Wiring Methods & MaterialsPregunta 66 de 120
What is the minimum burial cover for rigid metal conduit installed underground in a location not otherwise specified?
a.18 inches
b.12 inches
c.6 inches
d.24 inches
Explicación
Rigid metal conduit and intermediate metal conduit are permitted at 6 inches of cover because the metal wall provides its own physical protection. Nonmetallic raceways listed for direct burial require 18 inches, direct-buried cable requires 24 inches, and 12 inches applies to GFCI-protected residential branch circuits.
Referencia Legal: 2023 NEC Table 300.5Practica las 120 preguntas gratis — sin registro.
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