Figure 4-3.
TM 5-6115-625-14&P
N O TE
As a substitute for the supplied ground wire, any copper wire of at least No. 6
AWG maybe used.
(1) Underground water system. Ground power unit to one of the accessible pipes in an under-
ground water system. Make certain underground pipe is made of metal and there is no
insulation, such as a water meter, between ground wire and the earth.
(2) Ground rod. Drive ground rod a minimum of eight feet into earth. A ground rod must have a
minimum diameter of 5/8-inch, if solid, or 3/4-inch if pipe.
N O T E
It maybe necessary to saturate the area around ground rod with water if soil
conditions are dry.
(3) Ground plate. Ground power unit to a metal plate buried four feet deep. Ground plate
should cover a minimum area of nine square feet.
c. External Fuel Line Connection. (See figure 4-4). The power unit generator set can be fueled
from an external source such as a five-gallon fuel can or 55 gallon drum. This eliminates the need for
frequent refilling of the generator’s fuel tank during long intervals of operation.
4-5
