Dell RapidPower 12-A NEMA power strip User manual

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Dell™ RapidPower Power
Distribution Units
Installation Guide
Guide d'installation
Installationsanleitung
取り付けガイド
Guía de instalación

www.dell.com | support.dell.com
Dell™ RapidPower Power
Distribution Units
Installation Guide

Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make better use of your computer.
NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to avoid
the problem.
CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.
_________________
Information in this document is subject to change without notice.
© 2007 Dell Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Trademarks used in this text: Dell and the DELL logo are trademarks of Dell Computer Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names
or their products. Dell Computer Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
May 2007 P/N T1595 Rev. A02

Contents 3
Contents
Caution: Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
General Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Precautions for Rack-Mountable Products . . . . . . . . . . . . . . . . . 6
PDU Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
PDU Kit Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Recommended Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation Tasks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Determining the AC Current Load . . . . . . . . . . . . . . . . . . . . . . 9
Installing PDUs in a Rack . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Attaching the Ground Wire . . . . . . . . . . . . . . . . . . . . . . . . . 15
Cabling the PDUs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
PDU Configurations and Technical Specifications . . . . . . . . . . . . . . . 22
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

4Contents

Installation Guide 5
This document describes how to install Dell™ RapidPower power distribution units (PDUs) in 42-unit (U)
and 24-U rack cabinets. The PDUs come in two basic types: standard PDUs, which have locking inlet power
cord connectors, and power strips, which do not require a locking connector.
The power strips and PDUs are installed either in the 0-U mounting area (the unoccupied area of the rack
between the side panels and component mounting space) using the mounting brackets that come attached
to the units or in a 1-U configuration using the mounting brackets provided with your kit.
Caution: Safety Instructions
Use the following safety guidelines to help ensure your own personal safety and to help protect your system
and system components from potential damage.
Throughout this safety section, the caution icon ( ) is used to indicate cautions and precautions that you
need to review and follow. For complete safety and regulatory information, see the
Product Information
Guide
that shipped with your system. Warranty information might be included in this document or as a
separate document.
CAUTION: Your PDU is safety-certified as a component for use in a rack cabinet. It is your responsibility to
ensure the final combination of PDU and rack cabinet complies with all applicable safety standards and local
electrical code requirements. The manufacturer disclaims all warranties and liability in connection with such
combinations.
CAUTION: All load devices (computer equipment) produce leakage current. It is recommended that you use
locking plugs for supply connections. If locking plugs are not used, do not exceed 3.5 mA per supply connection.
Have a qualified electrician ensure proper grounding.
General Precautions
Systems are considered to be components in a rack. Thus, "component" refers to any system as well as
to various peripherals or supporting hardware.
Observe the following general precautions for installing your PDU:
• Observe and follow service markings. Do not service any product except as explained in your system
documentation. Opening or removing covers that are marked with the triangular symbol with a
lightning bolt may expose you to electrical shock. Components inside these compartments should
be serviced only by a trained service technician.
• Ensure that the electrical source power circuit complies with all local and national electrical codes
and regulations.
• If any of the following conditions occur, unplug the product from the electrical outlet and replace
the part or contact your trained service provider:
– The power cord, extension cable, or plug is damaged.
– An object has fallen into the product.
– The product has been exposed to water.
– The product has been dropped or damaged.
– The product does not operate correctly when you follow the operating instructions.

6Installation Guide
• Use the correct external power source. Operate the product only from the type of power source
indicated on the electrical ratings label. If you are not sure of the type of power source required,
consult your service provider or local power company.
• Use only power cords provided with your PDU or system.
• Power cords used to connect a component to your PDU must be rated for the voltage and current
marked on the component's electrical rating label. The voltage and current rating of the power cord
should be greater than the rating marked on the component.
• To help prevent electric shock, plug the PDU inlet power cords into properly grounded electrical
outlets. These power cords are equipped with three-prong plugs to help ensure proper grounding.
Do not use adapter plugs or remove the grounding prong from a power cords. Do not use an extension
cable.
• Ensure that each extension cable and power strip total ampere rating for all products plugged into
the extension cable or power strip comply with all local and national electrical codes and regulations.
• Position system cables and power cords carefully; route system cables and the power cord and plug so
that they cannot be stepped on or tripped over. Be sure that nothing rests on your system components’
cables or power cord.
• Do not modify PDUs or power cords. Consult a licensed electrician or your power company for site
modifications. Always follow the local and national electrical codes and regulations for your country
or region.
• PDUs that attach directly to a main AC source by terminal block connections must be installed by
a licensed electrician. Always follow the local and national electrical codes and regulations for your
country or region.
Precautions for Rack-Mountable Products
Observe the following precautions for rack stability and safety. See the rack installation documentation
accompanying the rack for specific warning and/or caution statements and procedures.
• Before working on a rack, ensure that your rack has been installed safely according
to the instructions in your rack installation documentation.
• Do not step on or stand on any system or component when servicing other systems or components
in a rack.

Installation Guide 7
PDU Models
The power strips and PDUs provide power solutions that utilize regionalized inlet and outlet plug options.
There are ten basic configurations, shown in Figure 1-1: a 12-A NEMA power strip, a 10-A IEC power strip,
a 12-A IEC power strip, a 16-A PDU, a 16-A hybrid PDU, a 24/32-A PDU, a 32-A PDU, a 40-A PDU,
a 30-A Three-Phase PDU, and a 60-A Single-Phase PDU. For specific configuration information for
each model and option, see "PDU Configurations and Technical Specifications."
Figure 1-1. PDU Models
NOTE: Dell recommends that you label your PDU models and power strips with the corresponding voltages.
Locate the packet of voltage labels included in your rack kit contents and select the corresponding label to affix
to the appropriate model. See Figure 1-2 for kit contents and Figure 1-8 for recommended label orientation.
12-A NEMA
power strip
10-A and
12-A IEC
power strips
16-A hybrid
PDU
24/32-A PDU 32-A and
40-A PDU
16-A PDU 30-A Three-Phase and
60-A Single-Phase PDUs

8Installation Guide
PDU Kit Components
The kit components (shown in Figure 1-2) are the same for all PDU models.
• One PDU (with the 0-U mounting bracket attached)
• Power cords (of various lengths and types depending on the model)
• Two 1-U mounting brackets
• Three 10-32 x 0.5-inch pan-head screws
• Two #10 flat washers
• One #5.5 x 13-mm
black thread-forming screw
• Two #10 star locking washers
• Three horizontal rail spacing pads
• Two cage nuts
• One ground wire
• One power cord retainer bracket (for 10-A and 12-A power strips and 16-A PDUs only)
• One package of voltage labels for customers for identifying voltages on PDUs and power strips
(if applicable)
Figure 1-2. Kit Contents
horizontal rail
spacing pads (3)
1-U mounting brackets (2)
10-32 x 0.5-inch pan-
head screws (3)
#10 star locking
washers (2)
#5.5 x 13-mm black
thread-forming screw (1)
#10 flat
washers (2)
PDU with 0-U
mounting bracket
attached (12-A IEC
power strip shown) power cord(s)
cage nuts (2)
power cord retainer
bracket (for 10-A and
12-A power strips and
16-A PDUs only)
ground wire
voltage labels
(if applicable)

Installation Guide 9
Recommended Tools
• #2 Phillips-head screwdriver
• Cage nut installation tool (for 1-U installation only)
Installation Tasks
1 Determining the AC current load
2 Installing PDUs in a rack
3 Attaching the ground wire
4 Cabling the PDUs
Determining the AC Current Load
Before you install a PDU in your rack, you must ensure that the total power requirements of all the systems
you plan to connect to this PDU are within the PDU’s maximum current specification. You may require
multiple PDUs to properly protect your installed rack systems and equipment.
The maximum current requirements are found in the
User’s Guide for most rack-mountable products.
To find the total current value, add the maximum current values for all components that you intend to plug
into the PDU. The total current value must not exceed the maximum current rating marked on the side of
the PDU. For example, if your PDU has a maximum current rating of 16 A, the total combined current for
all component power cord connectors plugged into the PDU must not exceed 16 A.
NOTICE: The maximum AC current load that a single PDU can support is specified on its label. Any load greater
than that specified will cause the circuit breaker in the PDU to trip, disconnecting the power. Multiple PDUs must
be installed if the electrical load exceeds the maximum current rating for a single PDU.
Installing PDUs in a Rack
You can install the PDU in either a horizontal or vertical orientation in a rack. When mounted horizontally
at the back of the rack, the PDU occupies 1 U of rack component mounting space. When mounted
vertically or horizontally on the side of the rack, the PDU does not occupy any rack component mounting
space. This installation method is referred to as 0-U mounting because the unit is secured on separate rails
on the side of the rack cabinet.
NOTE: Due to variations in rack design, the 0-U mounting position is not an option for all racks. The 1-U mounting
position is an option for all racks that meet the specifications of the American National Standards Institute
(ANSI)/Electrical Industries Association (IEC) standard ANSI/EIA-310-D-92, International Electrotechnical
Commission (IEC) 297, and Deutsche Industrie Norm (DIN) 41494.

10 Installation Guide
Installing PDUs in the 0-U Mounting Position
The outer vertical rails of Dell 42-U and 24-U racks contain cutouts that allow access to the PDU’s back
outlet connectors. When installing a PDU in a rack with these cutouts, position the PDU so that the back
outlet connector is accessible through the cutout (see Figure 1-3).
NOTE: Not all 0-U vertical-rail mounting positions have a cutout to access the back outlet connectors.
Additionally, only one of the 16-A PDU’s back outlet connectors will be accessible through the rail cutout
(see Figure 1-3).
The recommended 0-U mounting position for the 10-A and 12-A power strips, the 16-A PDU, the 30-A
Three-Phase PDU, and the 60-A Single-Phase PDU is on the outer vertical rail at the back of the rack. Up
to six 10-A or 12-A power strips and up to four 16-A PDUs, 30-A Three-Phase PDUs, or 60-A Single-Phase
PDUs can be mounted on each outer vertical rail of a 42-U rack. One 16-A PDU, 30-A Three-Phase PDU,
or 60-A Single-Phase PDU can also be mounted on each of the outer horizontal rails of a 42-U rack. Up to
three 10-A or 12-A power strips and up to two 16-A PDUs, 30-A Three-Phase PDUs, or 60-A Single-Phase
PDUs can be mounted on each outer vertical rail of a 24-U rack. See Figure 1-3 for the 0-U mounting
position options on a 42-U rack.
The recommended 0-U mounting position for 24/32-A, 32-A, and 40-A PDUs is on the outer horizontal rails
of a 42-U rack and on the back vertical rails of a 24-U rack. See Figure 1-3 for the 0-U mounting position
options on a 42-U rack.
To install a PDU in the 0-U space on the side of your rack, perform the following steps:
1 Remove the side panel(s) from the rack.
See the user documentation provided with the rack for instructions on removing the side panels.
2 Identify the location for the PDU in either the vertical or horizontal rail position that is closest
to the systems to which it will supply power.
Ensure that all power cords that you intend to connect to the PDU can reach the PDU position you
have selected.
NOTE: If you are installing a PDU on the horizontal rail, you must affix the self-adhesive spacing pads to the
back of the PDU in order to ensure a secure fit. Place one spacing pad next to each pair of mounting hooks
(see Figure 1-3).

Installation Guide 11
Figure 1-3. PDU Systems 0-U Mounting Positions
horizontal rails (2)
back vertical rails (2)
horizontal rail spacing pads
front
outlet connector rail cutout

12 Installation Guide
3 Position the PDU so that the mounting hooks enter the square holes on the vertical or horizontal rail.
4 Push down on the PDU until the mounting hooks seat in the square holes and the release button pops
out and clicks (see Figure 1-4).
Figure 1-4. PDU Installation (0-U Vertical Position)
Installing PDUs in the 1-U Mounting Position
The recommended 1-U mounting position for a PDU is at the back of the rack as close as possible to the
installed equipment that it will power. The installation brackets can be attached to the sides of the PDU for
either a back-facing or front-facing orientation. Whichever orientation you use, be sure the PDU placement
allows enough cable slack so that each rack-installed system connected to it can slide freely for servicing.
release button
outlet connector rail cutout

Installation Guide 13
To install a PDU horizontally in the 1-U space at the back of your rack, perform the following steps:
1 Open the front and back doors of the rack cabinet.
2 Identify and mark the location for the PDU in the lowest single-unit (1 U) position in which it
can be installed or in the position that is closest to the systems to which it will supply power.
Ensure that all power cords that you intend to connect to the PDU can reach the PDU location
you have selected.
3 Remove the 0-U mounting bracket from the PDU case by removing the six 6-32 x 0.31-inch flat-head
screws at the ends of the PDU case.
Save these screws to use in attaching the 1-U mounting brackets in step 4 (see Figure 1-5).
Figure 1-5. Removing the 0-U Mounting Bracket
4 Secure the two 1-U mounting brackets to the PDU case with the screws you removed in step 3
making a tight connection (torque value is approximately 6-8 in-lbs), as shown in Figure 1-6.
5 Install the cage nuts in the second holes of the selected 1-U position on the rails.
6 Position the PDU and secure the unit to the rails with screws and washers, making a tight connection
(torque value is approximately 12-16 in-lbs), as shown in Figure 1-6.
0-U mounting bracket
PDU case
6-32 x 0.31-inch
flat-head
screws (6)

14 Installation Guide
Figure 1-6. PDU Installation (1-U Horizontal Position)
#10 cage nuts (2)
#10 flat
washers (2)
10-32 x 0.5-inch
pan-head
screws (2)
ground wire connection front

Installation Guide 15
Attaching the Ground Wire
1 Connect the ground wire to the PDU by inserting the 10-32 x 0.5-inch screw through the eyelet
on the ground wire and then through the star washer, and then attach the screw to the ground wire
connection on the front of the PDU (see Figure 1-6).
NOTE: Use only the PDU’s threaded grounding hole marked with the ground symbol. This hole is at the end
of the PDU next to the inlet connector (see Figure 1-6).
Secure the screw so that the star washer makes tight contact with the bare metal of the PDU case.
NOTE: A tight connection is required to ensure that the star washer contacts bare metal through the paint
on the PDU case (torque value is approximately 12-16 in-lbs).
2 Connect the free end of the PDU ground wire to the rack frame by inserting the thread-forming screw
through the eyelet on the ground wire and then through the star washer (see Figure 1-7).
CAUTION: Do not attempt to use any one of the inner four posts of the rack as an attach point for connecting the
ground wire to the rack. When you ground the cable to the rack, ensure that you select an attach point that is one
of the holes located only on the outer members of the rack frame, as shown in Figure 1-7.
Secure the black thread-forming screw to one of the round rack holes on the rack frame so that the star
washer makes tight contact (torque value is approximately 24-30 in-lbs) with the bare metal of the rack
(see Figure 1-7).
NOTE: A tight connection (torque value of approximately 24-30 in-lbs) is required to ensure that the star
washer contacts bare metal through the paint on the vertical rail of the rack.
Figure 1-7. PDU Ground Wire Connection
ground wire connection on outer frame
correct PDU grounding on outer frame
outer rack
frame

16 Installation Guide
Cabling the PDUs
The methods that you use to cable your rack components to a power strip or PDU depend on many factors.
For 10-A and 12-A power strips and 16-A, 24/32-A PDUs, 30-A Three-Phase PDUs, and 60-A Single-Phase
PDUs various inlet and outlet power cords are provided with each unit based on national and regional
specifications. Each power strip or PDU is shipped with one or two region-specific inlet cables and, in some
cases, a number of standard IEC 60320 outlet cables in various lengths and a NEMA-to-IEC adapter cable.
The inlet power cords for 10-A and 12-A power strips and 16-A PDUs are detachable. The detachable power
cords come with a support bracket that attaches to the PDU case to help secure the inlet power connector
to the PDU. The inlet power cord for the 24/32-A PDU, the 30-A Three-Phase PDU, and the 60-A Single-
Phase PDU is fixed.
The 32-A and 40-A PDUs use terminal block connections that must be hardwired to a main AC source by a
licensed electrician. For 32-A and 40-A PDUs, various outlet power cords are provided with each unit based
on national and regional specifications. An inlet cable and conduit are not supplied with the 32-A and 40-A
PDUs.
CAUTION: PDUs that attach directly to a main AC source by terminal block connections must be installed
by a licensed electrician. Always follow the local and national electrical codes and regulations for your country
or region.
incorrect PDU grounding on inner rails
vertical mounting rails (4) inner rails (4)

Installation Guide 17
Attaching the Inlet Power Cord and Support Bracket for 10-A and 12-A Power Strips and 16-A PDUs
1 Attach the inlet power cord to the PDU.
2 Insert the ends of the bracket into the two holes on either side of the inlet connector, and rotate
the bracket until it makes firm contact with the power cord (see Figure 1-8).
NOTE: For optimum cord retention, apply equal pressure to both sides of the power-cord support bracket until it
closes firmly around the power cord.
Figure 1-8. Attaching the Power Cord Support Bracket
NOTE: Dell recommends that you label your PDU models and power strips with the corresponding voltages.
Locate the packet of voltage labels (if included in your rack kit contents) and select the corresponding label to affix
to the appropriate model. See Figure 1-2 for kit contents and Figure 1-8 for recommended label orientation.

18 Installation Guide
Cabling 10-A and 12-A Power Strips
10-A and 12-A power strips can be used as power extensions from a UPS (see Figure 1-9).
Figure 1-9. Cabling a 10-A and 12-A Power Strips From a UPS
10-A and 12-A power strips can also be used as power extensions from 16-A, 24/32-A, 32-A, and 40-A PDUs
(see Figure 1-10). Table 1-1 lists the maximum number of power strips that can be used with each PDU.
Table 1-1. Maximum Number of Power Strips per PDU
PDU Model Maximum Combined
Current per PDU
Maximum Number
of 10-A Power Strips
Maximum Number
of 12-A Power Strips
16-A PDU 16 A 1 1
24/32-A PDU 24/32 A 2 2
32-A PDU 32 A 4 NA
40-A PDU 40 A NA 4
30-A Three-Phase PDU 30 A 3 2
60-A Single-Phase PDU 60 A 3 3
rack component
UPS
10-A or 12-A
power strip