A three-wire single-phase household circuit is shown in Fig. 9.22a. Use of the lights, stereo, and range for a 24 -hour period is demonstrated in Fig. 9.22b. Let us calculate the energy use over the 24 hours in kilowatt-hours. Assuming that this represents a typical day and that our utility rate is $0.08/kWh, let us also estimate the power bill for a 30 -day month.