GE AV-Line - Cable Bracing and Installation; Cable Bracing Requirements; Main Cable Installation (AV-1;2;5)

WARNING
:
Short
Circuit
Cable
Bracing
Required
s
:
\
LOAD
CABLE
BRACING
MAIN
CABLE
BRACING
Load
cable
short
circuit
bracing
is
required
for
each
component
installed
in
an
AV
-
3
or
AV
-
4
switchboard
section
with
available
short
circuit
currents
of
65
,
000
rms
symmetrical
amperes
and
above
.
Main
cable
bracing
is
required
when
five
cables
per
phase
or
less
feed
a
switchboard
at
available
short
circuit
currents
of
100
,
000
and
150
,
000
rms
symmetrical
amperes
,
and
eight
cables
per
phase
or
less
at
an
available
short
circuit
current
of
200
,
000
rms
symmetrical
amperes
.
Assembly
,
purchasing
and
maintenance
instructions
for
main
cable
short
circuit
bracing
can
be
found
on
pages
6
and
7
.
Assembly
,
purchasing
and
maintenance
instructions
for
load
cable
short
circuit
bracing
can
be
found
on
page
8
.
Installing
The
Main
Cable
AV
-
1
,
AV
-
2
AND
AV
-
5
SWITCHBOARDS
UTILIZING
CORD
FOR
SHORT
CIRCUIT
PROTECTION
PRIOR
TO
INSTALLATION
minimum
,
making
6
revolutions
around
the
"
A
”
and
“
B
,
?
phase
main
cables
and
6
revolutions
around
the
“
B
"
and
“
C
”
phase
main
cables
.
Now
,
with
the
remaining
cord
,
wrap
the
main
cable
lashing
to
the
cable
braces
in
between
phases
with
4
to
5
revolu
-
tions
,
tieing
a
knot
to
the
cable
braces
as
you
complete
your
last
revolution
.
All
revolutions
should
be
made
as
tight
as
possible
so
as
to
prevent
whipping
during
short
circuits
.
Before
any
installation
work
is
performed
,
study
all
drawings
furnished
by
the
General
Electric
Company
for
the
particular
installation
.
These
include
arrangement
drawings
(
front
,
end
and
plan
view
)
,
connection
diagrams
and
schedule
of
equip
-
ment
.
Any
material
external
to
the
equipment
which
may
be
required
to
meet
any
local
codes
(
railings
,
etc
.
)
is
not
furnished
.
INSPECTION
AFTER
MAIN
CABLE
INSTALLATION
CABLE
BRACE
4
To
prevent
heating
,
there
should
be
no
closed
loop
of
steel
around
a
single
conductor
or
group
of
conductors
which
does
not
include
all
the
conductors
(
including
the
neutral
)
of
the
circuit
.
If
the
conductors
must
pass
through
separate
holes
in
a
piece
of
steel
,
slots
should
be
cut
between
the
holes
.
Do
not
allow
cables
carrying
heavy
current
to
come
near
instruments
or
meters
as
this
may
affect
their
accuracy
.
Use
the
minimum
amount
of
cable
necessary
to
accomplish
the
connections
.
The
increased
resist
-
ance
of
longer
cables
generates
unnecessary
heat
.
Main
cable
lashing
should
be
checked
bi
-
monthly
.
-
3
)
f
•
s
f o l
[
s
-
i
-
MAIN
CABLE
TERMINALS
FIGURE
7
B
INSTALLATION
PROCEDURES
FOR
MAIN
CABLE
WITH
SHORT
CIRCUIT
PROTECTION
Align
conduit
holes
in
a
linear
orientation
directly
over
or
as
close
as
possible
to
the
braces
.
Consideration
should
be
given
to
installing
conduits
or
sleeves
which
might
be
required
for
future
connections
.
Run
and
bend
the
main
cable
in
a
most
convenient
orientation
,
making
sure
the
main
cable
has
been
located
directly
up
against
the
cable
braces
before
it
connects
to
the
main
cable
terminals
.
Lash
the
main
cable
according
to
Figure
7
B
above
,
using
a
polyester
braided
rope
having
a
tensile
strength
of
2000
lbs
.
)
6
Courtesy of NationalSwitchgear.com