MASTER LOCK MGY5000 Manuale Utente

18

You must decide what electrical load your generator can power. Do this before
using generator. Use the following four-step method. It will help you select a load
that is not too large. Make sure total wattage of all electrical loads does not exceed
5000 watts. Electric motors present a special problem when figuring load. Read
Step 3 carefully.

1. Make two lists of items you want powered by generator. List all motors and

motor-powered appliances in one. List all lights, small appliances, etc. in the other.
For standby service to home or building, only include items you must power.

2. Enter running watts of each item except motors. The light bulb or appliance

nameplate lists its wattage. Remember, 1KW = 1000 watts. 

Note:

 The name-

plate may not list wattage. It may only list volts and amps. The formula for
finding wattage is: Volts x Amps = Watts. For example: An appliance name-
plate states 3 amps at 120 volts. 3 amps x 120 volts = 360 watts.

3. Electric motors present a special problem. They require up to 3-times their

rated wattage to start. Chart 2, below, shows starting watts for different size
motors. For example: an electric motor nameplate states 5 amps at 120 volts. 5
amps x 120 volts = 600 watts running. Multiply this figure by 3. This will
show the starting watts needed. 600 watts x 3 = 1800 watts to start. When
figuring the generator load for motors, you must use the starting watts figure.
Do not use the running watts figure. 

Note:

 Some motors require nearly the

same wattage to run as to start. These items include saws, drills, hair dryers,
and food mixers. See Chart 1 for typical appliance wattage examples.

4.

Add watts and starting watts of all items. This total must not be larger than 5000 watts.
It is a good idea to have up to 25% extra capacity for future needs or extra equipment.

* – Always use starting watts, not running watts, when figuring correct electrical load.
x – Motors of higher horsepower are not generally used.

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

x

x

Light bulb (100W)

100

100

Radio

150

150

Fan

200

600

Television

400

400

Furnace fan (1/3 hp)

600

1800

Vacuum cleaner

600

750

Sump pump (1/3 hp)

700

2100

Refrigerator/freezer

800

2400

6" Circular saw

800

1000

Floodlight

1000

1000

1/2" Drill

1000

1250

Toaster

1200

1200

Coffee maker

1200

1200

Skillet

1200

1200

14" Chain saw

1200

1500

Water well pump

(1/2 hp)

1000

3000

Hot plate/range

(per burner)

1500

1500

Water heater

5000

5000