Siemens GM-SG - Page 26

Electrical
Connections
7
.
Assemble all
joints
as
shown
in
Figures
17
thru
20
.
Install all hardware the
same
way
that
factory
bus
connections
were
installed
.
Hardware
must
be
aligned properly
or
molded insulation
may
not
fit
over
the
joints
.
7
a
.
Place
a
flat
washer
on
the
cap
screws
(
bolt
)
and
insert
the
cap
screw
through
the bus
joint
towards
rear
of
unit
.
7
b
.
Place
a
flat
washer
against
the bus bar
with
a
lock
washer between the
flat
washer and the
nut
.
7
c
.
Spacers
are
required
at
certain
bus
joints
to
insure
the
cross
sectional
area
of
the
joint
.
The
conditions
where these
spacers
are
required
vary
with
the
type
of
bus
joint
.
Refer
to
Figure
19
.
Torque
the
1
/
2
-
13
SAE
Grade
No
.
5
cap
screws
to
50
-
75
Ib
-
ft
.
(
68
-
102
Nm
)
torque
.
(
If
special
hardware is
required
by
an
order
,
other
torque
values
will
be
supplied
with
field
assembly drawings
.
)
Install insulation boots
or
tape
joints
where
required
per
instructions
in
following
sections
.
10
.
Connect
ground
bus
.
See
Figure
30
.
Insert
bar
in
side
wall
opening
to
overlap
the
ground
bus
in
adjacent
cubicles
.
11
.
Torque
the
3
/
8
-
16
SAE
Grade
5
cap
screw
used
in
the
ground
bus
to
25
-
40
Ib
-
ft
.
(
34
to
54
Nm
)
.
8
.
9
.
Porcelain
or
Cycloaliphatic
Epoxy
Bus
Support
(
Grommet
/
inserts
optional
)
For
illustration
only
shown with
3
bars
in
phase
A
and
2
in
phase
B
and
1
in
phase
C
for
connection
to
breaker
cell
in
lower
and
upper
compartment
.
Connection
to
top compartment
shown dashed
Illustration
depicts
arrangement
with
optional porcelain
or
cycloaliphatic
epoxy
bus
support
inserts
.
Glass
Polyester
Support
Insulation
Boot
nnn
m
r
~
-
c
*
—
F
;
;
jj
=
\
Typical Rating
(
4000
A
)
h
+
-
r
+ +
n
A A
yj
~
7
E
~
r
I
h
+
+
1
I
7
"
(
3000
A
)
B B
>
~
Z L
~
n
r
rk
—
I
"
t
=
I
P
P
3
(
1200
A
or
2000
A
)
+ +
T
i i i i
c
I I
ITEA
c
B A
Main
Bus
Bar
j
Bus
Riser
Grommet
/
Insert
Side
View
Rear
View
Figure
17
.
Main
Bus
Joints
-
Circuit
Breaker
Section
24
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