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STATIONARY EMERGENCY
GENERATOR INSTALLATION
Connecting this generator to an electrical
system normally supplied by an electric util-
ity shall be by means of a transfer switch
(such as the "GTS" type transfer switch),
so as to isolate the electric system from the
utility distribution system when the genera-
tor is operating. Failure to isolate the electric
system by these means will result in damage
to the generator and may also result in injury
or death to utility workers due to backfeed of
electrical energy.
If an open bottom is used, the engine-gener-
ator is to be installed over non-combustible
materials and should be located such that
combustible materials are not capable of
accumulating under the generator set.
Only qualified, competent installation contractors or electricians
thoroughly familiar with applicable codes, standards and regula-
tions should install this standby electric power system. The instal-
lation must comply strictly with all codes, standards and regula-
tions pertaining to the installation.
This Stationary Emergency Generator must be installed on a level
surface. The base frame must be level within two (2) inches all
around.
After the system has been installed, do noth-
ing that might render the installation in non-
compliance with such codes, standards and
regulations.
For more information about the installation of a standby sys-
tem, order Engine-Generator Standby Electric Power Systems
Installer's Guide and Reference Manual (part #046622) from
an Authorized Service Dealer.
NFPA STANDARDS
The following published standards booklets pertaining to standby
electric systems are available form the National Fire Protection
Association (NFPA), Batterymarch Park, Quincy, MA 02269:
• NFPA No. 37, STATIONARY COMBUSTION ENGINES AND GAS
TURBINES.
• NFPA No. 76A, ESSENTIAL ELECTRICAL SYSTEMS FOR
HEALTH CARE FACILITIES.
• NFPA No. 220, STANDARD TYPES OF BUILDING CONSTRUCTION
• NFPA No. 68, GUIDE FOR EXPLOSION VENTING
• NFPA No. 70, NATIONAL ELECTRICAL CODE.
• NFPA No. 30, FLAMMABLE AND COMBUSTIBLE LIQUIDS
CODE.
NOTE:
• NFPA No. 10, INSTALLATION, MAINTENANCE AND USE OF
PORTABLE FIRE EXTINGUISHERS.
OTHER PUBLISHED STANDARDS
In addition to NFPA standards, the following information pertaining
to the installation and use of standby electric systems is available:
• Article X, NATIONAL BUILDING CODE, available from the
American Insurance Association, 85 John Street, New York,
N.Y. 10038.
• AGRICULTURAL WIRING HANDBOOK, obtainable from the Food
and Energy Council, 909 University Avenue, Columbia, MO,
65201.
• ASAE EP-364.2, INSTALLATION AND MAINTENANCE OF FARM
STANDBY ELECTRIC POWER, available from the American
Society of Agricultural Engineers, 2950 Niles Road, St. Joseph,
MI 49085.
• A52.1, AMERICAN NATIONAL STANDARD FOR CHIMNEYS,
FIREPLACES AND VENTING SYSTEMS, available from the
American National Standard Institute, 1430 Broadway, New
York, N.Y. 10018.
BASIC STATIONARY EMERGENCY
GENERATOR ELECTRIC SYSTEM
Figure 2.1 shows a schematic diagram of a basic standby elec-
tric system. Both the UTILITY power supply and the Stationary
Emergency Generator output are connected to an approved trans-
fer switch. The transfer switch is required by electrical code and
serves the following functions:
• Permits the LOAD circuits to be connected to only one power
supply at a time.
• Prevents electrical backfeed between the generator and the
UTILITY power circuits.
Figure 2.1 – Basic Generator Electric System
Notice that both the GENERATOR and the UTILITY power supplies
to the transfer switch are protected against overload by a main line
circuit breaker.
Installation
9
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