Who was volt?
Not "Volt" - but "Volta". The unit "volt" was named Alessandro Volta.
let me clear difference between phase voltage and line voltage. phase voltage is measure line to neutral and line voltage is measure line to line. there is correct answer that 380 volt is sum of multiply of square root 3 to phase voltage 220 volt. phase volt line volt 220 volt x 1.732 = 381 volt 230 volt x 1.732 = 400 volt 240 volt x 1.732 = 415 volt M. Asif ALi