Fill in the
appliance description and other data in the appropriate boxes. Appliance loads include lights (individual
bulbs), television, radios, microwave, electronics, etc. If you have the wattage information available
simply fill in the “Running watts” box with that figure. The calculation for motors is on the second
chart. Both charts must be added
together to correctly find the answer for the size of the generator needed.
Description of Appliance
|
Volts
|
|
Amps
|
|
Running
Watts
|
|
Starting
Watts
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
|
|
x
|
|
equals
|
|
x1=
|
|
Total
appliance running and starting watts
|
|
|
|
|
|
Next, you
need to look at all the motors that run in your house. These motors are used in air conditioners,
heat pumps, furnaces, freezers, refrigerators washers, dryers, water pumps,
etc.
Description of Motor
|
Volts
|
|
Amps
|
|
Running
Watts
|
|
Starting
Watts
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
|
|
x
|
|
equals
|
|
x3=
|
|
Total
motor running and starting watts
|
|
|
|
|
|
|
Now, you
need to combine the results from both charts for total running and starting
watts
|
Running
Watts
|
|
Starting
Watts
|
Total Appliance
Watts
|
|
|
|
Total Motor
Watts
|
|
|
|
Total
|
|
|
|
Total motor and appliance RUNNING
watts—should not
exceed 90% of the generator rating
Total motor and appliance STARTING
watts—should not
exceed 150% of the generator rating
Total motor and
|
|
Number of
|
|
|
appliance
|
|
watts
|
|
Estimated KW
|
RUNNING watts
|
|
|
|
|
|
|
|
Divided by
|
|
|
x .90=
|
|
1000
|
|
|
|
|
|
|
|
|
|
|
|
Total motor and
|
