Generac Power Systems 005040-0 Generator Mounting And Support, Basic Standby Electric System

Section 2 — Installation

Guardian Liquid-cooled 25 kW Generator

•NFPA No. 68, GUIDE FOR EXPLOSION VENTING

•NFPA No. 70, NATIONAL ELECTRICAL CODE.

•NFPA No. 30, FLAMMABLE AND COMBUSTIBLE LIQUIDS CODE.

•NFPA No. 10, INSTALLATION, MAINTENANCE AND USE OF PORTABLE FIRE EXTINGUISHERS.

‹2.1.2 OTHER PUBLISHED STANDARDS

In addition to NFPA standards, the following infor- mation 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 MAINTE-

NANCE 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 SYS- TEMS, available from the American National Standard Institute, 1430 Broadway, New York, N.Y. 10018.

2.3GENERATOR MOUNTING AND

SUPPORT

Retain the generator compartment to a concrete slab with 1/4-inch masonry type anchor bolts. Be sure the bolts are long enough to retain the compartment. The slab should be at least six inches thick and should extend beyond the enclosure to a distance of at least three inches on all sides.

2.4BASIC STANDBY ELECTRIC

SYSTEM

Figure 2.1 shows a schematic diagram of a basic standby electric system. Both the UTILITY power supply and the STANDBY GENERATOR output are connected to an approved transfer switch. The trans- fer 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.

Notice that both the STANDBY and the UTILITY power supplies to the transfer switch are protected against overload by a main line circuit breaker.

2.2GENERATOR LOCATION

Install the generator set, in its protective enclosure outdoors, where adequate cooling and ventilating air always is available. Consider these factors:

•Install the unit where air inlet and outlet openings will not become obstructed by leaves, grass, snow, etc. If prevailing winds will cause blowing or drift- ing, consider using a windbreak to protect the unit.

•Install the generator on high ground where water levels will not rise and endanger it.

•Allow sufficient room on all sides of the generator for maintenance and servicing. A required mini- mum allowance of space to any solid structure is three feet. Five feet allowance of space is recom- mended.

•Where strong prevailing winds blow from one direction, face the generator air inlet openings into the prevailing winds.

•Install the generator as close as possible to the transfer switch. This reduces the length of wiring and conduit.

•Install the generator as close as possible to the fuel supply, to reduce the length of piping. HOWEVER, REMEMBER THAT LAWS OR CODES MAY REG- ULATE THE DISTANCE.

Figure 2.1 – Basic Standby Electric System

NOTE:

Generac recommends the use of a Generac Power Systems transfer switch in conjunction with this generator.

Generac® Power Systems, Inc. 9