OK, so I've gone through probably 90 tutorials on electricity and related topics, and there's a bundle of terms I ran into, used by people ages 12-80 with a dozen different accents and twice as many time zones. (So I'm not sure how many terms are universal and how many are provincial). Live, Common, Ground, Neutral, R/S-Terminal, and Switch line. I have my own extremely limited understanding of Live (power flowing, right? is that an AC term only or does it also apply to DC?), and Vaguely understand Ground to be attaching a third wire to an object with low resistance to act as a place for electrons to seek to be at their most rested Disney Land like state of well being (I like that analogy better than the one about tortured electrons fleeing for their lives). But Neutral and Common? Are those variations of Ground? And R Terminal? Switchline? Are there terms I missed? When I do a circuit, it seems like there's only 3 wires, so why have 6+ terms?