4-2.
INSTALLATION. (cont)
a.
General. (cont)
NOTE
If the generator set cannot be
grounded
using
the
following
methods, refer to FM20-31.
b. Flightline Hardstand Ground Stud.
(1) Position generator set within
easy access of hardstand ground stud
and set handbrake.
(2) Using at least No. 6 AWG
(American Wire Gauge) copper wire, cut
length of wire to fit between grounding
stud on generator set and hardstand
ground stud.
(3) Strip 1-1/2 inches (38 mm)
insulation,
if any,
from one end of
wire.
Attach to grounding stud.
(4) Strip insulation from other
end of wire.
Crimp wire on mounting
lug. Attach mounting lug to hardstand
ground stud.
Tighten connections to
ensure a good electrical bond.
c.
underground Metallic Water Pipe.
(1) Uncover metallic water pipe
for at least 10 feet (3.05 m) to ensure
that sufficient length is available
between
any
insulated
sections.
joints or
NOTE
If the distance between
joints or sections is
10 feet (3.05 m), this
method is unacceptable.
insulated
less than
grounding
4-3)
inch
from
ARMY
TM 5-6115-612-12
MARINE CORPS TM 6115-12/7
AIR FORCE
TO 35C2-3-471-1
NAVY
AG-320B0-0MM-000
(2) Attach ground rod
(figure
to ground cable by stripping 1
(25 mm) of insulation, if any,
ground cable. Insert stripped end
of cable in clamp enough to insure a
good electrical bond.
(3) Place ground rod with at-
tached ground cable along water pipe.
Attach ground rod securely to water
pipe to ensure a good electrical bond.
(4) Cover water pipe with dirt.
(5) Position generator set within
easy access of grounding facility and
set handbrake.
(6)
(American
length of
stud on
facility.
(7)
Using at least No. 6 AWG
Wire Gauge) copper
wire to fit between
generator set and
Strip 1-1/2 inches
wire, cut
grounding
grounding
(38 mm)
insulation.
if anv,
from one end of
wire.
Attach to grounding stud.
(8) Strip insulation from other
end of wire.
Crimp wire on mounting
lug. Attach mounting lug to hardstand
ground stud.
Tighten
ensure a good electrical
d. Driven Metal Rod.
NOTE
connection to
bond.
A driven metal ground rod must
have a minimum diameter of 5/8
inch (16 mm) if solid, or 3/4
inch (19 mm) if pipe.
Rod must
be driven to a minimum of 8 feet
(2.45 m).
4-7
