This control box is specifically designed for 3HP, 3 wire, 230V, 1 phase Goulds and Myers pumps with either CentriPro or Pentek motors. Voltage Relay for installer convenience230 volt models – 208 volt relay, 9K479, available for low voltage applications.Start Capacitor for starting torque run capacitors for efficiency and quite operation. Type 3R enclosure for indoor or outdoor mounting.Accepts up to #2 AWG wireMultiple knockouts and two ground terminalsHigher HP models require heavy duty pressure switches.Manual reset overloads on 1½ - 5 HP models