Duplex Electrical Receptacle Wire Connections - wiring details If you are going to install more than a single duplex receptacle in one location I prefer to use the dupelx-receptacle wiring approach described in the article above. Two or more such receptacles can be ganged together in a box provided wiring, circuit ampacity and connections are properly selected and installed. US2974301A - Duplex plug receptacle - Google Patents It is a further object of the invention to provide such a duplex receptacle having a grounding connection. It is a still further object of the invention to provide a duplex receptacle, the two plug receptacles of which may be electrically isolated from each other although normally initially connected.Cited by: 29Publish Year: 1961Author: Saul I. Slater Wiring Diagrams for Electrical Receptacle Outlets - Do-it Wiring an Ungrounded, Non-Polarized Outlet. This is the oldest version of a wall receptacle that you will find. It lacks a grounding contact and the plug slots are both the same size. These devices did not make use of a ground wire and both plug slots were treated the same with regard to polarity. Wiring Diagrams for Multiple Receptacle Outlets - Do-it Wiring Multiple Outlets and a GFCI. Here a gfci receptacle is added at the end of a row of duplex receptacles for single-location protection. The first outlet is connected to Duplex - Electrical Outlets & Receptacles - Wiring Devices Get free 2-day shipping on qualified Duplex, Electrical Outlets & Receptacles products or buy Electrical department products today with Buy Online Pick Up in Store. Duplex - Electrical Outlets & Receptacles - Wiring Devices & Light Controls - The Home Depot Understanding the wiring in an electrical receptacle - YouTube a basic explanation of the wiring of an electrical receptacle (plug-in), so you'll know what to do when replacing one. Wire An Outlet How to wire an outlet. Standard outlets are known as duplex receptacles. There are a few options to choose from when you wire an outlet. Most are wired so they are hot at all times but some are wired so they are switched off and on. You can also wire outlets so that only the top or bottom receptacle is hot at all times and the other is switched.