Fill in the blanks. When installing temporary wiring in exhibition halls, for events such as trade shows, the temporary wiring is __________ to be installed in accordance with Art. 590. Flexible cables and cords approved for hard or extra-hard usage __________ permitted to be laid directly on the floors where protected from contact by the general public. Ground-fault circuit-interrupter protection __________ required.

  1. required / are not / is
  2. mandatory / are not / is
  3. permitted / are / is not

Answer: C

As per 518.3(B), "In exhibition halls used for display booths, as in trade shows, the temporary wiring shall be permitted to be installed in accordance with Article 590. Flexible cables and cords approved for hard or extra-hard usage, are permitted to be laid directly on the floors where protected from contact by the general public. The ground-fault circuit-interrupter requirements of 590.6 shall not apply."

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.