v
There is a separate ground wire for each unit.
v
The green (or green and yellow) ground wires are connected only to the
ground bar.
v
The ground bar inside each power panel is connected to the frame of the
panel.
v
The neutral wires are connected only to the neutral bar.
v
The ground bar and the neutral bar are not connected together, except as
stated in step 3 of this procedure.
5.
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.
6.
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.
7.
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 iSeries 400 system. 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).
8.
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
This procedure contains actions 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)
An installation planning representative must perform all of the steps in this procedure.
Notes:
1.
Power off the iSeries 400 system and the power network branch circuits before
performing this procedure.
2.
The customer may have to get an electrician to perform some of the steps in
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.
1.
Check
ALL
system receptacles to ensure that each is wired correctly. This
includes receptacles for the iSeries 400 system and all equipment that attaches
to the iSeries 400 system-including workstations. Do this to determine if a
wire with primary voltage on it has been swapped with the ground wire,
Intermittent PIPs
336
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