Briggs & Stratton 1917 Administrator Guide

Home Generator Systems
Installation & Operator’s Manual
Manual No. 192636GS Rev. F (11/01/07)
50 Amp
Automatic Transfer Switch

2BRIGGSandSTRATTON.COM
Briggs & Stratton Power Products Group, LLC
900 North Parkway
Jefferson, WI 53549
Copyright © 2007 Briggs & Stratton Power Products Group,
LLC. All rights reserved. No part of this material may be
reproduced or transmitted in any form by any means without
the express written permission of Briggs & Stratton Power
Products Group, LLC.
Thank you for your purchase of this Briggs & Stratton Power Products Automatic Transfer Switch. This product is intended
for use with Briggs & Stratton Home Standby Generator sets and therefore may not function with generators produced by
other manufacturers. Seek a qualified electrical professional to determine applicability of this equipment to generators aside
from those manufactured by Briggs & Stratton. This is an optional home standby system which provides an alternate source
of electric power and to serve loads such as a gas furnace, refrigeration and communication systems that, when stopped
during any power outage, could cause discomfort, or the like. This product DOES NOT qualify for emergency standby as
defined by NFPA 70 (NEC).
This manual contains safety information to make you aware of the hazards and risks associated with transfer switches and
how to avoid them. Briggs & Stratton has made every effort to provide for a safe, streamlined and cost-effective installation.
Each installation is unique, it is impossible to know of and advise of all conceivable procedures and methods by which
installation might be achieved. We do not know all possible hazards and/or the results of each method or procedure. Save
these instructions for future reference.
This transfer switch requires installation before use. Refer to the Installation section of this manual for instructions on
installation procedures. Only licensed electrical contractors should install transfer switches. Installations must strictly
comply with all applicable federal, state and local codes, standards and regulations.
Where to Find Us
You never have to look far to find Briggs & Stratton support and service for your transfer switch. Consult your Yellow Pages.
There are over 30,000 Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also
contact Briggs & Stratton Customer Service by phone at [phone], or on the Internet at BRIGGSandSTRATTON.COM.
Transfer Switch
Model Number
Revision
Serial Number
Date Purchased

3
FrançaisEspañol
Important Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
For the Home Owner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Owner Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installer Responsibilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Equipment Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Unpacking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Essential Circuit Isolation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mounting Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Power Wiring Interconnections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Testing the Automatic Transfer Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Transfer Switch Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . 14
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Table of Contents

4BRIGGSandSTRATTON.COM
Important Safety Instructions
This is the safety alert symbol. It is used to alert
you to potential personal injury hazards. Obey all
safety messages that follow this symbol to avoid
possible injury or death.
The safety alert symbol ( ) is used with a signal word
(DANGER, CAUTION, WARNING), a pictorial and/or a safety
message to alert you to hazards. DANGER indicates a hazard
which, if not avoided, will result in death or serious injury.
WARNING indicates a hazard which, if not avoided, could
result in death or serious injury. CAUTION indicates a hazard
which, if not avoided, might result in minor or moderate
injury. NOTICE indicates a situation that could result in
equipment damage. Follow safety messages to avoid or
reduce the risk of injury or death.
The manufacturer cannot possibly anticipate every possible
circumstance that might involve a hazard. The warnings in
this manual, and the tags and decals affixed to the unit are,
therefore, not all-inclusive. If you use a procedure, work
method or operating technique that the manufacturer does
not specifically recommend, you must satisfy yourself that it
is safe for you and others. You must also make sure that the
procedure, work method or operating technique that you
choose does not render the transfer switch unsafe.
Save These Instructions
WARNING
Only qualified electricians should attempt installation of
this system, which must strictly comply with applicable
codes, standards and regulations.
WARNING
Failure to properly ground transfer switch can
result in electrocution.
• DO NOT touch bare wires or receptacles.
• DO NOT use transfer switch with worn, frayed, bare or
otherwise damaged wiring.
• DO NOT handle electrical cords while standing in water, while
barefoot, or while hands or feet are wet.
• If you must work around a unit while it is operating, stand on an
insulated dry surface to reduce shock hazard.
• DO NOT allow unqualified persons or children to operate or
service transfer switch.
• In case of an accident caused by electrical shock, immediately
shut down the source of electrical power and contact local
authorities. Avoid direct contact with the victim.
WARNING
Low voltage wire cannot be installed in same
conduit as power voltage wiring.
• Failure to follow above warning could cause personal injury,
damage and/or malfunction of equipment.
WARNING
Transfer Switch contains hazardous voltage that
can cause personal injury or death.
• Despite the safe design of the transfer switch, operating this
equipment imprudently, neglecting its maintenance or being
careless can cause possible injury or death.
NOTICE
Improper treatment of transfer switch can damage it and
shorten its life.
• Use transfer switch only for intended uses.
• If you have questions about intended use, ask dealer or contact
Briggs and Stratton Power Products.
• DO NOT expose transfer switch to excessive moisture, dust,
dirt, or corrosive vapors.
• Remain alert at all times while working on this equipment.
NEVER work on the equipment when you are physically or
mentally fatigued.
• If connected devices overheat, turn them off and turn off their
circuit breaker/fuse.

5
Introduction
Your Briggs & Stratton Transfer Switch is supplied with this
combined “Installation and Operator’s Manual”. This is an
important document and should be retained by the owner
after the installation has been completed.
Every effort has been expended to make sure that the
information in this manual is both accurate and current.
However, the manufacturer reserves the right to change, alter
or otherwise improve the system at any time without prior
notice.
For the Home Owner
To help you make informed choices and communicate
effectively with your installation contractor(s),
Read and understand the Owner Orientation Section
of this manual BEFORE contracting or starting your
transfer switch installation.
To arrange for proper installation, contact the store at which
you purchased your Briggs & Stratton Transfer Switch, your
dealer, or your utility power provider.
The Transfer Switch Warranty is VOID
unless the system is installed by a
licensed electrical professional.
Owner Orientation
The illustrations are for typical circumstances and are meant
to familiarize you with the installation options available with
your transfer switch.
Local codes, appearance, and distances are the factors that
must be considered when negotiating with an installation
professional. As the distance from the existing electrical
service increases, compensation in wiring materials must be
allowed for. This is necessary to comply with local codes and
overcome electrical voltage drops.
The factors mentioned above will have a direct effect on the
overall price of your transfer switch installation.
NOTE: Your installer must check local codes AND obtain
permits before installing the system.
• Read and follow the instructions given in this manual.
• Follow a regular schedule in caring for and using your
transfer switch, as specified in the manual.
Installer Responsibilities
• Read and observe the safety rules.
• Read and follow the instructions given in this manual.
• Check federal, state and local codes and authority
having jurisdiction, for questions on installation.
• Ensure generator is not overloaded with selected loads.
If you need more information about the transfer switch, call
[phone], between 8:00 AM and 5:00 PM CT.
Equipment Description
These new generation transfer switches are intended to
operate compatible electrical loads of normal residential
installations. The load is connected either to utility power
(normal) or home standby power (generator). The transfer
switch monitors utility and generator voltages and will
automatically connect to the appropriate source of power.
Major components of the transfer switch are 2 pole
contactor switches, control circuit board, fused utility
terminals and interconnecting wiring.
The transfer switch is coil-operated from utility or generator
inputs and contains suitable electrical interlock switches to
eliminate the possibility of connecting the utility service to
the generator output. It has ratings capable of switching
generator power into the residence.
The control module circuit board has active circuits sensing
utility and generator voltages. It creates a signal for the
generator start-up, switch transfer, retransfer when utility is
restored and generator cool down periods. The control board
also contains red and green lights indicating the power
sources available.

6BRIGGSandSTRATTON.COM
Installation
Unpacking
Delivery Inspection
After removing the carton, carefully inspect the transfer
switch components for any damage that may have occurred
during shipment.
IMPORTANT: If loss or damage is noted at time of delivery,
have the person(s) making delivery note all damage on the
freight bill and affix his signature under the consignor's
memo of loss or damage. If loss or damage is noted after
delivery, contact the carrier for claim procedures. Missing or
damaged parts are not warranted.
Shipment Contents
• Automatic Power Transfer Switch
• Installation and Operator’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 operator’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 below depicts the Home Generator System
and assumes the utility is supplying 120/240 Volt, single-
phase electrical service.
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)

Mounting Guidelines
The Model 01917 Automatic Transfer Switch is enclosed in a
NEMA Type 1 enclosure suitable for indoor use only. The
Model 01918 Automatic Transfer Switch is enclosed in a
NEMA Type 3R enclosure suitable for indoor/outdoor use.
Guidelines for mounting the Automatic Transfer Switch
include:
• Model 01918 Automatic Transfer Switch must be
installed with minimum NEMA 3R hardware for conduit
connections.
• Install the switch on a firm, sturdy supporting
structure.
• To prevent switch contact distortion, level and plumb
the enclosure. This can be done by placing washers
between the switch enclosure and the mounting
surface.
• Never install the switch where any corrosive substance
might drip onto the enclosure.
• Protect the switch at all times against excessive
moisture, dust, dirt, lint, construction grit and corrosive
vapors.
The typical installation of the Automatic Power Transfer
Switch is depicted below. Discuss layout
suggestions/changes with the owner before beginning the
system installation process.
Power Wiring Interconnections
All wiring must be the proper size, properly supported, of
approved insulation qualities, and protected by NEC
approved conduit.
Complete the following connections between the generator,
transfer switch and main distribution panel (shown on next
page).
1. Connect utility power supply leads from a two pole
breaker installed in the main distribution panel to
transfer switch terminals marked “UTILITY
CONNECTION”. Use a 50 Amp circuit breaker. Ensure
breaker is turned OFF.
2. Connect main distribution panel ground to the transfer
switch “GND” bus.
3. Connect main distribution panel neutral lead to transfer
switch “NEUTRAL” terminal.
4. Connect generator power supply leads from the
generator’s control panel to transfer switch terminals
marked “GENERATOR CONNECTION”.
5. Connect generator Neutral from the control panel to the
transfer switch “NEUTRAL” terminal.
6. Connect generator “GND” from the control panel to the
transfer switch “GND” terminal.
7. Connect generator utility 240V terminals to transfer
switch utility 240V terminals.
8. Tighten all wire connections/fasteners to proper torque.
7
WARNING
Low voltage wire cannot be installed in same
conduit as power voltage wiring.
• Failure to follow above warning could cause personal injury,
damage and/or malfunction of equipment.
Automatic
Transfer Switch
Main
Distribution
Panel

8BRIGGSandSTRATTON.COM
Generator
Neutral is
White wire
Utility 240V AC
GND lug
Wire
Nut
Two Pole
Breaker
Utility
Connection
Generator
Connection
Rear of
Control
Panel
Neutral
Bus
Neutral
Bus Ground
Bus
Main
Distribution
Panel
Automatic Power Transfer Switch
Home Standby
System Generator

9
Controls
Other than a Manual Override lever, there are no operator
controls because this is an automatic transfer switch. The
manual override is to be used only by licensed professionals.
Operation
To select automatic transfer operation, do the following:
1. Set utility service disconnect circuit breaker in transfer
switch to “On” position.
2. Set generator’s main circuit breaker to its “On” position.
3. Install 15 Amp fuse in control panel on generator.
4A. If generator is equipped with a system AUTO/OFF
switch, set switch to “AUTO” position.
B. If generator is equipped with a AUTO/OFF/MANUAL
switch, set switch to “AUTO” position.
The system will now be in automatic operation mode.
Testing the Automatic Transfer Switch
Turn the utility disconnect circuit breaker in the transfer
switch, to the “Off” position. The automatic sequence will
follow. To go back to utility power, turn the utility disconnect
circuit breaker to the “On” position.
Utility Fail
The Home Standby Generator set senses when utility voltage
is below 70 percent of nominal. Engine start sequence is
initiated after 6 second time delay.
Engine Warm-Up
Time delay to allow for engine warm-up before transfer is
fixed at 20 seconds or 50 seconds with removal of jumper
on control board.
Transfer
Transfer from utility to generator supply occurs after voltage
is above set levels. Minimum engine run time is 5 minutes
after transfer.
Utility Pickup
Voltage pickup level is 80 percent of nominal voltage.
Retransfer
Retransfer from generator to utility supply is approximately
10 seconds after utility voltage supply is above pickup level
and minimum run time is completed.
Engine Cool Down
Engine will run for 60 seconds after retransfer.
Maintenance
The transfer switch is designed to be maintenance free under
normal usage. However, inspection and maintenance checks
should be made on a regular basis. Maintenance will consist
mainly of keeping the transfer switch clean.
Visual inspections should be done at least once a month.
Access to transfer switch must not be obstructed. Keep
3 feet (92 cm) clearance around transfer switch. Check for
an accumulation of dirt, moisture and/or corrosion on and
around the enclosure, loose parts/hardware, cracks and/or
discoloration to insulation, and damaged or discolored
components.
Exercise the transfer switch at least once every three months
as described in the previous section Testing the Automatic
Transfer Switch unless a power outage occurs and Home
Generator System has gone through automatic sequence.
Allow generator to run for at least 30 minutes.
Contact a licensed electrical professional to inspect and clean
the inside of your transfer switch at least once a year.
Specifications
UL® 1008 Listed Transfer Switch
Model 01917
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .NEMA 1
Maximum Load Current: . . . . . . . . . . . . . . . . . . . . .50 Amps
Rated AC Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .250 Volts
Poles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50/60 Hz
Fault Current Rating . . . . .5,000 RMS Symmetrical Amperes
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27 lbs.
Model 01918
Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .NEMA 3R
Maximum Load Current: . . . . . . . . . . . . . . . . . . . . .50 Amps
Rated AC Voltage . . . . . . . . . . . . . . . . . . . . . . . . . .250 Volts
Poles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50/60 Hz
Fault Current Rating . . . . .5,000 RMS Symmetrical Amperes
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34 lbs.

10 BRIGGSandSTRATTON.COM
Troubleshooting
Problem Cause Correction
Automatic transfer switch does not
transfer to generator
1. Generator breaker open.
2. Generator voltage not acceptable.
1. Reset generator circuit breaker.
2. Refer to generator manual.
Automatic transfer switch does not
transfer to utility
1. Utility disconnect circuit breaker
open.
2. Utility voltage not acceptable.
1. Reset utility disconnect circuit
breaker.
2. Wait for utility voltage to return to
normal.
Generator is still running after switch
transfers to utility power
Engine cool down period. Engine should stop after 1 minute.
Generator is still running after utility
power is restored
1. Minimum engine run time has not
elapsed.
2. Fuse(s) in transfer switch is
defective.
1. Wait five minutes for transfer
switch to retransfer to utility power.
2. Check fuse(s) and replace if
necessary.