Table 2 Household electric appliances and their hours of usage
Appliance | Power rating (W) | Number of consumer class | Hours/day | Period of use | ||
|---|---|---|---|---|---|---|
| Â | Â | Lower-class | Middle-class | Upper-class | Â | Â |
Bulb | 15 | 3 | 4 | 5 | 12 | 6Â pm to 6 am |
Radio | 20 | 1 | 1 | 1 | 4 | 7Â pm to 11Â pm |
Mobile phone | 10 | 3 | 3 | 3 | 3 | 4Â pm to 7Â pm |
Television | 250 | – | 1 | 1 | 3 | 7 pm to 10 pm |
Fan | 75 | – | 1 | 2 | 8 | 8 pm to 4 am |
Refrigerator | 440 | – | – | 1 | 24 | 6 am to 6 am |
Decoder | 45 | – | 1 | 1 | 3 | 7 pm to 10 pm |