Milutin Miletich is a retired technology engineer (not electrical), , he has invented something extraordinary. Alternating current is filtered and flows through ONE wire only and powers a classic light bulb. His words are that he was able to join positive, negative and the ground into one electrical flow, and that is not all - human can hold the wire without any problems! The power is 220V in Serbia (you can see in the video that he is using the regular power supply), and 220V powers the light bulb, so voltage stays the same.
There are no sparks, the power is totally safe, even you cut the wire, the flow will stop but without any sparks. So safety is one of the greatest benefits.
He says that he was able to make sure that no electrons would escape the wire. His claim is also that there are significant (drastic) savings in power consumptions (he is using it for his water heater and thermal blanket). He also says that this type of current can heat the wire up to 1000C and be used as a heater, and that all high voltage cables could be replaced with a much smaller profile wire. He also claims that this setup can be adjusted so that 5Kw flows through 1mm wire. With slightly bigger profiles, much more power could be used.
He says he had worked on this patent for 20 years, and it is now being evaluated by the patent office.