Licensed electrician came to my place and installed a Nema 14-50 outlet. When completed, he showed me the digital meter showing 120V. After he departed, I realized it should be reading 240V not 120V. However, I came across a video that partially showed a meter reader and I thought I saw it as 120V as well. So I figure maybe its because each Hot is 120 for a total of 240? So if you test One Hot with Neutral or Ground it will show 120V. If you test both Hots at the same time - it will show 240V?