To reduce the chance of electrical shock and fires, service panels need to be grounded. Proper grounding directs unwanted electrical current from the home into the ground. Installing a grounding rod ...

Proper grounding and bonding prevent unwanted voltage on non-current-carrying metal objects, such as tool and appliance casings, raceways, and enclosures, as well as facilitate the correct operation ...

All Code references are based on the 2005 NEC. The grounding and bonding requirements in this column apply to solidly grounded systems that operate at not more than 600V, such as 120/240V, 120/208V, ...