What is the difference between phase and neutral?
Ac current have both directions pahse and neutral, phase is just one of three in a 3-phase network. Neutral is zero or it is in center of coordinate digram between phase and neutral. In the diagram the neutral is at the center, and each arrow represents a phase vector. In this case the mains voltage is 120 V, and when you look at only one phase you could invert the arrow and still have a 120 V sine. But the phases aren’t just related to the neutral, they’re also used with respect to the other phases. If you would measure the voltage between the A phase and the B phase you’d find that it’s √ <span class="MathJax" id="MathJax-Element-1-Frame" tabindex="0" data-mathml="3″ role=”presentation” style=”margin: 0px; padding: 0px; display: inline; line-height: normal; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; position: relative...