Consult with a qualified electrician, and determine the best place to drive in the ground rod. As a rule, ground rods should be placed as close as possible to the cage. Grasp your sledge hammer. Pound the ground rod into the ground. Sink it to a depth of 7-8 feet. Wet the ground around the rod, so it will go in easier. According to the Faraday Cage Organization, Faraday cages have to be grounded.
Contract an electrician to connect the building to the ground rod with wire. Electrical connections require an in-depth knowledge of electricity, and should only be done by a qualified electrician. The electrician will also determine the size of the wire, depending on what you want to stop. Radio waves are weak, whereas a lighting bolt is strong. Converse with the electrician, and he will determine the size of the wire needed.
Instruct the electrician to run a connecting wire to all the metal panels. All the panels must have a good electrical connection between them. The metal door must also have a electrical attachment wire. The electrician has specialized knowledge of how to electrically connect the door to the building.