Three phase line or phase voltage?

[Raghav Gupta]

Homework Statement

Three loads Z_A = 10∠0° Ω; Z_B = 15∠-30° Ω and Z_C = 20∠45° Ω are connected in star across a balanced, 3 phase, 400 V, RYB supply. Determine (a) line currents (b) Phase Voltages (c) Neutral shift voltage, VON

Homework Equations

The Attempt at a Solution

My query is that in question I am taking 400 as rms phase voltage of supply but I saw the solution and they have done by considering that voltage as line to line rms voltage, why that is so?
Later we should also multiply voltage by√2 but are we required to keep the solution in rms only?

 

[NascentOxygen]

By convention, 3 phase supplies are described by their line voltage, i.e. the voltage between any pair of phases.

By convention, AC supplies are always described by the RMS value of their sinusoidal waveform.