Generator Capacity - Briggs & Stratton 30677 Operator's Manual

120/240 Volt AC, 30 Amp, Locking Receptacle
Use a NEMA L14-30 plug with this receptacle. Connect a
4-wire cord set rated for 250 Volt AC loads at 30 Amps.
The generator's locking receptacle is not protected by a
GFCI.
4-Wire Cord Set
Y (Hot)
NEMA L14-30
This receptacle powers 120/240 Volt AC, 60 Hz, single
phase loads requiring up to 5,000 Watts of power (5.0 kW)
at 20.8 Amps for 240 Volts or two independent 120 Volt
loads at 20.8 Amps each.

Generator Capacity

To make sure your generator can supply enough running
watts and starting watts for the items you will power at the
same time, follow these simple steps:
1. Select the items you will power at the same time. See
following list for typical wattages.
Tool or Appliance
Light Bulb - 75 Watt
Sump Pump
Refrigerator/Freezer
Water Well Pump - 1/3 HP
Window AC - 10,000 BTU
Furnace Fan Blower - 1/2 HP
Microwave Oven - 1000 Watt
Color Television - 42"
Personal Computer w/17" monitor
Garage Door Opener - 1/2 HP
* Typical wattages listed are approximate only. Check tool
or appliance for actual wattage.
240V
120V 120V
W (Neutral)
X (Hot)
Ground (Green)
Running Starting
Watts* Watts
75 -
800 1200
800 2000
1000 2000
1200 1800
800 1300
1000 -
280 -
800 -
480 520
2. Total the running watts. This is the amount of power
your generator must produce to keep your items
running. See following example:
Example
Tool or Appliance
Window air conditioner
Refrigerator
Television
Light (75 Watts)
Total running watts
Highest starting watts
Total generator watts required
3. Estimate the starting watts you will need. Because not
all motors start at the same time, total starting wattage
can be estimated by adding only the item with the
highest additional starting watts requirements to the
total running watts from step 2.
Power Management
To manage generator power, sequentially add loads as
follows:
1. With nothing connected to generator, start the engine
outdoors.
2. Plug in and turn on the first load, preferably the largest
load you have.
3. Permit the generator output to stabilize (engine runs
smoothly and attached device operates properly).
4. Plug in and turn on the next load.
5. Again, permit the generator to stabilize.
6. Repeat steps 4 and 5 for each additional load.
Never add more loads than the generator capacity. Take
special care to consider surge loads in generator capacity.
Step 5: Generator Shutdown
1. Turn off and unplug all electrical loads from generator
panel receptacles. Never stop engine with electrical
devices plugged in and turned on.
2. Let engine run at no-load for one minute to stabilize
internal temperatures of engine and generator.
3. Push engine switch to off (0) position.
4. Move fuel valve to off (0) position.
Operation
Running Watts Starting Watts
1200 1800
800 2000
280 —
75 —
2355 Total 2000 Highest
Running Watts Starting Watts
= 2355
= 2000
= 4355
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