®

PORTABLE GASOLINE GENERATORS

STANDBY INSTALLATION TO HOME OR BUILDING

WARNING: Have standby in- stallation performed by a skilled, licensed electrician. Do not let anyone else wire into a utility circuit. Personal injury, equip- ment damage, or damage to home could occur.

IMPORTANT: This generator will not power your entire home. Most home utility electric service is more than 60 amps. This will exceed generator output. Only power needed items during a power outage. Make sure total wattage of electrical load does not exceed rated wattage of generator.

1.Make two lists of items you want pow- ered 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 ex- cept motors. The light bulb or appli- ance nameplate lists its wattage. Re- member, 1KW = 1000 watts. Note: The nameplate 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 nameplate states 3 amps at 120 volts. 3 amps x 120 volts = 360 watts.

3.Electric motors present a special prob- lem. They require up to three-times their rated wattage to start. Chart 2, below, shows starting watts for differ-

ent size motors. For example: an elec- tric 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 re- quire 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 the rated wattage of your generator. It is a good idea to have up to 25% extra capacity for future needs or extra equipment.

You may need to use this generator as a standby power source. During a power out- age, the generator will power selected items in a building. Have generator and additional wiring installed by a skilled, licensed elec- trician. This is not a do-it-yourself job. Fol- low all local codes.

WARNING: The electrician must install a double-throw trans- fer switch. This isolates existing electrical circuits from the utility power line. If not isolated, gen- erator output will back-feed into utility power line. This may elec- trocute a power company line repair person.

DETERMINING ELECTRICAL LOAD FOR GENERATOR

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 rated watt- age of generator. For rated wattage of your generator, see Specifications, page 5. Elec- tric motors present a special problem when figuring load. Read Step 3 carefully.

Chart 1 - Typical Electric Appliance Wattages

 

Running

Starting

 

Running

Starting

Equipment

Watts

Watts

Equipment

Watts

Watts

 

 

 

 

 

 

Light bulb (100W)

100

100

1/2" Drill

1000

1250

Radio

150

150

Toaster

1200

1200

Fan

200

600

Coffee maker

1200

1200

Television

400

400

Skillet

1200

1200

Furnace fan (1/3 hp)

 

 

14" Chain saw

1200

1500

with blower

600

1800

Water well pump

 

 

Vacuum cleaner

600

750

(1/2 hp)

1000

3000

Sump pump (1/3 hp)

700

2100

Hot plate/range

 

 

Refrigerator/freezer

800

2400

(per burner)

1500

1500

6" Circular saw

800

1000

10" Table saw

2000

6000

Floodlight

1000

1000

Water heater

 

 

 

 

 

(storage-type)

5000

5000

 

 

 

 

 

 

Chart 2

 

 

Approximate Starting Watts*

 

 

 

 

 

 

 

Motor

Approximate

Universal

Repulsion

 

Split

HP

Running

Motors

Induction

Capacitor

Phase

Rating

Watts

(small appliance)

Motors

Motors

Motors

 

 

 

 

 

 

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 horsepower are not generally used.

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Desa RGH3000PR, RGH5500IE Standby Installation to Home or Building, Determining Electrical Load for Generator

RGH3000, RGH5500IE, RGH5500, RGH3000PR specifications

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