Question

If metal underground water pipe is utilized for grounding (as a grounding electrode) it will have the smallest of how many ft in (direct) contact with the earth.

a 1. 6 ft
2. 8 ft
3. 10 ft
4. There is no needment

Answer 1

If metal underground water pipe is utilized for grounding, it should have at least 10 feet of direct contact with the earth.

Step-by-step explanation:

When metal underground water pipes are used for grounding, they need to have a certain amount of direct contact with the earth to effectively dissipate electrical charges. The National Electrical Code (NEC) specifies that metal underground water pipes utilized as grounding electrodes should have at least 10 feet of direct contact with the earth.