What is the difference between loop terminal and line taps
Taps provide two or more voltages or are used to make adjustments to a nominal voltage to adapt to local line conditions. All taps work by essentially changing the primary to secondary winding ratio which dictates the input to output voltage ratio.
The coil's conductor is bent into a loop on the outside of the conductor and used to mount the tap conductor. This is a simple, cost effective method which doesn't involve heating the wire to braise a terminal pad.
Sometimes referred to as lug taps, are created when a landing pad is braised onto a point in the coil to mount the tap conductor. This must be done with foil windings or typically when three or more conducting wires form the winding.
Most taps are on the line side and primary coil of the transformer. This is typically the outer coil.