1. Measuring Your Electricity Consumption

2. Procedure Using a power meter, record the KW used by the equipment 6 times, once every 10 seconds. Using a power meter, record the KW used by the equipment 6 times, once every 10 seconds. Obtain the average of these readings. Obtain the average of these readings. Multiply the average by the number of hours you use the equipment every day to get kWh. Multiply the average by the number of hours you use the equipment every day to get kWh.

3. Example: My Nightstand Lamp Readings: 10 sec: 37.5 W 20 sec: 37.1 W 30 sec: 37.3 W 40 sec: 37.1 W 50 sec: 37.3 W 60 sec: 37.1 W Average (ignore the highest and the lowest values to eliminate extremes): (37.1 + 37.3 + 37.1 + 37.3) / 4 = 37.2 W Usage: 4 hours/day Electricity: 37.2 * 4 / 1000 = 0.149 kWh/day

4. Your turn

5. Other Equipment You May Have Cable Box: Off = 20.65 W Cable Box: Off = 20.65 W On = 20.78 W On = 20.78 W TV : Off = 4.5 W TV : Off = 4.5 W On = 55.75 W On = 55.75 W VHS: Off = 3.25 W VHS: Off = 3.25 W On = 12.13 W On = 12.13 W DVD: Off = 0 W DVD: Off = 0 W On = 11.6 On = 11.6 Discman with Speakers: Off = 2.85 W Discman with Speakers: Off = 2.85 W On = 5.88 W On = 5.88 W

6. So, how much electricity do you use in your room?

7. Some Statistics In 2001, per capita electricity consumption in: The US: 12,406 kWh (33.99 kWh/day). The US: 12,406 kWh (33.99 kWh/day). Colombia (SA): 955 kWh (2.61 kWh/day). Colombia (SA): 955 kWh (2.61 kWh/day). France: 6,900 kWh (18.91 kWh/day). France: 6,900 kWh (18.91 kWh/day). Canada: 15,661 kWh (42.9 kWh/day). Canada: 15,661 kWh (42.9 kWh/day). Japan: 7,579 kWh (20.76 kWh/day). Japan: 7,579 kWh (20.76 kWh/day). China: 1019 kWh (3.06 kWh/day). China: 1019 kWh (3.06 kWh/day). From: www.nationmaster.com