Answer Happy

1.2 A small rural community has 15 houses clustered together, each connected to a 16kVA single phase supply at 240V. The typical load variation during the day of this community per house is as shown in Table 1 below. The electricity account for this community is paid by the community leader, who wants to know which tariff is cheaper between Landrate 1 and Landrate 4 tariffs as shown on table 2. Determine the combined monthly account for this community on both tariffs and suggest the tariff they should use and why. Assume a 30-day billing month. [10] Table 1 Time 00h00- 05h00- 07h00- 17h00- 21h00-00h00 period 05h00 07h00 17h00 21h00 Energy used 2.5 kWh 4 kWh 2.5 kW 12 kW 2.5 kW Table 2 Tariff Network charge Service charge Energy charge per per day per day kWh Landrate 1 = R5,62+VAT 26,56c+VAT R5,91+VAT R6,74 II R6,41 30,28c II Landrate 4 R4,71+VAT R5,37 Not applicable 53,09c+VAT 11 60,52c 2. Note: • The service and network charges are payable for each premise per billing month whether electricity is used or not. • The service charge on landrate 4 is not charged as a fixed charge per month but is included in the energy charge [25]