The NEMA L14-20P plug/receptacle pair is designed for 240 VAC, single-phase service with a maximum current draw of 20 amps. Like all 240-volt plugs and receptacles, the L14-20P has two brass terminals for hot wires, a chrome terminal for a neutral wire and a green terminal for a ground wire.. The wiring diagram for the Nema L14 20p plug consists of detailed instructions on how to connect each wire. The diagram typically includes information on wire color codes, terminal designations, and proper connections.
In the following wiring tutorial, we will demonstrate how to wire a NEMA 5-20 receptacle using both standard and GFCI breakers. The wiring diagrams also show the appropriate breaker ratings and wire sizes for a 20-amp receptacle in both continuous and non-continuous load applications.. Nema L14-20P Wiring Diagram The Nema L14-20P wiring diagram is a visual representation of the electrical connections for a NEMA L14-20P plug. This type of plug is commonly used for 20-amp, 125/250-volt applications and is often found in industrial and commercial settings.