Illustration should be based on the latest NEC and should include

• a grounding system for a dwelling with 10 feet of metal pipe
• a grounding system for a dwelling with no metal pipes
• a grounding system between a panel and a subpanel
• the appropriate NEC table for selection of grounding electrode conductors
• the appropriate NEC table for selection of grounding conductors for raceways and equipment. 

Process/Skill Questions:

• What is the largest grounding conductor to a supplementary grounding rod?
• What is a grounding ring?
• What is the minimum distance between multiple ground rods?
• What is a Ufer system, and when is it required?