what does the power rating on the appliances indicate?

Answer 1

=Typical Power Ratings for Appliances=

We have provided a list of many of appliances and their typical power ratings (in Watts). You can use this information to help you estimate to total amount of Watt*Hours that your alternative energy system needs to supply on an average day. Power ratings of most appliances are usually listed on the appliance itself or its manual.

For a final calculation of your watt*hour usage, we recommend that you look at each appliance to be powered to find it rated power. We also offer meters (Brand Power Meter and the Kill A Watt Power Meter) which are specifically designed to measure how much power an appliance consumes. For detailed specifications on the Brand 1850W model, click here, or for the Kill A Watt Meter click here.

When determining how many Watt x Hours you're appliances will use keep in mind that many of the appliances that you might use will only be run for an average of a few minutes per day. For instance a 500W weed eater may be used for 1 hour every week. That translates to an average of 71Watt*Hours per day (500W / 7 Days).

Also, there are appliances like refrigerators which although appear to be "on" all day, actually are running between 12 to 15 hours a day (turning off and on as needed).

Finally, be aware of "ghost loads". These are devices that people commonly forget to include in their calculations. These devices typically consume a small amount of energy (<1W) but are running 24 hours a day. Examples of typical ghost loads would be AC adapters, clocks, VCRs, TVs, microwaves and printers. Many of these devices require power to maintain their clocks running (e.g. VCR, TV and microwave). Although the amount of energy consumed on an hourly basis is small, the fact that they run all day can easily add as much as 100W*Hrs per day.

Answer 2

It is used to calculate circuit loading.

For instance, a 110 volt 20 amp circuit can carry 2200 watts of power. If you connect a toaster or a hair dryer to that circuit rated at 1800 watts (for either one), you will use up most of the power available with that one appliance. Connecting another appliance to the same circuit where the appliance is rated at more than 400 watts will eventually cause the circuit breaker to open if both appliances are running at the same time.

Answer 3

Most appliances are rated in watts (Microwave and toaster ovens) and/or amps (washers, dryers, refrigerators, etc). Wattage is useful when rating the relative power of an appliance but the amps it uses is more important. You need to be aware that most household circuits only supply 20-30 amps of current. For example, I have a microwave that draws about 14 amps and a toaster oven that uses 15; if I tried using both at the same time my 20 amp circuit breaker trips. I have them on separate branch circuits and now they get along fine.

Answer 4

Power rating indicate it maximum capacity, exceeding this power will cause equipment to burn or destroy.