how do i fig. out the size generator i need?

Question

if my house uses 1200 watts an hr. how do i fig. out the size generator that i would need to power it , if power is lost. if any one could tell me how i would be greatful. thanks

Answer 1

cHECK HOW MANY CIRCUITS YOU HAVE IN YOUR PANEL.

If you have 6 circuit brakers, then check how much nis being drawn (amperage) through those breakers when everything is on.

If you have a 20 amp circuit breaker drawing 10 amps.

and a 15 amp circuit drawing 7 amps

and a 20 amp circuit breaker drawing 8 amps.

Then add these up.25 amps.
Multiply this by 110 volts, you get 2750 watts.

I would get a 4000 watt generator.

Make sure you add everything, even A/C.
A/C is multiplied by 220v.

35 amps x 220 volt= 7,700 watts.


Good luck

Answer 2

You should decide what appliances, lights, etc are required to be powered from the generator. Some items which have electric motors, such as pumps or refrigerator will require a considerably higher startup current.
Next is to decide on how you wish to connect the generator to the house. Never use a double male plug into the dryer or stove outlet. If needed you can run extension cords throughout the house, but by far the best approach is to install a transfer panel. This will allow you to plug the generator into the house at a special receptacle and throw a couple of breakers to supply electricity to selected existing household circuits. It should be installed by someone qualified, and is not recommended as a do it yourself project.

Read my generator page for more information and ideas.
http://members.rennlist.org/warren/generator.html

Answer 3

If your house uses 1200 watt/hour, then you need a generator that can put out 25% more or 1500 watts/hour.

That is pretty small, I would think you would need more, say a 5 kw generator. I think your load is > 1200 watts/hour. Consider the furnace, freezer, or ac, TV, computer, ect. Add them up.