How often should the distribution box be repeatedly grounded
After any major change to an electrical distribution system, every three years (maximum), or if ground-related issues are suspected, a qualified electrical contractor or professional engineer should verify the grounding system is in accordance with the National Electric Code. 26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used. Safety of Personnel: By safely channeling fault currents into the ground, proper grounding helps to reduce the risk of electric shock to personnel. This helps to reduce the potential difference that exists between conductive parts and the earth.
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