Although copper bonded rods are maintenance-free, occasional inspections can prolong their lifespan and provide peak performance. Start with visual examinations of exposed terminals for rust, corrosion, or loose connections. Test the earth resistance every 6–12 months to keep track of system efficiency. Drastic changes might be caused by grounding problems resulting from soil movem... https://www.pioneerpowers.com/copper-bonded-earth-rod.php