For a straight pull, the minimum distance to the opposite wall is how many times the trade size of the largest raceway?

• A. 6x
• B. 8x
• C. 4x
• D. 10x

Answer: (B)

When pulling conductors straight through a raceway, you need a clear straight run before the pull enters any bend to prevent kinking, snagging, or excessive friction. The rule uses a simple guideline: the minimum straight-pull length is eight times the trade size of the largest raceway in the run. This gives enough room for the conductors to advance smoothly and to accommodate the largest diameter, ensuring the pull remains manageable as it transitions into turns.

So, the minimum distance to the opposite wall is eight times the largest raceway’s trade size. For example, if the biggest raceway is 2 inches in trade size, you’d want at least 16 inches of straight space. The other options (6x, 4x, 10x) don’t align with this standard, making 8x the correct choice.