Three phase and single phase are electricity supplies and it’s the amount of power that is different. A single phase supply is smaller than a three phase supply. Most domestic houses with gas central heating need single phase and have this as standard. If you require two or more electricity meters then you need a three phase connection.
To be entirely sure if you need three phase, we recommend that you speak to a qualified electrician first who will be able to assess all the equipment you will be running and determine how much power you need.
The best way to tell if a property has a three phase supply is by looking at the electrical fuse (sometimes called electricity supply, service head, cut out). Typically a single phase will have one fuse and a three phase service will have three 100amp fuses.
Single phase electricity supply
Three phase electricity supply