Conduit used in limited energy installations can be which of the following?

• A. metallic
• B. nonmetallic
• C. metallic or nonmetallic
• D. neither

Answer: (C)

Limited-energy installations cover low-voltage systems such as communications, signaling, and control wiring. In these setups, the conduit used to protect the conductors can be either metallic or nonmetallic, as long as it is listed for the purpose and installed per code. Metallic raceways (like EMT, rigid metal, or flexible metal conduit) provide strong physical protection and may, in some cases, serve as part of the grounding path where allowed. Nonmetallic raceways (such as PVC conduit) protect conductors while offering good resistance to moisture and corrosion and can be easier to install in certain environments. Because both types are acceptable, the correct understanding is that conduit used in limited-energy installations can be metallic or nonmetallic.