Wiring of L14-30 Connector 120/240V The mating plug part number is L14-30P. If you want to assemble a generator cord by yourself, to connect a cord to the plug, hook up red and black leads to X and Y, white lead to the neutral and green one to the ground (refer to the wiring diagram above). Use a heavy-duty UL-rated cable suitable for outdoor with conductor gauges of #10 AWG. L14 30 Plug Wiring Diagram | Free Wiring Diagram Collection of l14 30 plug wiring diagram. A wiring diagram is a simplified traditional pictorial representation of an electric circuit. It shows the parts of the circuit as streamlined forms, as well as the power as well as signal links between the tools. L14 30r Wiring Diagram | Free Wiring Diagram Collection of l14 30r wiring diagram. A wiring diagram is a simplified conventional pictorial depiction of an electric circuit. It shows the parts of the circuit as streamlined shapes, and the power and also signal connections in between the devices. Nema 14 50R Wiring Diagram - Wiring Diagram And Schematic Description: L14 30P Wiring Diagram With Figure 4 – Wiring Diagram for Nema 14 50R Wiring Diagram, image size 1024 X 529 px, and to view image details please click the image. Here is a picture gallery about nema 14 50r wiring diagram complete with the description of the image, please find the image you need.