Power connection kits are required on all Zoneline chassisThe correct kit for the installation is determined by the voltage and amperage of the electrical circuit and the means of connecting the unit to the building wiring. If the unit is to be plugged into a receptacle, a line cord kit would be used; if the unit is to be permanently connected, a permanent connection kit would be used.Each line cord kit has an integral Leakage Current Detection and Interruption (LCDI) or Arc Fault Current Interrupter (AFCI) device as required by National Electrical Code (NEC) and Underwriters Laboratories (UL) for units manufactured after August 1, 2004.Units connected through sub-base do not require an LCDI or AFCI device since they are not considered to be line-cord-connected.Junction box for 230/208-volt chassis must be purchased separately - RAK4002B