Question

For a rigid metal conduit having 3 or more wires 36" in length, what's the largest cross sectional field of these wires?

1. 20%
2. 30%
3. 40%
4. 60%

Answer 1

The largest cross-sectional field of the wires in a rigid metal conduit depends on their arrangement and sizes.

Step-by-step explanation:

The largest cross-sectional field of the wires in a rigid metal conduit would depend on the arrangement of the wires. If the wires are placed in a symmetric arrangement, the total cross-sectional area occupied by the wires would be the largest. In this case, the percentage of the largest cross-sectional field would be determined by dividing the sum of the cross-sectional areas of the wires by the total cross-sectional area of the conduit and multiplying by 100%.

For example, if there are three wires with cross-sectional areas A1, A2, and A3, the largest cross-sectional field would be achieved when the sum of the three areas (A1 + A2 + A3) is the largest. The percentage of the largest cross-sectional field would then be (A1 + A2 + A3) divided by the total cross-sectional area of the conduit, and multiplied by 100%.

So, the correct answer would depend on the specific arrangement and sizes of the wires in the conduit, and cannot be determined without more information.