I'm having trouble every time I work problems #110 and #121!
the big picture as I understand is:
S(3phase)=3*V(phase)*I(phase) ------> I=S/V(phase)
or
S(3phase) = sqt*3 *V(L-L) *I(L)-------> I= S/sqt*3 *V(L-L)
so ,on #110: why they calculated Ic which is I(phase) =S/V(L-L)???? without...