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Cross-section drawn to scale from the Table 6 areas and Table 9A internal diameters: coloured insulation, nylon jacket on T90, solid or stranded copper. Conductors settle to the bottom of the raceway as they would after a pull. Wall thickness is approximate and for illustration only.
Add up the quantity of every conductor listed for the raceway.
Match the insulation designation, voltage, jacket, construction (solid or stranded) and size. Read the area for that quantity of conductors, then add the group areas when sizes or insulation differ.
For ordinary non-lead-sheathed insulated conductors: one = 53%; two = 31%; three or more = 40%.
Use 9C for 53%, 9E for 31% or 9G for 40%. Choose the correct raceway column, then the first trade size with enough allowable area.
A Table 9 allowable-fill area already includes the percentage. Compare the conductor area directly with that value. Do not multiply it by 40% a second time.
After your first check, correct answers lock in green and you get a hint for each red one. The worked solution appears after a correct answer or your second try.