Wiring Diagrams - Holden A Relay is an electrical switch which uses low wattage current to open another switch. It is this second switch that carries and switches the high wattage current. This is a modern encapsulated general purpose Relay. It has a bracket with a fixing hole or can be used with a relay socket. It operates on 12 volts up to 15 amps and is normally open. Single Phase Electrical Wiring Installation in Home – NEC Single Phase 120V/230V Distribution and Panel Board Wiring in Home. Single Phase wiring installation is the most common wiring in residential buildings. In Single Phase supply (230V in UK, EU and 120V & 240V in the US & Canada), there are two (one is Line (aka Phase, Hot or Live) and the other one is Neutral) incoming cables from the utility poles to the kWh energy Three Phase Electrical Wiring Installation in a Multi In today electrical wiring installation tutorial, we will show how to wire a Three Phase Consumer Unit Installation in a multi-storey building from Utility Pole to a 3-Phase Energy Meter & 3-Phase Distribution board and then How to connect Single Phase & Three Phase Loads in a Three Phase Wiring Distribution System in home electric supply system. Wiring a Light Switch | Wiring a Ceiling Rose | DIY Doctor Switch in electrical circuit. The switch simply interrupts the live feed to the light and enables you to turn the light on and off by disconnecting the live flow. Ceiling Rose wiring. The switch connections in the ceiling rose are as shown. Ceiling Rose switch connection Spur Socket | Advice on Electrical Spur Wiring | Adding a Spur Socket Wiring – How to Add an Electrical Socket to a Circuit. Need to add a socket? This project is about how to add a spur socket or additional socket(s) to an existing circuit. It includes advice on electrical spur wiring with diagrams so that you can find out how to wire up a spur plug socket or have a spur fitted.