Grounding the Service
A word about grounding and bonding. At first, these two terms seem interchangeable but, although similar methods are used for both, they are technically different. To keep it simple, grounding is providing a path back to an earth ground whereas bonding is connecting two conductive items so that there can be no current or voltage flow between them. All grounds in your house eventually go back to the main service and, through the grounding electrodes, to the earth.
In this section I will cover grounding the main service and bonding the required items to it. Grounding and bonding of other systems or parts will be covered in their respective articles.