**How do I know what size generator I need?****What are some common kW ratings for home electrical devices?****What are the fuels generator use****How many types of generators systems are there****What's the difference in the types of generators systems**

**How do I know what generator I need.**

**Application Chart for
Determining Electrical Load for Generator** Remember 1 kW = 1000 watts 2 kW = 2000 watts
and so on The formula for finding wattage is: Volts x
Amps = Watts Example: an appliance nameplate states 3 amps at
120 volts. 3 amps x 120 volts = 360 watts **Typical
Electrical Appliance Wattage's**

Application / Equipment | Running/Rated Watts |
Starting/Surge Watts |

Light Bulb (100w) | 100 | 100 |

Radio AM/FM | 50-200 | 50-200 |

Radio, CB | 50 | 50 |

Fan | 200 | 600 |

Television | 300-400 | 300-400 |

Microwave Oven | 700 | 1000 |

Air Conditioner (12,000 BTU) | 3250 | 5000 |

Furnace Fan (1/3 hp blower motor) | 600 | 1800 |

Vacuum cleaner | 600 | 750 |

Sump pump (1/3 hp) | 700 | 2100 |

Refrigerator/freezer | 800 | 2400 |

Deep Freezer | 500 | 1500 |

Circular saw | 1000-2500 | 2300-4600 |

Circular saw 6" | 800 | 1000 |

Floodlight | 1000 | 1000 |

Drill 1/2" Electric | 1000 | 1250 |

Toaster | 1200 | 1200 |

Coffee maker | 1200 | 1200 |

Skillet | 1200 | 1200 |

Chain saw 14" Electric | 1200 | 1500 |

Water well pump (1/2 hp) | 1000 | 3000 |

Hot plate/range (per burner) | 1500 | 1500 |

Table saw 10" | 2000 | 6000 |

Water heater (storage type) | 5000 | 5000 |

12V DC Battery Charger | 120 | 120 |

**Electric Motor Wattage Usage** Electric motors present a special problem. They
require up to three times their rated wattage to start. Example:
an electric motor name plate states 5 amps at 120 volts, 5 amps x 120 volts = 600 watts.
Multiply this by 3. This will show the starting watts needed. 600
watts x 3 = 1800 watts to start. Some motor name plates will
show starting watts higher in some case 9 times higher, check the name plate.

******** | ******** |
Approximate Starting Watts * |

*** - Always use starting watts,
not running watts, when figuring correct electrical load**

Motor HP Rating |
Approximate Running Watts |
Universal Motors (small appliances) |
Repulsion Induction Motors |
Capacitor Motors |
Split Phase Motor |

1/8 | 275 | 400 | 600 | 850 | 1200 |

1/4 | 400 | 500 | 850 | 1050 | 1700 |

1/3 | 450 | 600 | 975 | 1350 | 1950 |

1/2 | 600 | 750 | 1300 | 1800 | 2600 |

3/4 | 850 | 1000 | 1900 | 2600 | x |

1 | 1000 | 1250 | 2300 | 3000 | x |

1-1/2 | 1600 | 1750 | 3200 | 4200 | x |

2 | 2000 | 2350 | 3900 | 5100 | x |

3 | 3000 | x | 5200 | 6800 | x |

*** - Always use starting watts, not running watts, when figuring correct
electrical load** **x - Motors of higher horse power are
not generally used**

What are the fuels that generators use.

The 4 fuels are gasoline, diesel,/ and propane & natural gas which are the preferred fuels for automatic systems & diesel for all portables

**How many types of generators
systems are there**

There are 3 main types

Note: Portable Type units require

Copyright © [Pepe Electric L.L.C]. All rights reserved.

Revised: September 30, 2010.