CH 3
300.5

Minimum Cover Requirements

NEC 2020 • 2023 • 2026 COMPLIANTFULL
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Comprehensive cover requirements for all wiring methods and locations (0 to 1000 Volts).

Location of Wiring MethodCol 1: Direct Burial Cables (in)Col 2: RMC / IMC (in)Col 3: Nonmetallic Raceways (in)Col 4: Res. Branch Circuits < 120V GFCI (in)Col 5: Irrigation/Landscape Lighting < 30V (in)
All locations not specified below24618126
In trench below 2 in. concrete or equivalent1861266
Under a building (in raceway only)00000
Under min. 4 in. thick concrete exterior slab (no vehicular traffic)18446 (Direct Burial) / 4 (Raceway)6 (Direct Burial) / 4 (Raceway)
Under streets, highways, roads, alleys, driveways, and parking lots2424242424
One- and two-family dwelling driveways and outdoor parking areas1818181218
In or under airport runways1818181818

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This data is provided for informational purposes only. Always verify with the latest edition of the National Electrical Code (NFPA 70) and consult with a licensed electrical professional or AHJ (Authority Having Jurisdiction) before performing any electrical work. Zing² is a reference tool, not a substitute for qualified engineering.