For 1" LFMC, the maximum distance from a box to the first support strap is ___ ft.

For 1" LFMC, the maximum distance from a box to the first support strap is ___ ft.

• A. 6
• B. 10
• C. 3
• D. 1

Answer: (D)

LFMC must be secured very close to where it enters a box. The code requires the conduit to be fastened within 12 inches (1 ft) of a box or fitting, and then supported at regular intervals along its length (up to about 4.5 ft apart). Because the first support must be within that 12-inch window, the maximum distance from the box to the first strap is 1 ft. Distances like 3 ft, 6 ft, or 10 ft would leave too much movement near the box and could loosen connections or damage the box over time. After the initial support, you’d continue spacing supports roughly every 4.5 ft along the run.

LFMC must be secured very close to where it enters a box. The code requires the conduit to be fastened within 12 inches (1 ft) of a box or fitting, and then supported at regular intervals along its length (up to about 4.5 ft apart). Because the first support must be within that 12-inch window, the maximum distance from the box to the first strap is 1 ft. Distances like 3 ft, 6 ft, or 10 ft would leave too much movement near the box and could loosen connections or damage the box over time. After the initial support, you’d continue spacing supports roughly every 4.5 ft along the run.