A visual inspection of a conduit body shows three 12 AWG THHN conductors entering and three exiting. According to the NEC, what is the primary factor that determines if this conduit body is acceptable for use?

• The conduit body is installed in an accessible location.
• The conduit body is durably and legibly marked by the manufacturer with its volume.
• The conductors are 12 AWG or smaller.
• The total number of conductors does not exceed six.