Fill in the blanks with the correct answers. Where a raceway enclosing a feeder or a branch circuit enters a building or structure from an underground distribution system, it shall be ________ in accordance with 300.5(G). This also includes ________ raceways.

  1. installed; PVC Schedule 40 type
  2. installed; non-listed
  3. sealed; spare or unused
  4. installed; aluminum

Answer: C

Per a change in Sec. 225.27 of the 2011 NEC, a seal is now required at either or both ends of a raceway(s) entering a building or structure from an underground distribution system that encloses feeder or branch circuit conductors in accordance with 300.5(G). The sealing material may be something as simple as "duxseal" or other approved material; however, the sealant shall be identified for the cable insulation, shield, or other components.

Owen is the owner and president of National Code Seminars and the holder of master electrician certifications in 46 states. He can be reached at necexpert@aol.com.