North Star M165938N Manuale Utente

Power Load Planning & Management (cont’d) 

 

 

12

Freezer 

800 (b) 

Submersible pump (1 HP) 

2000 (a) 

Hair dryer 

1200 

Submersible pump (1/2 HP) 

1500 (a) 

Hand drill (1”) 

1100 

Sump pump 

600 (a) 

Hand drill (1/2”) 

875 

Table saw 

2000 (a) 

Hand drill (3/8”) 

500 

Television 

500 

Hand drill (1/4”) 

250 

Toaster 

1000 

Hedge trimmer 

450 

Vacuum cleaner 

250 

Home computer 

150 

VCR 

70 

Impact wrench 

500 

Water Heater 

3000 

  

Weed 

trimmer 

500 

(a) Hard-starting motors require 3-5 times the rated running watts 
(b) For extremely hard to start loads such as air conditioners and air compressors, consult the equipment 

dealer to determine maximum wattage

 

 

 

1.  Make a list of all electrical devices you will be powering at the same time with the generator. 
2.  List the greater of the running or starting wattage next to each device as obtained from the 

devices’ nameplate or Table 1.  If only the running wattage for a device with an electric 
motor is known, the starting wattage can be estimated to be at least 3 times the running 
wattage. 

3.  Add the wattages for all devices on your list.  This total must be lower than the continuous 

output rating of your generator.  

 

 

  Light Bulb 

75 W 

  Refrigerator – 18 Cu. Ft. 

1600 W 

  Microwave  

700 W 

  Window AC 

1800 W 

  Sump pump (1/3 hp) 

2100 W 

 

In this example, the generator must have a continuous output of at least 6275 W in order to power all 
of the devices simultaneously. 

You can increase the number of devices your generator can power by staggering the load on the 
generator.  For example, you could alternately power your refrigerator and air conditioner for 
limited periods of time -- powering only one of the devices at a time and never powering both at the 
same time.