ADC HiGain HRE-504 User manual

HIGAIN REMOTE ENCLOSURE
USER MANUAL
HRE-504
List 1
Part Number: 150-2202-01
CLEI: T1MF3004
List 1B
Part Number: 150-2202-12
CLEI: N/A
List 2
Part Number: 150-2202-02
CLEI: T1MF4004

Revision History of This Practice 150-504-100-03
ii August 1, 2002 HRE-504 List 1, List 1B, and List 2
REVISION HISTORY OF THIS Manual
Copyright
August 1, 2002
© 2002 ADC DSL Systems, Inc. All rights reserved.
Trademark Information
ADC is a registered trademark of ADC Telecommunications, Inc. HiGain is a registered trademark of ADC DSL Systems, Inc.
No right, license, or interest to such trademarks is granted hereunder, and you agree that no such right, license, or interest
shall be asserted by you with respect to such trademark.
Other product names mentioned in this document are used for identification purposes only and may be trademarks or
registered trademarks of their respective companies.
Disclaimer of Liability
Information contained in this document is company private to ADC DSL Systems, Inc., and shall not be modified, used, copied,
reproduced or disclosed in whole or in part without the written consent of ADC.
Contents herein are current as of the date of publication. ADC reserves the right to change the contents without prior notice.
In no event shall ADC be liable for any damages resulting from loss of data, loss of use, or loss of profits, and ADC further
disclaims any and all liability for indirect, incidental, special, consequential or other similar damages. This disclaimer of
liability applies to all products, publications and services during and after the warranty period.
Revision Release Date Revisions Made
01 January 20, 1999 Initial release
02 May 10, 2000 Changed from plastic to metal control valves and added HRE-504 List 1B.
03 August 01, 2002 ADC Rebranding

150-504-100-03 Using This Technical Practice
HRE-504 List 1, List 1B, and List 2 August 1, 2002 iii
USING THIS Manual
Three types of messages, identified by icons, appear in text.
For a list of abbreviations used in this document, refer to “Appendix D - Abbreviations” on page 45.
INSPECTING THE SHIPMENT
Upon receipt of the equipment:
•Unpack each container and inspect the contents for signs of damage. If the equipment has been damaged in
transit, immediately report the extent of damage to the transportation company and to ADC. Order
replacement equipment, if necessary.
•Check the packing list to ensure complete and accurate shipment of each listed item. If the shipment is short
or irregular, contact ADC as described in the Warranty located inside the back cover. If you must store the
equipment for a prolonged period, store the equipment in its original container.
Notes contain information about special circumstances.
Cautions indicate the possibility of equipment damage or personal injury.
The Electrostatic Discharge (ESD) susceptibility symbol indicates that a device or assembly is
susceptible to damage from electrostatic discharge.

Inspecting the Shipment 150-504-100-03
iv August 1, 2002 HRE-504 List 1, List 1B, and List 2

150-504-100-03 Table of Contents
HRE-504 List 1, List 1B, and List 2 August 1, 2002 v
TABLE OF CONTENTS
Overview ____________________________________________________________________________ 1
Features..............................................................................................................................................1
Applications .......................................................................................................................................1
Pressurized Applications....................................................................................................................2
Functional Description.......................................................................................................................4
Gel-filled Stub Unit .............................................................................................................4
Air-filled Stub Unit..............................................................................................................5
Installation___________________________________________________________________________ 7
Unpacking and Inspecting the Shipment ...........................................................................................7
Mounting the Enclosure.....................................................................................................................8
Pedestal or Small Pole Mounting ........................................................................................9
Large Pole Mounting.........................................................................................................10
Flat Surface Mounting.......................................................................................................10
Rack Mounting ..................................................................................................................11
Grounding the Enclosure .................................................................................................................12
Grounding a Pole Mounted Enclosure...............................................................................12
Grounding a Flat Surface Mounted Enclosure ..................................................................14
Installing Doubler or Repeater Units ...............................................................................................16
Detaching the Dome from the Baseplate .........................................................................................17
Opening the Enclosure.....................................................................................................................18
Opening a Gel-Filled Enclosure ........................................................................................18
Opening an Air-filled Enclosure........................................................................................18
Closing the Enclosure ......................................................................................................................19
Pivoting the Enclosure.....................................................................................................................20
Appendix A - Technical Reference ______________________________________________________ 21
Bar Code and Configuration Number Information..........................................................................21
Enclosure Information......................................................................................................................22
Stainless Steel Dome .........................................................................................................22
Card Cage ..........................................................................................................................23
Lightning Protection Unit..................................................................................................25
Cable Stub and Pressurization...........................................................................................25
Vented-to-Pressurized Conversion Procedure...................................................................26
Spare Connections.............................................................................................................27
Order Wire Connections....................................................................................................27

Table of Contents 150-504-100-03
vi August 1, 2002 HRE-504 List 1, List 1B, and List 2
Wiring Procedures........................................................................................................................... 28
General Deployment Rules.............................................................................................................. 30
Maintenance Procedures.................................................................................................................. 32
Splicing ............................................................................................................................. 32
Pre-splicing Procedure...................................................................................................... 32
Splicing Procedure............................................................................................................ 34
Post-splicing Procedure..................................................................................................... 35
Replacement Parts........................................................................................................................... 37
Valve Replacement Procedures....................................................................................................... 39
Pressure Relief Valve........................................................................................................ 39
Breather Vent Valve.......................................................................................................... 39
Air Stem Valve..................................................................................................................40
Air Pressure Cutoff Valve................................................................................................. 40
Appendix B - Specifications ____________________________________________________________ 42
Appendix C - Product Support _________________________________________________________ 43
Technical Support............................................................................................................................ 43
World Wide Web............................................................................................................................. 43
Returns............................................................................................................................................. 43
Appendix D - Abbreviations ___________________________________________________________ 45
Certification and Warranty______________________________________________ Inside Back Cover

150-504-100-03 List of Figures
HRE-504 List 1, List 1B, and List 2 Augusr 1, 2002 vii
LIST OF FIGURES
1. HRE-504 List 2 Air-filled Remote Enclosure.................................................................................................2
2. Metal Valves....................................................................................................................................................3
3. HRE-504 List 1 Gel-Filled Remote Enclosure................................................................................................5
4. Mounting Bracket............................................................................................................................................8
5. Grounding for Pole Mounted Unit ................................................................................................................13
6. Grounding for Flat Surface Mounted Unit....................................................................................................15
7. Detaching the Dome from the Baseplate.......................................................................................................17
8. Label Locations.............................................................................................................................................21
9. HRE-504 List 1 and List 2 Enclosure Dimensions .......................................................................................22
10. HRE-504 Top View with Cover Removed ...................................................................................................23
11. HRE-504 Front and Rear Views....................................................................................................................24
12. Lightning Protection Unit..............................................................................................................................25
13. HRE-504 Interface Wiring Diagram and Cable Assignments ......................................................................29
14. Cable Stub Construction................................................................................................................................32
15. Dress Splice in Splice Case...........................................................................................................................34
16. Post-Splicing Procedure ................................................................................................................................36
17. Screen Folding Diagram................................................................................................................................37
18. T-Screen Color Code Specifications (28-Pair Cable) ...................................................................................42
LIST OF TABLES
1.Slot Pin Assignments......................................................................................................................................16
2.HRE-504 Label Description...........................................................................................................................21
3.HRE-504 Cable Stud Wire Pair Assignments for Doubler and Remote Units ..............................................28
4.Doubler Deployment Rules............................................................................................................................30
5.Replacement Part Kits....................................................................................................................................38

List of Tables 150-504-100-03
viii Augusr 1, 2002 HRE-504 List 1, List 1B, and List 2

150-504-100-03 Overview
HRE-504 List 1, List 1B, and List 2 August 1, 2002 1
OVERVIEW
The ADC®HRE-504 List 1, List 1B, and List 2 are outdoor, stainless steel, weatherproof enclosures designed to
house up to four HiGain®remote or doubler units. The HRE-504 is part of a HiGain system.
FEATURES
The following features are included on the HRE-504 weatherproof enclosures:
•Four doubler card slots
•30 foot (9.14 m) gel- or air-filled 28-pair cable stub (HRE-504 List 1 and List 2) or 100 foot (4,000 m)
gel-filled 28-pair cable stub (HRE-504 List 1B)
•Flat surface, rack, or pole mount
•Primary surge protection
•Seamless stainless steel cover
•Single stub access
•Unique card guides automatically adapt every slot to three mechanics
APPLICATIONS
The primary application of the HRE-504 remote enclosure is to house HiGain doubler units in an HDSL/T1
transmission system. The HRE-504 is an outdoor enclosure with four single-width mechanical slots. It has a single
gel-filled stub (HRE-504 List 1 and List 1B) or air-filled stub (HRE-504 List 2).
The gel-filled unit is intended for aboveground pole mounting applications that do not require pressurization
through the cable stub. However, if you prefer to pressurize the unit, it can be locally pressurized by an optional
pressure relief valve, as shown in Figure 1 on page 2.
The air-filled unit is intended for underground installations. It can be pressurized from the main feeder cable
through its air-core stub. The pressurization prevents the enclosure from flooding when mounted in underground
manholes.
Both units have primary gas-tube surge protection on all cable pairs.
The HRE-504 can be used to house the following doubler and repeater units:
•HDU-439, HDU-437, HDU-409 or HDU-407 Full T1 unit (1.544 Mbps)
•HDU-219 or HDU-217 Fractional T1 unit (0.772 Mbps)
•EDU-842 ETSI unit (2.048 Mbps) and EDU-409 E1 unit (2.048 Mbps)
•ISDN repeater
•DDS repeater
•239 T1 repeater
All doublers and repeaters share the same generic slot pair assignments as shown in Table 1 on page 16.

Overview 150-504-100-03
2 August 1, 2002 HRE-504 List 1, List 1B, and List 2
PRESSURIZED APPLICATIONS
For pressurized applications on the HRE-504 List 2, the Schrader air stem valve isused. A pressure gauge attaches
to the valve for the purpose of measuring the internal pressure of the enclosure. This valve is also used to relieve
the internal pressure prior to opening and removing the dome cover. This can be done by depressing the center pin
on the valve. Figure 1 below and Figure 2 on page 3 show the Schrader air stem valve location.
Figure 1. HRE-504 List 2 Air-filled Remote Enclosure
An optional breather vent assembly is enclosed in the air-filled HRE-504 List 2 shipping kit. The kit is a small
plastic bag attached to a red and brown-colored spare pairs shrink tube. The breather vent replaces the pressure
relief valve, if the air-filled unit is not pressurized. The assembly allows the enclosure to breathe and keeps the
internal atmosphere free of harmful contaminants. Figure 2 on page 3 shows the four metal valves.
This depressurizing must be performed every time the cover is removed from the enclosure.
Failure to do so may cause personal injury or damage to the equipment.
Unlike the gel-filled unit, the pressure cutoff valve in the air-filled unit cannot be used to cut off
an external source that is applied to the Schrader air stem valve. The air-filled unit pressure
cutoff valve can only control the air source that is applied to the enclosure through the air core
stub.
Pressure-
cutoff valve
BottomView
Cable stub
entry
Optional pressure
relief valve or
breather-vent
Order wire
terminal
Grounding
lug
Schrader air-stem
valve and cap
Stainless steel
dome
Metal
locking
clamp
Order wire
Terminal
T-bar
lockable guard
FrontView
Internal pressure
cutoff valve
Cable stub
Pressure
relief
valve

150-504-100-03 Overview
HRE-504 List 1, List 1B, and List 2 August 1, 2002 3
Figure 2. Metal Valves
Brass
fitting Brass fitting
Body
housing O-rings Adjustment knob
Limiting
nut
Brass
fitting
O-rings O-rings
O-rings Breather
vent valve Insect
screen
Air inlet
Air outlet
Adapter Breather
adapter
Baseplate
outer surface Baseplate outer surface
Baseplate
outer surface
Baseplate
outer surface
Baseplate connection
Cap
Valve cap
Air stem valve
PRV
A. Pressure Relief Valve (PRV)
B. Breather VentValve (BVV)
C. Air Stem Valve (ASV)
(List 2 only)
D. Pressure Cutoff Valve (PCV)
E. Air Stem/Air IntakeT-valve (List 1 only)
Air stem
valve Valve cap
Air intake

Overview 150-504-100-03
4 August 1, 2002 HRE-504 List 1, List 1B, and List 2
FUNCTIONAL DESCRIPTION
The following section discusses the function of each component on the HRE-504. The enclosure consists of an
aluminum card cage with a holding capacity for up to four doubler units, a stainless steel composite baseplate, and
a stainless steel cover that maintains weathertight integrity.
Gel-filled Stub Unit
The gel-filled HRE-504 List 1 and List 1B stub units are equipped with three metal valves installed in the base
section, as shown in Figure 3. The gel-filled screened 28-pair, 24 American Wire Gauge (AWG) cable stub on the
gel-filled units are equivalent to an ALP FTS-PIC filled-core telephone cable. The unit has foam skin insulation
with a single-filled jacket. This insulation allows the cable stub on the gel-filled unit to be used in buried, aerial,
and duct applications.
Standard color codes are used for pair identification with color compounds chosen for electrical balance and
permanency. The outer jacket consists of material that provides protective covering from sunlight, atmospheric
temperatures, ground chemicals, and stresses expected in standard installations.
The gel-filled unit is similar to the air-filled unit, except that the gel-filled unit has a breather vent valve instead
of a pressure relief valve. The breather vent valve allows the circulation of outside air through the gel-filled
enclosure when it is not pressurized. The enclosure must breathe to prevent excess moisture and other damaging
contaminants from accumulating within the enclosure.
A combined Schrader air stem and external air intake T-valve is also indicated with the gel-filled unit. The
Schrader air stem valve can be used to connect to an external air source or release the internal pressure whenever
the dome is to be removed. Adjacent to the Schrader valve, the external air intake valve accepts tubing for
connection to anexternal air source.The pressure cutoff valve allows the external source of air to be cut off, when
the valve is closed.
An optional external pressure relief valve is included in the shipping kit for the gel-filled unit. The kit comes in a
small plastic bag that is attached to the shrink tabs of one of the spare pairs. Use the pressure relief valve in place
of the breather vent assembly when the gel-filled unit is to be locally pressurized.
The gel-filled HRE-504 List 1 and List 1B are identical, except for the cable stub. The cable stub
for the HRE-504 List 1 is 30 ft (9.14 m) and for the HRE-504 List 1B is 100 ft (30.48 m).
The cable complies with the requirements of the American National Standards Institute (ANSI)
and the Insulated Cable Engineers Association (ICEA) S-84-608-1994 and REA PE-89.

150-504-100-03 Overview
HRE-504 List 1, List 1B, and List 2 August 1, 2002 5
Figure 3. HRE-504 List 1 Gel-Filled Remote Enclosure
Air-filled Stub Unit
The air-filled cable stub on the HRE-504 List 2 unit, as shown in Figure 1 on page 2, is equivalent to an ALP
FTS-PIC air-core telephone cable. The unit comes with three metal valves: internal air pressure cutoff valve,
Schrader air stem valve, and pressure relief valve. The air cutoff valve is used to shut off the inlet air supply that
is pumped from the main feeder cable through the 30 foot (9.14 m) stub into the HRE-504 enclosure.
The air-filled HRE-504 List 2 unit is intended for buried, aerial, and duct applications. Standard color codes are
used for pair identification with color compounds chosen for electrical balance and permanency. An inner-core
jacket protects the core and provides improved mechanical and electrical characteristics. The outer jacket provides
protective covering that withstands exposure to sunlight, atmospheric temperatures, ground chemicals, and
stresses expected in standard installations.
The HRE-504 cable sealing, O-ring, and V-Band seal have been safely tested to 36 pounds per square inch (PSI).
Most cables become ruptured or damaged at this pressure level. However, the HRE-504 cable sealing is designed
to handle this amount of pressure.
The common pressure supplied through the cable is approximately 9 PSI. This is sufficient to prevent water from
entering the cable or housing. ADC recommends pressurizing the enclosure to a maximum of 12 PSI.
The cable complies with the requirements of ANSI/ICEA S-85-625-1994 and REA PE-22.
Avoid using pressures above 36 PSI. Such pressures could force the V-Band away from
the flange and, in effect, impel the dome away from the housing. This could cause damage
or injury.
Grounding lug
Cable stub entry Pivot bracket
Order wire terminal
Optional
breather vent valve
pressure relief valve
or
V-Band T-handle
Pressure cutoff valve
Air stem/Air intakeT-valve
BottomView
To pressure
supply
Pressure supply
connection
(1/2"/24 thread)
Air stem

Overview 150-504-100-03
6 August 1, 2002 HRE-504 List 1, List 1B, and List 2
Air-filled Stub Presentation
This unit has an air pressure cutoff valve, air stem Schrader valve, and pressure relief valve. In the HRE-504
enclosure, the air pressure cutoff valve is used to shut off the inlet air supply that is pumped from the main feeder
cable through the 30 foot (9.14 m) stub.
•To shut off the inlet air supply, turn the air-cutoff valve clockwise 1 full turn.
•To turn on the inlet air supply, turn the air-cutoff valve counterclockwise 1 full turn.
To avoid pressure buildup, the pressure relief valve is set to release air at a maximum pressure
of 15 PSI. Due to manufacturing tolerances of the springs, this maximum pressure has a
tolerance of ± 3 PSI. This pressure and tolerance are well within the safety concerns that may
apply to the housing, personnel, or cable.
The pressure relief valve is not intended for controlling the air pressure that is being applied to
the housing cable.

150-504-100-03 Installation
HRE-504 List 1, List 1B, and List 2 August 1, 2002 7
INSTALLATION
This section describes HRE-504 installation, including the following:
•Unpacking and Inspecting the Shipment
•Mounting the Enclosure
•Grounding the Enclosure
•Installing Doubler or Repeater Units
•Detaching the Dome from the Baseplate
•Opening the Enclosure
•Closing the Enclosure
•Pivoting the Enclosure
UNPACKING AND INSPECTING THE SHIPMENT
When you receive the equipment, inspect it for signs of damage. If damage has occurred, immediately report the
extent of damage to the transportation company and ADC. For additional information, see “Appendix C - Product
Support” on page 43.
Your shipment should consist of:
•One HRE-504
•HiGain Remote Enclosure HRE-504 List 1 and List 2 Technical Practice
Before installing the HRE-504, unpack and inspect the shipment for missing components and physical damage
that may have occurred during shipping.
To unpack the enclosure:
1Remove the HRE-504 from its shipping carton. Verify that all the equipment listed on the packing list is
present.
2Inspect the enclosure, card cage, and O-ring for shipping damage.
3If the equipment has been damaged in transit, immediately report the damage to the transportation company
and to your sales representative. Order replacement equipment, if necessary.
4On the rearbase of the card cage, loosen the retaining screws.
5Tilt the card cage on its hinge. Lower the card cage to its level position and tighten the screws to lock in
position. ADC recommends that the card cage be kept in a level, locked position.
If you must store the equipment for a prolonged period of time, store it in the container shipped
with your equipment.

Installation 150-504-100-03
8 August 1, 2002 HRE-504 List 1, List 1B, and List 2
MOUNTING THE ENCLOSURE
The HRE-504 may be mounted in a rack, pole, pedestal, or flat surface using the enclosure mounting bracket
assembly. Figure 4 below shows the mounting bracket.
This section contains separate mounting instructions for each of these installation, as follows:
•Pedestal or pole mounting with a diameter less than or equal to 7 inches (17.78 cm), see “Pedestal or Small
Pole Mounting” on page 9.
•Pole mounting with a diameter greater than 7 inches or (17.78 cm), see “Large Pole Mounting” on page 10.
•Flat surface mounting, see “Flat Surface Mounting” on page 10.
•Rack mounting, see “Rack Mounting” on page 11.
A mounting template drawing is included with the bracket to help you locate the correct mounting hole for each
installation.
Figure 4. Mounting Bracket
For all installations, the enclosure must be mounted vertically. In addition, a shady location is
preferred to minimize thermal stress. Refer to Table 4 on page 30 for thermal load capacity
information.
While mounting the enclosure using any of these procedures, hold the enclosure securely to
prevent personal injury or damage to the enclosure.
Because of the size and weight of the enclosure, you may want to remove the dome before
beginning the mounting procedure. For more information, see “Detaching the Dome from the
Baseplate” on page 17.

150-504-100-03 Installation
HRE-504 List 1, List 1B, and List 2 August 1, 2002 9
Pedestal or Small Pole Mounting
Use the procedure below to mount the enclosure on a pole or pedestal where the pole is less than 7 inches
(17.78 cm) in diameter.
Have the following equipment ready before you begin this procedure:
•Two 3/8-inch (0.952 cm) lag bolts, 4 inches (10.16 cm) long minimum
•Two 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, follow these steps:
1Select a mounting location on the pole or pedestal.
2Remove the mounting bracket from the HRE-504 by removing the four bolts that connect each side plate, as
shown in Figure 4 on page 8.
3Position the mounting bracket with the stub down against the pole or pedestal (stub down) and mark the
location of the center mounting holes. Use the two middle mounting holes for this application. Remove the
mounting bracket.
4Drill two 1/4-inch (0.635 cm) diameter mounting holes at the locations marked in Step 3. Each hole should be
drilled approximately 3 inches (7.62 cm) into the pole.
5Start a lag bolt in the top mounting hole by tightening the lag bolt into the pole or pedestal approximately
2/3-inch (1.7 cm).
6Insert a lag bolt into the bottom hole of the mounting bracket and tighten the bolt.
7Secure the enclosure bracket to the pole or pedestal by securely tightening the two lag bolts.
8Reattach the enclosure to the mounting bracket and torque the four mounting bracket bolts to 30 to 40
inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the pole or pedestal tothe splice case.
If the cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the pole or pedestal
to the splice case.

Installation 150-504-100-03
10 August 1, 2002 HRE-504 List 1, List 1B, and List 2
Large Pole Mounting
Use the procedure below to mount the enclosure on a pole with a diameter greater than 7 inches (17.78 cm).
Figure 4 on page 8 shows the mounting bracket.
Have the following equipment ready before you begin:
•Four 3/8-inch (0.952 cm) lag bolts, 4 inches (10.16 cm) long minimum
•Four 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, follow these steps:
1Select a convenient mounting location on the pole.
2Remove the enclosure base mounting bracket by removing the four bolts that connect each side plate, as
shown in Figure 4 on page 8.
3Position the mounting bracket with the stub down against the pole and mark the location of the top outside
holes. Use the four corner mounting holes for this application. Remove the mounting bracket.
4Drill four 1/4- inch (0.635 cm) diameter by 3-inch (7.62 cm) deep holes at the locations marked in Step 3.
5Start a lag bolt in each of the two top matched bolt mounting slots by tightening them into the pole
approximately 2/3of an inch.
6Insert the lag bolts into the two holes on the outside bottom of the mounting bracket. Tighten the lag bolts.
7Secure the enclosure bracket to the pole by securely tightening all lag bolts.
8Reattach the enclosure base mounting brackets with the four side plate bolts and torque the mounting bracket
bolts to 30 to 40 inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the pole to the splice case. If the
cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the pole to the splice case.
Flat Surface Mounting
Use the procedure below to mount the enclosure on a flat surface or in a manhole. You must allow room for
enough top clearance to remove the cover. Allow at least 3 inches (7.62 cm) of clearance above the dome if the
31° tilt feature is used. Allow at least 10 inches (25.4 cm) of clearance if the tilt feature is not used.
Have the following equipment ready before you begin this procedure:
•Four 3/8-inch (0.952 cm), 16 NC anchor bolts, 2-1/2inches (6.35 cm) long for wall mounting
•Four 3/8-inch (0.952 cm) washers
•One wrench
•One pencil
•One drill with a 1/4-inch (0.635 cm) bit
To mount the enclosure, follow these steps:
1Select a mounting location on a flat surface.
2Remove the enclosure base mounting bracket by removing the four bolts that connect each side plate, as
shown in Figure 4 on page 8.

150-504-100-03 Installation
HRE-504 List 1, List 1B, and List 2 August 1, 2002 11
3Position the mounting bracket against the wall and mark the location of the four outside mounting holes.
Remove the mounting bracket.
4Drill four 1/4-inch (0.635 cm) diameter by 2-1/2inch (6.35 cm) deep holes at the locations marked in Step 3.
5Start an anchor bolt in each of the two top, bolt-mounting slots and tighten the bolts into the wall
approximately 2/3of an inch of the bolt length.
6Insert and tighten the anchor bolts into the two bottom holes located on the outside of the mounting bracket.
7Secure the enclosure bracket to the wall by securely tightening all anchor bolts.
8Reattach the enclosure base mounting brackets to the mounting bracket with the four side plate bolts and
torque the mounting bracket bolts to 30 to 40 inch-pounds (3.4 to 4.5 Newton-meters).
9If the cable stub connects to an underground cable, dress the cable down the wall to the splice case. If the
cable stub connects to an aerial cable, form a drip loop in the cable and dress it up the wall to the splice case.
Rack Mounting
Have the following equipment ready before you begin this procedure:
•Four 3/8-inch (.95 cm) thru-bolts for rack mounting.
•Four 3/8-inch (.95 cm) non-metallic washers. Non-metallic washers are required to avoid a ground loop
that may result if both the rack and the enclosure are grounded. Do not use the rack ground for the
enclosure ground since its integrity is not 100 percent reliable.
•One wrench.
To mount the enclosure, follow these steps:
1Select a convenient location on the cable rack.
2Position the enclosure so the outside slots and holes in the mounting bracket align with the mounting holes in
the cable rack.
3Slide the thru-bolts with nonmetallic washers through the outside slots and holes of the mounting bracket.
Begin tightening the bolts into the mounting holes.
4Secure the enclosure to the rack by tightening the thru-bolts.
The desiccant bags shipped with the unit must be activated prior to closing the lid. Do this by
removing the bags from their plastic container and placing them inside the enclosure.

Installation 150-504-100-03
12 August 1, 2002 HRE-504 List 1, List 1B, and List 2
GROUNDING THE ENCLOSURE
Use the standard grounding procedure in “Grounding a Pole Mounted Enclosure” below.
The HRE-504 requires a resistance of 25 Wor less to ground as measured with a Megger-type ohmmeter.
Have the following equipment ready before you begin:
•One bullet bond
•One ground rod for pole mounted enclosures (may require more than one rod)
•One Megger-type ohmmeter
•One 6 AWG cable
To establish enclosure ground, the cable stub’s 8 mil aluminum shield is attached to the card cage mounting
brackets through a braided jumper wire. This jumper wire connects the stub aluminum shield to the enclosure
ground lug, as shown in Figure 11 on page 24. The jumper may need to be temporarily removed from the
enclosure ground lug when troubleshooting ground faults. This is accomplished by removing the screw that
secures the jumper wire to the card cage mounting bracket.
Grounding a Pole Mounted Enclosure
Use the following procedure to ground a pole or pedestal mounted enclosure, as shown in Figure 5 on page 13.
1Bond the main cable shield through the splice case using bullet bond.
2Drive the ground rod into the ground near the enclosure location.
3Use a Megger-type ohmmeter to measure the resistance between enclosure ground and the ground rod. The
resistance must be 25 Wor less.
4If the resistance requirement is met, proceed to Step 5. If the requirement is not met, follow local practices to
lower the resistance to ground to comply with the requirement before proceeding to Step 5.
5Use 6 AWG cable to connect the grounding lug on the enclosure to the ground rod. Torque the grounding lug
to 18 and 22 inch-pounds (2.0 and 2.5 Newton/meters).
The 8 MIL aluminum shield on the stub is connected to the card cage mounting brackets by a
braided shield ground wire. This wire connects the shield to the enclosure ground lug. The wire
may be temporarily removed from the enclosure ground lug when troubleshooting ground
faults. Loosen the enclosure screws that secure the braided shield ground wire to the card cage
mounting bracket.
The braided shield ground wire should bereconnected to the card cage bracket after completing
the ground fault test. This ensures that the stub’s shield is properly grounded (required to
reduce the possibility of shield corrosion and lightning damage).
The stub’s screen divider is an insulated floating divider separating the Group 1 and Group 2
pairs from the Group 3 and Group 4 pairs. Do not ground this screen divider: doing so could
result in degraded performance.
Ground the HRE-504 before splicing the cable stub into the main cable. This grounding method
or an accepted local grounding method must be in effect at all times to safeguard personnel.
If the HRE-504 is improperly grounded, the LPU surge arrestors will not work and the enclosure
will be unprotected.