Short answer, no.
Longer answer, the third prong on household outlets connects to a long metal pole buried alongside the foundation of your house. This pole dissipates any excess voltage in electronics that connect to it (via the third prong). If you break the link somewhere along the line by using a 3 prong to 2 prong converter (or by ripping off the third prong) then there is no way for your appliance to dissipate that excess voltage. For smaller electronics this shouldn’t affect their operation too much, but got larger electronics you can shorten their longevity and open yourself up to a whole mess of safety concerns depending on how robust the internal circuitry is.
Should have stuck with the short answer.
Without a ground wire, any exposed metal on the device is probably “floating”. If a 120 V comes in contact with that metal, though either an internal failure or something as simple as a nick in the insulation, it would become a “hot” surface of 120 V; a shock hazard for someone who comes along an unsuspectingly touches it. The ground wire connects those surfaces to 0 V (the ground rod), providing a low impedance path for current to flow so that the breaker or other overcurrent device will trip if that surface were to become energized. (Crucially, the neutral wire is also connected to ground at one point, so the circuit that gets completed does not treat Earth as a “sink”, but just as a reference. Electrically, it means that shorting the 120 V to the metal chassis behaves the same as shorting it to neutral).
The ground wire is *not* used in normal circuit function. It is there only for safety. Devices that are powered through two prong plugs have no exposed metal that could become energized, so the ground prong is not needed or required, and does nothing for those devices.
Last edited by sensij Today at 11:33 AM.