An equipment grounding conductor shall be installed in a liquidtight flexible metal conduit (LFMC) when ___________.

  1. used to connect to equipment where flexibility is not necessary to minimize vibration from equipment
  2. used to connect to equipment where flexibility is necessary to minimize vibration from equipment
  3. used to provide flexibility for equipment that requires movement after installation
  4. b and c


Answer: D

As noted in 350.60, it is a mandatory requirement to install an equipment grounding conductor when the LFMC is used to connect to equipment where flexibility is necessary to minimize vibration from equipment or the LFMC is used to provide flexibility for equipment that requires movement after installation.

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.