Home | US Forest Service

Jun 17, 2002 · 277/480, 3 phase, 4W- This voltage is usually used on large systems to reduce incoming service size, wire size and distribution equipment size. Fluorescent and other discharge lighting can be used at 277 volts. 480 volt single phase, 480V three phase, and 277 volt single phase loads can be used on this system. ................
................