I just want to know if my method is correct in answer a question like this... Three impedances z1=(2-j5), z2=(3+j4) and z3=(8+j0) are connected in delta to a 3 phase, 400v 50Hz supply. 1. Find the three line currents Ia, Ib and Ic 2. Find the S,P and Q and power factor for the load 3. If the nodes are now connected in star with a neutral connected, find the current in the neutral wire. I'm on question 3 and I just want to know if this is the correct method to work it out: 1. Work out Yan, Ybn and Ycn. 2. Work out Vn'n using the equation Vn'n=(VanYan)(VbnYbn)(VcnYcn)/Yan+Ybn+Ycn 3. Work out the new phase voltages by doing Van'=Van-Vn'n , Vbn'=Vbn-Vn'n , Vcn'=Vcn-Vn'n 4. Work out the new phase currents by doing Ian'=Van'/Zan' , Ibn'=Vbn'/Zbn' , Icn'=Vcn'/Zcn' 5. Add all the new phase currents up and that'll give me the current in the neutral? Is that the correct method to work it out? Have I did a step wrong or missed anything out?