Pardon me if I stated the title incorrectly/ informally. I just want to say about the title is about the 220 V, 60 Hz source (present in our outlets also) in our house by which comes from nearby electrical post. I have four questions in this post/thread so kindly tell me if I need to edit this so it should contain one (1) question only and write another post/thread for my other questions. 1. What should I call on that 220 V? Service voltage? Secondary Line Voltage?? 2. What is the difference in they what-so-called "Primary Line" and "Secondary Line"? 3. How do I know if the wires passing above me (when I look up/above in the street) is "Primary Line" and "Secondary Line" ? 4. If the 220 V has 2 wires in it and one wire was touched, Do I feel electrocuted? (our outlet has 2 wires, if i split it and touched one of its wire, can I be electrocuted?) Thank You So Much. This is my first post/thread other than my introduction thread.