Electrical Power Requirements of Different Processes

Pretty obviously, different electrical devices need different amounts of electrical power. Generally:

  • Devices that heat consume the most power.

  • Devices that produce motion consume less.

  • Devices that produce light consume less still.

  • Devices that produce sound consume least.

The above are general. A high powered speaker or a blender for example, may consume more power than a power saving light bulb. The power requirements of some common appliances are shown below. Notice that some devices consume power to produce more than one of the above – heat is always a by product.

Heating Appliances

Power Consumed (Watts)

Hot Plate

1200

Coffee Maker

800

Dishwasher

1300

Iron

1000

Toaster

1000

Microwave

750

Washing Machine

500

Devices that Produce Motion


Blender

300

CD Player

20

Printer

100

Table Fan

20

Drill

1000

Disc sander

1200

Vacuum Cleaner

1400

Devices that Produce Sound


Clock Radio

1

Stereo

30

Others


Light Appliances


CRT Television

200

Incandescent Light Bulb

100

Efficient Light Bulb

20

Others


Laptop

50

Desktop PC

300

Satellite Dish

30

VCR

40

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