Coil of dc machine is made up of one turn or multi turns of the conductor. If the coil is made up of single turn or single loop of conductor, it is called single turn coil. If the coil is made up of more than one turn of conductor, it is referred as multi turn coil. A single turn coil will have one conductor per side of the coil whereas in multi turns coil, there will be multiple conductors per side of the coil. Whatever may be the number of conductors per side of the coil, each coil side is placed inside one armature slot only. That means all conductors of one side of a particular coil must be placed in one single slot only. Similarly, all conductors of other side of the coil are placed in another single armature slot.