Like it or not, the use of 110, 220, 440, is ignorant as they are obsolete voltages & if you don't know what you are working on, you really have no business doing electrical.
As to dropping 120 volts, you can blame that on Edison's 110V, DC, when Tesla, & Westinghouse were introducing alternating current, Edison's DC was only supplying lighting & incandescent lamps did not care if if it was AC, or DC, they had to match the 110V being supplied by Edison's grid, so when the rest of the world was ready to electrify, 110V was a legacy system here, & they went with AEG's 220V system, 415Y/240V would be much simpler, but that ship sailed long ago.