Conduits or raceways shall not rise more than how many inches above the bottom of switchboards or floor-mounted panelboards?

• A. 6 in
• B. 2 in
• C. 1 in
• D. 3 in

Answer: (D)

The rule checks how far conduits or raceways may project above the bottom edge of switchboards or floor-mounted panelboards. Limiting this rise to three inches helps keep the wiring neatly engaged with the equipment, reduces the chance of damage to insulation or conductors as panels are opened or closed, and prevents the conduits from interfering with the panel’s operation or maintenance access. Any rise greater than three inches would violate the standard, while smaller rises (one or two inches) would still be compliant, but the question focuses on the maximum permitted distance.