Master Lock MGH3000PR, MGH4000C Operation, General Information, Using Receptacle, Chart

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PORTABLE GASOLINE GENERATORS

DETERMINING ELECTRICAL LOAD FOR GENERATOR

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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 except motors. The light bulb or appliance name- plate lists its wattage. Remember, 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 problem. They require up to three-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 fig- ure. 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 the rated wattage of your generator. It is a good idea to have up to 25% extra capacity for future needs or extra equipment.

OPERATION

GENERAL INFORMATION

This generator is not large enough to power your entire home. Do not connect generator to any existing electrical circuits. Plug items directly into generator receptacles. Do not exceed amperage rating of receptacles. Only use grounded cords.

DANGER: Use only in well- vented areas. Make sure area has plenty of free-moving, fresh, out- side air. Never run generator in an enclosed or confined area. Never run generator inside occu- pied building. Engine exhaust contains poisonous carbon mon- oxide gas. Overexposure will cause loss of consciousness and will lead to death.

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	Coffee maker	1200	1200
600			Skillet	1200	1200
Television	400	400	14" Chain saw	1200	1500
Furnace fan (1/3 hp)			Water well pump
with blower	600	1800	(1/2 hp)	1000	3000
Vacuum cleaner	600	750	Hot plate/range
Sump pump (1/3 hp)	700	2100	(per burner)	1500	1500
Refrigerator/freezer	800	2400	10" Table saw	2000	6000
6" Circular saw	800	1000	Water heater
Floodlight	1000	1000	(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	500	625	1100	1500	2250
1/4	700	875	1550	2100	3150
1/3	800	1000	1750	2400	3600
1/2	1100	1375	2400	3300	4950
3/4	1400	1750	3100	4200	x
1	1700	2125	3750	5100	x
1 1/2	2100	2625	4620	6300	x
2	2450	3075	5400	7350	x
3	3600	x	7900	10800	x

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

DANGER: Never connect gen- erator to any existing electrical circuits. The generator output will back-feed into the utility power line. This may electrocute a power company line repair person. Also, if generator is powering electri- cal circuits, the chance of an elec- trical fire exists.

Note: We supply the engine owner’s manual with generator. Refer to that manual for questions concerning engine operation.

USING RECEPTACLE

Note: Do not exceed amperage rating of receptacles. Exceeding rating will trip re- ceptacle circuit breaker.

Use receptacles properly. Improper use could damage generator. Use only grounded exten- sion cords. Power only grounded or double- insulated items. Do not overload receptacles. All generators (except models HWI3000, MGH3000, and MGH3000PR) have the fol- lowing receptacles (see Figure 15):

•120V, 15-amp GFCI duplex receptacle

•120V, 30-amp twist-lock receptacle

•120/240V, 20 or 30-amp twist-lock receptacle

•120V, 15-amp duplex receptacle

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