Suitable for simple circuits where only live wire control is needed. 2P (Double Pole): Controls and protects both the live and neutral wires, offering the highest level of. Single Phase wiring installation is the most common wiring in our homes and residential buildings. The Single Phase supply is 220Vac supply, which consists of 2 wires, one wire is Live and the other one is Neutral. more Welcome to our channel! In this video. A distribution board or distribution box is where the main power supply is distributed to multiple loads.