Question

A ground ring encircling the building or building in direct contact with the earth of a depth below the earth's surface no below 2 ½ ft and consisting a minimum of 20 ft of bare copper wire will not be smaller than:

1. #2 AWG
2. #4 AWG
3. #6 AWG
4. #8 AWG

Answer 1

A ground ring encircling a building or in direct contact with the earth should consist of a minimum of 20 ft of bare copper wire. The correct gauge for this wire is #2 AWG.

Step-by-step explanation:

A ground ring encircling a building or building in direct contact with the earth is used for grounding purposes. The depth of the ring below the earth's surface should be at least 2 ½ ft, and it should consist of a minimum of 20 ft of bare copper wire. The question asks for the gauge of the wire, and the correct answer is option 1, #2 AWG (American Wire Gauge).