It's about running large and expensive cable for long distances to get the 120V at the amperage you want without a huge voltage drop at the end of the line. If your voltage drop is too much, your amperage will increase. Still the same watts, but you can over amp things and cause potentially deadly issues.
It's less expensive to pop a transformer in at the end of a long run with the higher voltages. Ground at the point, transformer provides the neutral for 120V. If not, you need to run the larger cables due to potential.
Last edited by JKB; 05/30/15 02:25 AM.
