Learn how to wire NEMA L14-30P receptacle and understand its diagram. Detailed instructions and step-by-step guide included., Yes, you wired the NEMA 14-30 receptacle correctly. That receptacle has two hot connections, each 120V but on different phases, resulting in a 240V potential. So if you take a voltage tester you will find it reads 240V between the two rectangular slots on the outlet, and 120V between either rectangle and the neutral or ground. You can check this using your voltage tester, but it sounds like , Learn how to properly wire a NEMA L14-30 plug for your generator or other power source. Step-by-step instructions for a safe and secure connection., Learn how to wire a Nema 14 30p outlet with a wiring diagram. Step-by-step instructions for proper installation and connection., The NEMA L14-30 plug and receptacle are designed to lock together. They can handle 240-volt electricity up to a current of 30 amps. Here's how to wire the plug properly in just a few steps., NEMA connectors are power plugs and sockets used for AC mains electricity in North America and other countries that use the standards set by the US National Electrical Manufacturers Association. NEMA wiring devices are made in current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V)..