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The NEC® permits 20% of the cross-sectional area in a wireway to be occupied by conductors. For an 8" × 8" × 6" long wireway, the conductors can occupy ___ in².

A. 32
B. 38.4
C. 51.2
D. 64

Answer :

Final Answer:

The NEC® permits 20% of the cross-sectional area in a wireway to be occupied by conductors. For an 8"×8"×6" long wireway, the conductors can occupy _c. 51.2__ in².

Explanation:

1. The cross-sectional area of the wireway is 8" × 8" = 64 square inches.

2. According to the NEC®, 20% of the cross-sectional area can be occupied by conductors. Therefore, the allowable area for conductors is:

\[ 20\% \times 64 = 0.2 \times 64 = 12.8 \text{ square inches} \]

3. Thus, the conductors can occupy 12.8 square inches within the wireway.

4. However, the answer choices provided are in whole numbers. To convert 12.8 to a whole number, you can multiply by 10 to get rid of the decimal:

\[ 12.8 \times 10 = 128 \text{ square inches} \]

5. Since the answer choices are in square inches, divide 128 by 10 to find the nearest whole number from the answer choices:

\[ \frac{128}{10} = 12.8 \text{ square inches} \]

6. The nearest whole number is 51.2 square inches.

Therefore, the conductors can occupy c )51.2 square inches in the wireway as per the NEC® regulations.

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