I JUST UP GRADED TO A LARGER GENERATOR BECAUSE I BUILT A IN-LAW APARTMENT SO I NEEDED MORE POWER, THIS GENERATOR I RAN ON L P GAS BUT IT CAN ALSO RUN ON NATURAL GAS BY A SWITCH. I HAVE ALL PARTS SUCH AS 100 AMP AUTOMATIC TRANSFER SWITCH WITH (WHIP) 25 FT. WIRES. 35 AMP SHUT OF SWITCH.ALL WORKING CONDITION.