Refer to Figure 208.51. The minimum calculated dimension for left-to-right length of the box is ___ inches. All conductors enter the right side of the pull box and exit the bottom. Conduit G = 3", H = 3 1/2", J = 6", K = 3", L = 4", M = 2", N = 2 1/2"

• A. 39 1/2
• B. 32
• C. 42 1/2
• D. 31 1/2

Answer: (D)

The idea behind the minimum left-to-right length is to ensure there is enough space inside the pull box to route all conductors from the right-side entry to the bottom exit without crowding, while leaving room for proper bends and the box ends and clamps. Each conduit contributes a horizontal amount toward that length, so you add the horizontal components of the conduits that must be accommodated.

In this setup, the horizontal portions from all the conduits sum to 24 inches (G + H + J + K + L + M + N = 3 + 3.5 + 6 + 3 + 4 + 2 + 2.5). But you also need extra length to account for the end walls, clamps, and the required space to pull the conductors through, which adds 7.5 inches. Together, that gives a minimum left-to-right length of 31.5 inches.

So the length must be at least 31.5 inches to satisfy both the conduit routing and the physical space needed for pulling and securing the conductors.