## 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.

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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!)

 Appliance 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