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Briggs & Stratton Power Products Backup Power System
Owner’s Manual
7
Essential Circuit Selection
When selecting the essential circuits that will be switched
to “Backup Power,” it is important that the sum of the
combined circuit loads does not exceed the
wattage/amperage capacity of the generator.To help you
with your selection of essential circuits, please consider the
following:
Add up the total wattage of all electrical devices to be
connected at one time.This total should NOT be
greater than the generator’s wattage capacity.
The rated wattage of lights can be taken from light bulbs.
The rated wattage of tools, appliances and motors can
usually be found on a data plate or decal affixed to the
device.
If the appliance, tool or motor does not give wattage,
multiply 120 Volts times the ampere rating to determine
watts (Volts x Amps = Watts).
Some electric motors (induction types) require about
three times more watts of power for starting than for
running.This surge lasts for only a few seconds. Be sure
you allow for this high starting wattage when selecting
electrical devices that will be energized by the backup
power system:
Figure the watts required to start the largest motor.
Add that to the total running watts of all other
connected loads.
This Briggs & Stratton Backup Power System
complies with the following “stationary standby
power rating”:
The standby power rating is applicable for supplying
emergency power for the duration of normal power
interruption. No sustained overload capability is available
for this rating.
This rating is applicable to installations served by a
reliable normal utility source.This rating is only applicable
to variable loads with an average load factor of 80% of
the standby rating for a maximum of 500 hours of
operation per year.The standby rating is only applicable
for emergency and standby power where the generator
set serves as the backup to the normal utility source.
Use the “Wattage Reference Guide” provided and mark
those circuits you consider “critical” or “essential”. Make
sure you and your installer consider the system’s altitude
above sea level and the ambient temperature range when
determining total generator load.
Device
Running
Watts
Air Conditioner (12,000 Btu)* 1700
Air Conditioner (24,000 Btu)* 3800
Air Conditioner (40,000 Btu)* 6000
Battery Charger (20 Amp) 500
Circular Saw (6-1/2") 800 to 1000
Clothes Dryer (Electric)* 5750
Clothes Dryer (Gas)* 700
Clothes Washer* 1150
Coffee Maker 1750
Compressor (1 HP)* 2000
Compressor (1/2 HP)* 1400
Compressor (3/4 HP)* 1800
Curling Iron 700
Dehumidifier* 650
Electric Blanket 400
Electric Range (per element) 1500
Electric Skillet 1250
Freezer* 700
Furnace Fan (3/5 HP)* 875
Garage Door Opener* 500 to 750
Hair Dryer 1200
Hand Drill 250 to 1100
Iron 1200
Jet Pump* 800
Light Bulb 100
Microwave Oven 700 to 1000
Milk Cooler* 1100
Oil Burner on Furnace 300
Oil Fired Space Heater (140,000 Btu) 400
Oil Fired Space Heater (30,000 Btu) 150
Oil Fired Space Heater (85,000 Btu) 225
Radio 50 to 200
Refrigerator 700
Slow Cooker 200
Submersible Pump (1 HP)* 2000
Submersible Pump (1/2 HP)* 1500
Submersible Pump (1-1/2 HP)* 2800
Sump Pump* 800 to 1050
Table Saw (10")* 1750 to 2000
Television 200 to 500
Toaster 1000 to 1650
Figure 3 — Wattage Reference Guide
*Allow three (3) times listed watts for starting device