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Briggs & Stratton Power Products Automatic Transfer Switch
Installation and Owner’s Manual
ESSENTIAL CIRCUIT
ISOLATION
Essential electrical loads are loads that will be powered by
the Home Generator System. Essential loads are grouped
together and wired into the transfer switch.
TO THE INSTALLER: Consult with Home
Generator System owner(s) to discuss their
“Selection of Essential Circuits”, described in the
owner’s manual.
Ensure that the total of the selected load circuits fed by this
transfer switch are within the generator's rated capacity.
The following requirements apply to this type of isolation
system:
• The Automatic Transfer Switch is installed after the main
distribution panel.
• The Automatic Transfer Switch has a load rating of
50 Amps.This is the maximum load rating of the essential
loads.
All wiring must conform to national, state and local codes.
The illustration in Figure 1 depicts the Home Generator
System and assumes the utility is supplying 120/240Volt,
single-phase electrical service.
Figure 1 — Typical System Diagram with Essential Circuits
To Utility Power
Watt Meter
Main Distribution Panel
To Air Conditioner (240V)
To Other Circuits (120V)
To Range
To Water Heater
240V
To Briggs & Stratton
Home Generator Unit
120V To Microwave
120 V To Bathroom
240V To Well Pump
120V To Sump Pump
Neutral
120V
To Furnace Blower
To Lights
To Refrigerator
120V To Freezer
Automatic Transfer Switch
(in normal position)