9.
For
systems
with
more
than
one
unit,
the
ground
wire
for
each
must
not
be
connected
from
one
receptacle
to
the
next
in
a
string.
Each
unit
must
have
its
own
ground
wire,
which
goes
to
the
power
source.
10.
The
grounding
wires
must
be
insulated
with
green
(or
green
and
yellow)
wire
at
least
equal
in
size
to
the
phase
wires.
The
grounding
wires
also
should
be
as
short
as
possible.
11.
If
extension-mainline
power
cables
or
multiple-outlet
power
strips
are
used,
they
must
have
a
three-wire
cable.
One
of
the
wires
must
be
a
ground
conductor.
The
ground
connector
on
the
plug
must
not
be
removed.
This
applies
to
any
extension
mainline
power
cables
or
multiple-outlet
power
strips
that
are
used
on
the
server.
It
also
applies
for
attaching
devices
such
as
personal
computers,
workstations,
and
modems.
Note:
Check
all
extension-mainline
power
cables
and
multiple-outlet
power
strips
with
an
ECOS
tester
and
with
power
that
is
applied.
Ensure
that
no
wires
are
crossed
(for
example,
a
ground
wire
crossed
with
a
wire
that
has
voltage
on
it).
12.
For
a
diagram
of
grounding
in
a
typical
power
distribution
system,
see
Appendix
C
in
the
Physical
Planning
Reference
.
This
ends
the
procedure.
INT-PIP9
Utility
power
and
battery
power
units:
For
use
by
authorized
service
providers.
Use
this
procedure
to
check
the
ac
electrical
power
for
the
system.
DANGER
An
electrical
outlet
that
is
not
correctly
wired
could
place
hazardous
voltage
on
metal
parts
of
the
system
or
the
products
that
attach
to
the
system.
It
is
the
customer’s
responsibility
to
ensure
that
the
outlet
is
correctly
wired
and
grounded
to
prevent
an
electrical
shock.
(RSFTD201)
1.
Have
an
installation
planning
representative
or
an
electrician
(when
necessary),
perform
the
following
steps.
2.
Power
off
the
iSeries
system
and
the
power
network
branch
circuits
before
performing
this
procedure.
3.
Read
Electrical
Safety
for
IBM
Service
Representatives
,
S229-8124.
4.
To
ensure
the
safety
of
personnel,
all
electrical
wiring
in
the
United
States
must
meet
National
Electrical
Code
requirements.
5.
Check
ALL
system
receptacles
to
ensure
that
each
is
wired
correctly.
This
includes
receptacles
for
the
iSeries
system
and
all
equipment
that
attaches
to
the
iSeries
system-including
workstations.
Do
this
to
determine
if
a
wire
with
primary
voltage
on
it
has
been
swapped
with
the
ground
wire,
causing
an
electrical
shock
hazard.
Use
the
procedures
for
checking
receptacles
in
Electrical
Safety
for
IBM
Service
Representatives
,
S229-8124.
6.
When
three-phase
voltage
is
used
to
provide
power
to
the
iSeries
system,
correct
balancing
of
the
load
on
each
phase
is
important.
Each
unit
in
the
iSeries
system
uses
only
two
of
the
three
phases.
Therefore,
the
units
should
be
connected
so
that
all
three
phases
are
used
equally.
Use
the
following
as
a
guide
to
help
balance
the
phases:
v
Connect
a
unit
across
phases
A
and
B
v
Connect
a
unit
across
phases
B
and
C
v
Connect
a
unit
across
phases
A
and
C
v
Continue
in
this
sequence
for
additional
units
7.
The
power
distribution
neutral
must
return
to
the
″
separately
derived
source
″
through
an
insulated
wire
that
is
the
same
size
as
the
phase
wire
or
larger.
Note:
″
Separately
derived
source
″
is
defined
in
step
8
(See
page
8.
The
iSeries
system
and
its
attached
equipment
should
be
the
only
units
that
are
connected
to
the
power
distribution
network
that
the
system
gets
its
power.
112
iSeries:
iSeries
Server
270,
800,
810,
820,
825,
830,
840,
870,
890,
SB2,
and
SB3
Hardware
Problem
Analysis
and
Isolation
