Can I use a two prong plug in a 3 prong extension cord?
By using a device with a two prong plug with a three-prong extension cord, the device is not connected in any way to the ground wire in the cord. You can use the device in that way, however, you CANNOT place a three-prong device into a 2 prong plug. This will leave the Ground (third prong) exposed and can cause electrocution if touched. It is best practice to match the number of prongs on the device to the correct extension cord.