I have a Generac 4000EXL generator that has a 120/240 volt AC, 20 amp locking receptacle. The receptacle accepts a NEMA L14-20 plug (included with the generator). Instructions state to use a 4-wire cord set rated for 250 volts at 20 amps and that you can use the same 4-wire cord if you plan to run a 120 volt load. I need this 20 amp souce to run my 120 volt compressor and I'm lost as to how to wire this. It seems counter intuitive to me that one receptacle can run both 120 and 240 volt loads using the same cord. All help is appreciated.
The operator manual can be viewed from the following link.
http://www.generac-portables.com/ser...ch_results.cfm