Grounding exterior cables is just as important as choosing the right cables for your television or Internet system. Grounding will prevent shocks from lightning strikes and surges from shooting across your coaxial cable and into the back of your television or Internet system. It's also not very difficult: anyone capable of connecting a coaxial cable can ground that same cable to an existing electrical ground with little problem.
Attach the grounding block to your home, somewhere close to where the coaxial cable comes in. A grounding block will have at least two screw holes; drill holes for each, then secure the block to the wall with the included screws.
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Disconnect the coaxial cable from the splitter and connect it to one side of the grounding block. This can be done simply by twisting the end until it comes loose.
Lightly coat the ports on the grounding block with the silicone grease. This will assist in weatherproofing the ports. Do the same for any open ports on the coaxial splitter.
Connect a new RG-6 coaxial cable to the point on the splitter where the previous cable was disconnected. Then attach the other end of the cable to the other side of the grounding block. Coaxial cables attach by inserting the pin from the center of the cable into the pin-sized hole on the port, then twisting the cable until it secures in place.
Attach the grounding wire to the grounding screw on the grounding block. Loop the wire around the screw and twist the screw in until the wire is secure. Then run the wire to the electrical ground and attach the wire there in the same manner. If no screw is available, twist the end of the cable around the ground as tightly as possible; crimping with pliers if necessary.