Electrical wiring
Electrical wiring refers to the placement and configuration of conductive wires for electricity supply in or to some facility. "Building wiring" is a similar term.
electrical wiring practices vary a lot by country. This article provides general information that should apply worldwide
on or off the grid
Electrical wiring may be "on the grid", meaning that it is continuous with common electrical utility supplies. In most of the Americas, this means alternating current at 60 Hz, with 120 volts nominal. In European countries, this means alternating current at 50 Hz with 230 nominal volts.
"Off the grid" electrical wiring is often configured to carry direct current. Dc systems often run at a lower voltage than AC systems and so heavier wiring may be needed. This however is often offset by the fact that off grid systems are usually configured to minimise electricity use.
see also