closed the tv 60 and the microwave 62 are on different circuits and the relative differences in the resistive loads are inconsequential to the operation of the tv 60 and the microwave 62 turning now to fig3 b an open neutral circuit 70 inside the rv the same four lines l 1 72 l 2 74 neutral 76 and ground 78 provide power to the rv however because of the problem with the connection to the utility power the neutral 76 is open a tv 80 and a microwave 82 are in the rv and powered by the circuit 70 in this example the tv 80 is connected between the l 1 line 72 and the open neutral 76 the microwave 82 is connected to the l 2 line 54 and the neutral 56 the resistive loads for the tv 80 and the microwave 82 are 1 kw and 10 kw respectively when the neutral is open the tv 80 and the microwave 82 are on the same circuit and the relative differences in the resistive loads change the voltage drop across the loads power cannot flow from the l 1 line 72 and the l 2 line 74 to neutral 76 instead the power flows from l 1 line 72 to the l 2 line 74 and the voltage drop between l 1 line 72 to the l 2 line 74 will be 240 vac because the loads are in series the voltage drop across the tv 82 and the microwave 84 will total 240 vac thus the.