ARTICLE 310: Conductors for General Wiring

NEC Figure 310.60

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Figure 310.60. Cable installation dimensions for use with Tables 310.77 through 310.86.

Detail 1 290 mm x 290 mm (11.5 in. x 11.5 in.) Electrical duct bank One electrical duct Detail 2 475 mm x 475 mm (19 in. x 19 in.) Electrical duct bank Three electrical ducts or 675 mm x 290 mm (27 in. x 11.5 in.) Electrical duct bank Three electrical ducts Detail 3 475 mm x 675 mm (19 in. x 27 in.) Electrical duct bank Six electrical ducts or 675 mm x 475 mm (27 in. x 19 in.) Electrical duct bank Six electrical ducts

Detail 4 675 mm x 675 mm (27 in. x 27 in.) Electrical duct bank Nine electrical ducts Detail 5 Buried 3 conductor cable Detail 6 Buried 3 conductor cable
Detail 7 Buried triplex cables (1 circuit) Detail 8 Buried triplex cables (2 circuits) Detail 9 Buried single-conductor cables (1 circuit)
Detail 10 Buried single-conductor cables (2 circuits)
Legend

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