Wednesday, February 23, 2011

Electrical Knowledge: Did You Know ??

Someone e-mail to me about electrical usage at house. Just want to share with you all. Anyway, have you forgotten how to calculate electricity bill ?

Here is a simple example to help you calculate electricity consumption. Let's assume you have one 100watt light bulb switched on for one hour. This will consume 100 watts per hour or 0.1 kilowatt hours (a kilowatt being 1000 watts). If you had ten 100watt light bulbs switched on for one hour your consumption would therefore be 10 x 100watts = 1000watts which is 1 kWh. You could then look at your electrical suppliers rate per unit (kWh) and see what the actual costs incurred are.

Do you know what contributes to your monthly electricity bill?
For those in Semenanjung Malaysia, TNB’s tariff is approximately 30 sen to 45 sen per kilowatt-hour (kWh), depending on your usage. The more you use, the more expensive the rates!
Below is a short table of common electrical appliances, and a rough estimate on how much they cost to run for every hour.

(The cost may seem low, but remember, even using 3 sen/hour means that you will be paying about RM 20 a month if you leave it on for 24 hours a day!)

Estimated cost (sen/hour)
Fluorescent lights
1 sen
Wireless Router
1 sen
ASTRO decoder + dish
2 sen
Table Fan
2 sen
Incandescent lights
3 sen
Ceiling Fan
3 sen
Computer (laptop)
5 sen
CRT (‘normal’) TV (21 inch)
3 sen
LCD TV (32 inch)
7 sen
Computer (desktop)
9 sen
Plasma TV (42 inch)
10 sen
Washing Machine
15 sen
Vaccuum Cleaner
17 sen
Electrical Clothes Iron
33 sen
Electric Hot Plate
46 sen
Air Conditioning
46 sen
Electric Water Kettle
50 sen

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