Electric wiring carrying voltages greater than 21 volts shall be armored or in conduit and, if dry ingredients are employed, the wiring shall conform to the requirements of Class II, Division 2 of the National Electrical Code NFPA No. 70. The materials protecting the electric wiring must be of such composition that they will not be chemically attacked by the ingredients being processed.
Conn. Agencies Regs. § 29-349-353