I want to make a very powerful one stage solenoid. The pipe is only so long , so if I wrap the wire evenly I will only acheive a fixed number of turns. If I wrap the same wire of that one with the current flowing in the same directon I should get twice as many turns altogether. The problem is I dont know how one should wrap more layers of the same strand of wire over the first layer. Do I wrap the wire from one end to the other and then wrap it from that end to the other. Or do I wrap it from 1 end to the other and then wrap a new wire over that and simply connect the same charge ends together?