Alpha Technologies AlphaGen PN-6x-T 7.5kW 48Vdc - Manual (Page 23)

042-288-B0-001, Rev. A2 23
2.0 Site Preparation, continued
2.3 Enclosure Impact Protection
The National Fire Protection Agency (NFPA) requires that equipment using natural gas
or liquid propane be protected, based on good engineering practices, in areas where
vehicle traffic is normally expected at that location. The required protection is based on the
anticipated speed of the vehicles operated in that area. The NFPA does not provide specific
guidelines for when protection is needed or the nature of the protection. However, the intent is
to provide sufficient protection for the equipment should contact occur by a vehicle operating
in the area at a reasonably expected speed.
Alpha Technologies, Inc. cannot anticipate all the ways a vehicle may potentially threaten an
installed generator system, or the specific type of protection that is appropriate for a particular
location. The determination of the threat to the equipment and the means of protection are
the responsibility of the end user of the equipment and the authority having local jurisdiction.
The following installation drawings are general recommendations and are not intended to
be specific guidelines for protecting the equipment. The numbers of bollard posts (or other
protection devices) depend upon equipment locations, site surveys, and traffic patterns as
shown below in a typical installation.
Generator Protection, Vehicular Areas
Several variations of installation are possible. The diagrams provide information on the
different configurations and site installations. The collocated natural gas meter shown below
may require two to four bollard posts depending on location, site surveys, and traffic patterns.
Typical bollard post construction may change based on local codes regarding pipe material,
concrete, or stanchion design.
Fig. 2-3, Vehicular Area Impact Protection for Collocated Natural Gas Meter
Generator