In the original version of this article, the second figure contained an error. The image has been updated. It’s important for engineers to have a good, working ...

In a 3 phase system there is a centre point. (like the optional neutral in the Wikipedia image). In domestic power this neutral point is normally grounded to earth, giving 3 phases with equal voltage ...

The majority of homes in the UK use a single-phase electricity supply. This means a maximum charging rate for electric cars of 7kW. Apart from private homes, however, much of this country is served by ...