Greetings :) Recently I have discovered how fascinating electrical engineering is, and so I have been doing some studies on my own time before entering college. I have several questions regarding electrical power distribution systems. 1.) What exactly is the purpose of the neutral wire? From what I have read, I am assuming that it is a cable that carries the sum of all three phases so that in case there is an imbalance, the imbalanced voltage/current will flow from the neutral to the ground. Am I way off? 2.) What would happen if there was no neutral wire? 3.) What is the meaning of center-tapped? From what I have read, I am assuming that it refers to the neutral wire that is attached at a point equidistant from the two live wires exiting from the ends of the transformer secondary coil. 4.) What do delta and wye formations represent? 5.) What is the purpose of the neutral contact on the outlet? Is it similar to that of the one following the power lines? I may have more later, and I will add accordingly. Thanks in advance!