The wiring methods allowed for underground service entrance installations are listed in Section 230.30(B).They include rigid metal conduit (RMC), intermediate metal conduit (IMC), __________, and USE conductors or cables.
A) rigid PVC conduit (PVC)
B) Type NM cable
C) Type AC cable
D) electrical metallic tubing (EMT)

Question

Quizplus · Accepted Answer

Rigid PVC conduit is the best choice for underground service entrance installations because it is resistant to corrosion, moisture, and underground contaminants. It is a durable option for protecting the electrical wiring and can handle the stress of being underground. The other options listed are not as suitable for underground installations due to their lack of resistance to underground conditions.

The Wiring Methods Allowed for Underground Service Entrance Installations Are