specifications of the power system, and the design of a standard grounding system will limit the faults of the electrical system and equipment damage.<br>Implementing a safe grounding system also directly reduces the contact voltage applied to individuals when equipment leaks into the casing, ensuring human safety.<br>requirement<br>-Grounding resistance value R ≤ 4 Å<br>-Protect personnel and equipment from the danger of step voltage.<br>-The lifespan of the grounding system is greater than or equal to the lifespan of the building.<br>-The equipment casing is connected to the nearest grounding copper plate.<br>-The connecting wire from the grounding copper plate to the equipment casing must ensure mechanical strength.<br>-High work reliability and limited maintenance.<br>-Maintain the operational function of the electrical system.
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