Whenever possible, locate the generator
set in an area free of dust and moisture. Avoid soft or
muddy ground. If it is necessary to locate the unit on soft
or muddy ground, arrange a foundation of planks or logs
to prevent the unit from settling or sinking. The
generator set should be operated from a position as level
as possible at all times.
Requirements for providing adequate space
for operation, maintenance and ventilation (cooling) are
contained in paragraphs 1., 2., and 3. below. For the
type of construction and fortification necessary for
protection of personnel and equipment, refer to Field
Manual 5-13, The Engineer Soldiers Handbook, 5-15
Field Fortification and 5-34 Engineer Field Data.
A minimum clearance of four feet (120 cm)
from all sides of the unit to the wall should be maintained
whether the inclosure is roofed or unroofed, dug in or
The height of the sandbagged or dug in
inclosure should be a minimum of four feet (120 cm)
above the top of the generator.
For roofed inclosure, sandbagged or dug in,
a minimum clearance of four feet (120 cm) should be
maintained between the top of the generator and the
Do not operate the generator set until
the ground stud terminal has been
Electrical faults in the generator set, load
lines, or load equipment can cause
death by electrocution from contact with
an ungrounded system.
Sandbagging may be used to support
Grounding. The generator set must be
grounded prior to operation. The ground can be, in
order of perference, an underground metallic water
piping system, a driven rod, or a buried metal plate. A
ground rod must have a mimimum diameter of 5/ 8 inch
(1.59 cm) if solid or 3/4 inch (1.91 cm) if pipe, and must
be driven to a mimimum depth of 8 feet (240 cm). A
ground plate must have a mimimum area of 9 square
feet (0.81 M ) and be buried at a mimimum depth of 4
feet (120 cm). The ground lead must be a number
6AWG (American Wire Gage) copper wire and be bolted
or clamped to the rod, plate, or piping system. Connect
the other end of the ground lead to the ground stud
Leveling. Set up the unit as level as
possible. Keep the unit as level as possible during
Do not install or change the load cables
while the generator set is operating.
The voltage generated by this equipment
can cause death. When installing load
terminals, care should be taken to avoid
shorts between terminals. Arrange
leads to avoid a short occurring if the
cable is bumped or pulled. Tie the leads
in position with the insulation material if
Loosen the nuts on the studs on the load
terminals, figure 4-4.
Figure 4-4. Load connections.