>>8048969

AC.

Electricity flows on hot wire, what's unused comes back on neutral.

Single phase = 1 hot 1 neutral 110v

Single phase = 2 hots 1 neutral shared 220/240v

Three phase = 3 hots 1 neutral shared 208/277/480

>>8049219

Yes, digital information can be transmitted through AC current, without smart meter.

Light bulbs can be used to read "sound pressure waves" and send that back to a central location for example.

>>8049300

Water example

Volts = amount of water in a river

Amp = how strong the flow is.

>>8049371

Yes, you are right. I need more covfefe.

Higher the amperage, the larger the wire needed.