To install a chemical earthing electrode properly, start by selecting a suitable location with low soil resistivity. Dig a pit of appropriate dimensions, usually 2-3 meters deep, depending on the electrode length. Insert the electrode vertically into the pit. Fill the space around the electrode with a grounding compound or bentonite to enhance conductivity. Ensure the electrode is properly connected to the electrical system using suitable clamps and conductors. Finally, backfill the pit with soil and compact it. Regularly test the earthing system for efficiency to ensure a safe and reliable grounding solution.