The system currently does not come with a plug. This is because it requires 220v and there are a lot of different 220v wiring configurations out there and all kinds of 220v plugs as well. However, there are 3 wires, white, black, and green. The white and the black are the ones that have the actual power going through it. The green is just for high voltage safety. The system will work without connecting the green wire but it is highly recommended for safety that it is wired properly. We are not responsible for improper wiring damages.