POWER CORD INSTALLATION GUIDE

Raritan PXThis installation guide explains how to install power cords on Raritan PX products that do not come with a factory installed powercord. This type of product, such as PX2-4550XU and in-line monitors, provides the flexibility of using a power cord with the style youneed.

Safety Guidelines
WARNING! These instructions are not for products withfactory-installed flexible cords. Do not open a Raritan productwith a factory-installed cord.
WARNING! Do not replace the cable gland. The chassis ispunched for the correctly-sized gland and is not for different
wiring methods such as conduit.
WARNING! These instructions must be performed by alicensed electrician.
WARNING! Raritan products must not be serviced whileenergized. Before servicing, (a) disconnect from power, (b)disconnect any devices plugged into the product's
receptacles, and (c) disconnect all interconnect cables.
WARNING! Read and understand all sections in this guide
before installing or operating this product.
WARNING! Connect this product to an AC power source
whose voltage is within the range specified on the product’snameplate. Operating this product outside the nameplate
voltage range may result in electric shock, fire, personal
injury and death.
WARNING! Connect this product to an AC power source thatis current limited by a suitably rated fuse or circuit breaker inaccordance with national and local electrical codes. Operating
this product without proper current limiting may result inelectric shock, fire, personal injury and death.
WARNING! Connect this product to a protective earth ground.
Never use a “ground lift adaptor” between the product’s plugand the wall receptacle. Failure to connect to a protective
earth ground may result in electric shock, fire, personal injury
and death.
WARNING! This product contains no user serviceable parts.
Do not open, alter or disassemble this product except as
described in this manual. Failure to comply with this warning
may result in electric shock, personal injury and death.
WARNING! Use this product in a dry location. Failure to use
this product in a dry location may result in electric shock,personal injury and death.

Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHSWARNING! Do not rely on this product’s receptacle lamps,receptacle relay switches or any other receptacle power
on/off indicator to determine whether power is being supplied
to a receptacle. Unplug a device connected to this productbefore performing repair, maintenance or service on thedevice. Failure to unplug a device before servicing it may
result in electric shock, fire, personal injury and death.
WARNING! Only use this product to power information
technology equipment that has a UL/IEC 60950-1 orequivalent rating. Attempting to power non-rated devices may
result in electric shock, fire, personal injury and death.
WARNING! Do not use a Raritan product containing outlet
relays to power large inductive loads such as motors orcompressors. Attempting to power a large inductive load may
result in damage to the relay.
WARNING! Do not use this product to power critical patientcare equipment, fire or smoke alarm systems. Use of thisproduct to power such equipment may result in personal
injury and death.
WARNING! Assembly of this product’s line cord and/or plugmust be performed by a licensed electrician and the line cordor plugs used must be suitably rated based on the product’s
nameplate ratings and national and local electrical codes.
Assembly by unlicensed electricians or failure to use suitably
rated line cords or plugs may result in electric shock, fire,
personal injury or death.
WARNING! This product contains a chemical known to theState of California to cause cancer, birth defects, or otherreproductive harm.
QS RuleSafety Instructions
1. Installation of this product should only be performed by alicensed electrician.
2. Make sure the line cord is disconnected from power
before physically mounting or moving the location of thisproduct.
3. This product is intended to be located in an equipment
rack in an information technology room. In the UnitedStates, installation must comply and be done in1

accordance with NEC (2011) Article 645 Information
Technology Equipment.
4. This product is designed to be used within an electronicequipment rack. The metal case of this product iselectrically bonded to the line cord ground wire. A
threaded grounding point on the case may be used as anadditional means of protectively grounding this productand the rack.
5. Examine the branch circuit receptacle that will supply
electric power to this product. Make sure the receptacle’s
power lines, neutral and protective earth ground pins arewired correctly and are the correct voltage and phase.
Make sure the branch circuit receptacle is protected by asuitably rated fuse or circuit breaker.
6. If the product is a model that contains receptacles thatcan be switched on/off, electric power may still be present
at a receptacle even when it is switched off.
QS RuleBefore Installation

Important: Complete and the most updated instructions on
installing a flexible cord on Raritan PDUs are included in
the Raritan PX Power Cord Installation Guide , which isavailable on the Raritan website's Support page(http://www.raritan.com/support/).

Flexible Cord Selection

Read the following precautions before installing any power
cord or plug on a PDU.
WARNING! DO NOT perform wiring assembly for thisproduct unless you are an experienced, licensed
electrician. Assembly or attempted assembly byinexperienced or unlicensed electricians may result inelectrical shock, fire, personal injury, and death. If you
are not a qualified electrician with appropriate licensing
and insurance - STOP NOW. This is work you cannot andshould not attempt. Raritan is not responsible for any
consequential damages to equipment or loss of data
due to improper installation.

FOR QUALIFIED ELECTRICIANS: Read the instructionsin their entirety before starting the installation. You
must follow all wiring instructions, ensure compliancewith national and local safety and electrical codes, andfollow all other electrical safety requirements withregard to over-current protection. STOP and contact
Raritan Technical Support if you are unsure of any
answers, or have additional questions.
QS RuleFlexible Cord Installation Instructions







The flexible cord may be permanently connected to power
subject to local regulatory agency approval. In the UnitedStates, relevant electrical regulations can be found in NEC(2011) sections 400.7(A)(8), 400.7(B), 368.56 and table
400.4.

Plug Selection
If a plug is to be attached to the flexible cord, the plug’s rated
ampacity is chosen as follows:In the United States, as specified in UL 60950-1, the plug’s
rated ampacity must be 125% greater than the Raritan
product’s rated ampacity. In some Raritan products, suchas 35A 3-phase delta wired PDUs, an exactly 125% rated
plug is not available. In these cases, choose the closest
plug that is more than 125%. For example, a 50A plug isthe closest fit for a 35A 3-phase PDU.

For all other locations, subject to local regulatory agency
policy, the plug’s rated ampacity is the same as theRaritan products rated ampacity.

The following instructions are for Raritan products
manufactured to accept user-installed flexible cords. Theseproducts are visually identified by the cable gland used to holdthe flexible cord.

Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHS

The preferred flexible cable is type SOOW, 600V, 90°C or105°C. Consult Raritan before using a different flexible
cable type.
The rated ampacity of the flexible cord must be greaterthan or equal to the Raritan product’s rated ampacity
marked on its nameplate. In the United States, relevant
ampacity ratings for flexible cords can be found inNEC(2011) section 400.5.
The number of wires in the flexible cord must match thenumber of terminals (including the ground terminal)
inside the Raritan product. See Wiring of 3-Phase In-Line
Monitors (on page 3) for exceptions.
If a plug is to be attached to the flexible cord, the length of
the flexible cord must not exceed 4.5 meters - as specified
in UL 60950-1 (2007) and NEC 645.5 (2011).

2

Receptacle Selection
For Raritan in-line monitors, any receptacle fitted to theoutlet flexible cord must have identical ratings as the plugattached to the inlet flexible cord.

Derating a Raritan ProductLower rated plugs, receptacles and flexible cords may beconnected to a Raritan product. This results in a derated(reduced) ampacity rating for the product.
Derating guidelines:

1. Choose the plug and use its rated ampacity to determine
the derated ampacity.


In the United States, as specified in UL 60950-1, thederated ampacity is 80% of the plug’s rated ampacity.
For example, a 30A plug would result in a derated
ampacity of 24A.
In other geographic locations, subject to local
regulatory agency approval, the derated ampacity is
the plug’s rated ampacity. For example, using a 16A
plug would result in a derated ampacity of 16A.

2. The derated ampacity must be marked on the Raritan
product so the new reduced rating can be easily identified.
3. For in-line monitors, the receptacles used must have thesame voltage and ampacity rating as the plug chosen instep 1.

configuration is required to specify whether the connection is
5-wire wye or 4-wire delta.

In-Line Monitor Unused Channels
It is not necessary to wire up all channels of multi-channel
in-line monitors. The inlet and outlet openings of unusedchannels must be completely closed off. “Goof plugs” for thispurpose may be a good choice if they are available in yourcountry or region.

Step by Step Flexible Cord Installation
The following items are required to complete the installation:
Flexible cord(s).

Insulated ring terminals (one for each wire) andappropriate crimp tool.
Plug(s) and receptacle(s) (for in-line monitors)
Torque screwdriver, torque nut driver and torque wrench
to tighten the wiring terminal block screws, ground nut
and cable gland nut.

To install a flexible cord:

1. Open the PDU's access panel (or in-line monitor top panel)
to expose the power wiring terminal block(s).

One-channel in-line monitor

4. The flexible cord must have a rated ampacity greater thanor equal to the derated ampacity. Since the new flexible
cord may be smaller diameter, a check must be
performed to insure the cable gland nut, when tightened,
will securely hold the flexible cord so that it cannot be
twisted, pulled or pushed in the cable gland. A sealing
ring, for small diameter flexible cords, may have been
included with the Raritan product, or one can berequested from Raritan, to reduce the inside diameter ofthe cable gland.

Zero U PDU

Wiring of 3-Phase In-Line Monitors
3-phase in-line monitors contain 4-pole wiring terminal
blocks (L1, L2, L3, N) to monitor 5-wire (4P+PE) 3-phase wye
connections. Delta wired 4-wire (3P+PE) 3-phase connections
are also permitted (no wire connected to the terminal block
neutral “N”). No additional hardware or firmware
Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHS

Make sure to locate the ground wire mounting stud(s).
There is a separate ground wire mounting stud for each3

terminal block. Each flexible cord MUST have its green(or green/yellow) ground wire bonded to a ground wire
mounting stud.

For in-line monitors, make sure to identify the inlet
terminal blocks (rear of monitor) and outlet terminal
blocks (front of monitor). Each inlet terminal block has acorresponding outlet terminal block.

NumberDescription

Inlets (labeled LINE)

Outlets (labeled LOAD)

2. Strip off the outer jacket of the flexible cord and remove
any jute, paper or other fillers. Use the following to help
determine how much jacket to remove:In the finished assembly, the outer jacket should
protrude inside the Raritan product.



The wires will have ring terminals crimped onto them.
In the finished assembly, the wires should have someslack and not be taught.
In the finished assembly, if the flexible cord slips in thecable gland placing a strain on the cord’s wires, theground wire must be the last wire to take the strain.

3. Crimp an insulated ring terminal onto each wire. A
non-insulated ring terminal may be used for the groundwire. Inspect each crimp to insure it is secure and verify
no exposed wire protrudes from the rear of an insulatedring terminal.

Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHS

4. Loosen the cable gland nut and push the flexible cord
assembly through the gland.

Temporarily hand tighten the gland nut and verify thecord cannot be twisted or pushed or pulled in the gland.
Do not proceed if hand tightening results in a loose cord.
In some models, especially in-line monitors, the flexible
cord’s diameter may be too small for the cable gland. A
sealing ring for smaller diameter line cords may havebeen included with the Raritan product, or can berequested from Raritan, to reduce the inside diameter ofthe cable gland.

5. Fasten the ring terminal of the green (or green/yellow)
ground wire to the chassis’s threaded ground stud in thisorder:
a. Place the lock washer on the stud.
b. Place the ground wire ring terminal on the stud.
c. Place the nut on the stud and tighten with a torquewrench. The appropriate torque settings vary
according to the nut size.

Nut size

Torque setting (N·m) Tolerance

M3

0.4910%M4

1.278%

M5

1.96

5%

M6

2.94

3.5%

M8

4.92%

4

end of the line cord through the CT in the direction
indicated by the arrow. For example, push the L1 line
cord wire through the CT labeled L1 and then connect
it to the L1 terminal block.

d. Check the ground wire connection. It should be secureand not move or rotate.

6. Fasten the ring terminals of all remaining wires to theterminal block and tighten each using a torquescrewdriver. The appropriate torque settings vary
according to the screw size.

Screw size

Torque setting (N·m) Tolerance

M3

0.49

10%

M4

1.27

8%

M5

1.96

5%

M6

2.94

3.5%

M8

4.92%

Make sure each ring terminal is firmly fastened andcannot be twisted by hand. Use the following guidelines tohelp terminal block wiring.
In single-phase Raritan products with world-wideratings, the terminals are labeled L1 and L2. L1 is thephase wire. L2 is either the neutral (120/230Vinstallations) or another phase wire (208Vinstallations).

For Raritan in-line monitors, where there is a one toone correspondence between plug and receptacle,
maintain the same wire colors for inlet and outlet
flexible cords.

7. Make final adjustments to the cable gland and verify thejacket of the flexible cord extends into the Raritan product.
Hand tighten the gland nut and finish tightening with atorque wrench. Appropriate torque settings vary according
to the cable gland size.

Cable gland size

Torque setting (N·m)

M12x1.5

0.7 to 0.9

M16x1.5

2.0 to 3.0

M20x1.5

2.7 to 4.0

M25x1.5

5.0 to 7.5

M32x1.5

7.5 to 10.0

M40x1.5

7.5 to 10.0

M50x1.5

7.5 to 10.0

M63x1.5

7.5 to 10.0

Note: The cable gland size is marked on the cable glandbody.
After tightening, examine the flexible cord and cablegland for the following:In all 3-phase products, L1 is phase A, L2 is phase B,
L3 is phase C and N is neutral.

If your PDU is inlet metered, such as PDU models
PX2-1nnn and PX2-2nnn (where n is a number), youmust pass each line cord wire through the correct CT
in the correct direction. Each CT is labeled andcontains a direction arrow. Push the ring terminal

Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHSMake sure you can see a few remaining threads
between the cable gland body and cable gland nut. Thegland nut must not bottom out on the gland body.

Make sure the flexible cord does not move in the cablegland when it is twisted, pushed or pulled.

8. Re-install the PDU wiring access panel or in-line monitor
cover plate. This completes internal wiring of the Raritanproduct.
9. For in-line monitors, fasten the receptacles to the outlet
flexible cords following the manufacturer’s instructions.
10. Complete the wiring of the inlet flexible cord byperforming one of these steps:

5




Assemble the plug following the manufacturer’sinstructions.
Permanently attach and strain relief the flexible cord
to a junction box following applicable electrical codes.

Raritan PX Power Cord Installation Guide
DPX-IG-1A-v3.3.0-E  255-80-6083-00 RoHS6