Equipment Room Hardware And Cabling Installation. AT&T System 75, 75 XE

Document

Equipment Room Hardware And Cabling Installation

Equipment Room Hardware And Cabling

Installation

Hardware Installation

The procedures, provided in this guide, for installing hardware are written so that one system technician can do the installation. Procedures are provided for installing the following:

● Cross-connect field

●

Cable slack managers

●

Labels for cross-connect field

●

Sneak fuse panels.

Installing the Cross-Connect Field

The preferred cross-connect field location is directly behind the switch cabinet.

Wall Mounting 110A-Type Terminal Blocks

The 110A-type hardware can be stacked in almost any arrangement at

any height or location on the wall. One arrangement is shown in Figure

3-10. The distance between the mounting screw holes on the terminal

blocks is 10-13/16 inches. If a vertical patch cord trough is to used, the distance between the mounting screw holes is 5-5/16 inches.

Wall Mounting 110P-Type Terminal Blocks

The first terminal block of the trunk/auxiliary field is aligned with the left

side of the switch cabinet (Figures 3-11 or 3-12). This arrangement

allows for growth on the right side of the cross-connect field.

To install the cross-connect field, proceed as follows:

1. If 300-pair terminal blocks are to be installed, draw a level horizontal

line on the wall 47-1/2 inches above the floor (Figure 3-14). If

900-pair terminal blocks are to be mounted, draw a level horizontal

line on the wall 23 inches above the floor (Figure 3-15).

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CHAPTER 3. EQUIPMENT ROOM DESIGN

48 INCHES

AC POWER

STRIP

HORIZONTAL

LINE

80-1/2 INCHES

7-11/16 INCHES

7/8 INCH

5-5/16 INCHES

47-1/2 INCHES

FLOOR LINE

Figure 3-14. Mounting 300-Pair 110P-Type Terminal Blocks

(Approximately 288 4-Pair or 384 3-Pair Station

Capacity Illustrated)

To mount the first trunk/auxiliary field terminal block, partially install two 3/4-inch No. 12 wood screws, 7-11/16 inches apart on the left side of the horizontal line on the wall

Slide the bottom terminal block feet onto the mounting screws and mark the upper mounting screw locations.

Remove the terminal block and partially install the upper mounting screws.

Place the terminal block on the mounting screws and tighten the screws.

If a vertical patch cord trough is to be installed, partially install the first screw for the patch cord trough, on the line, 7/8 inch to the right

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Equipment Room Hardware And Cabling Installation

49 INCHES

HORIZONTAL

LINE

AC POWER

STRIP

7-11/16 INCHES

47-1/2 INCHES

HORIZONTAL

LINE

96 INCHES

7-11/16 INCHES 5-5/16 INCHES

7/8 INCH

23 INCHES

FLOOR LINE

Figure 3-15. Mounting 900-Pair 110P-Type Terminal Blocks

(Approximately 432 4-Pair or 576 3-Pair Station

Capacity Illustrated) of the previous screw. Partially install the second mounting screw

5-5/16 inches to the right of the screw just installed. Repeat Steps

3, 4, and 5.

7 .

If another trunk/auxiliary field terminal block is to be installed, partially install the first screw for the terminal block, on the line, 7/8 inch to the right of the previous screw. Partially install the second

3-27

CHAPTER 3. EQUIPMENT ROOM DESIGN mounting screw 7-11/16 inches to the right of the screw just

installed. Repeat Steps 3, 4, and 5.

If a horizontal patch cord trough is to be installed, install it, on the line, between the trunk/auxiliary field and the distribution field.

To install the first distribution field terminal block, partially install two 3/4-inch, No. 12 wood screws, 7-11/16 inches apart on the line,

to the right of the vertical patch cord trough. Repeat Steps 3, 4, and

10.

If another distribution field terminal block is to be installed, partially install the first screw for the terminal block, on the line, 7/8 inch to the right of the previous screw. Partially install the second mounting screw 7-11/16 inches to right of the screw just installed. Repeat

steps 3, 4, and 5.

11.

If a vertical patch cord trough is to be installed in the distribution

field, go to Step 6.

12.

Repeat Steps 10 and 11 until all the terminal blocks and vertical patch cord troughs in the distribution field have been installed.

Frame Mounting 110P-Type Terminal Blocks

The 900-pair 110P-type terminal blocks and the associated patch cord troughs can also be mounted on a free-standing, floor-mounted 1110A2

apparatus mounting frame (Figure 3-16). Each 1110A2 apparatus

mounting frame provides the space to mount five terminal blocks/patch cord troughs on each side of the frame. A cable support structure, apparatus mounting 1110C1, mounts directly on top of the 1110A2 apparatus mounting frame and provides support for all cables routed to and from the frame.

3-28

NO. 1110C1

APPARATUS

MOUNTING

NO. 111OA2

APPARATUS

MOUNTING

Equipment Room Hardware And Cabling Installation

76.00"

88.50"

43.50"

Figure 3-16. 1110A2 and 1110C1 Apparatus Mountings

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CHAPTER 3. EQUIPMENT ROOM DESIGN

APPARATUS MOUNTING FRAME ORDERING INFORMATION

Code Number

1110A2

Description Comcode

1110C1

1110A1

2110A1

2110B1

Apparatus Mounting Frame 104 032 495

Cable Support Assembly 104 175 120

End Dress Panel 104 176 268

Top Dress Panel 104 176 276

Bottom Dress Panel 104 176 284

Wall Mounting 66-Type Connecting Blocks

The first column of 66-type connecting blocks should be aligned with

the left side of the switch cabinet (Figure 3-7). This arrangement allows

for orderly growth toward the right side of the cross-connect field.

The connectorized 66-type connecting blocks are factory wired for cable routing from the top so that the cable connector will align with the connector on the connecting block. If cable routing from the bottom is desired, then the connector on the connecting block must be removed and rotated 180 degrees. Then, the connector must be relocated in the previously unoccupied hole because the connecting block leads are not long enough to reach the hole where the connector was previously mounted. The VELCRO® cable retainer must also be relocated.

To install the cross-connect field, proceed as follows:

1. Draw a level horizontal line on the wall 12 inches above the floor

(Figure 3-17).

* Registered trademark of VELCRO U.S.A. Inc..

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78 1/2 INCHES

Equipment Room Hardware And Cabling Installation

AC POWER

STRIP

12 INCHES

FLOOR LINE

Figure 3-17. Cross-Connect Field Installation, 66-Type Connecting

Blocks

Place bottom of the first backboard/connecting block on the line and align it vertically with the left side of the switch cabinet. Mark the mounting holes.

Remove the backboard/connecting block and drill holes in the wall for 3/4-inch No. 12 wood screws.

Move the backboard/connecting block into place and fasten it to the wall with 3/4-inch No. 12 wood screws.

The next backboard/connecting block can be mounted to the right or above the one just installed, depending on space requirements.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Repeat Steps 2, 3 and 4 until each backboard or connecting block

has been installed.

Note: The 66-type connecting blocks should not be installed more than 78-1/2 inches above the floor.

Installing Cable Slack Managers

To install the cable slack managers (Figure 2-17), proceed as follows:

Place the Z113A cable slack manager against the wall under the

cross-connect field (Figure 3-9), aligning the left side of the cable

slack manager with the first terminal block of the trunk/auxiliary field.

Place the next cable slack manager beside the previously installed cable slack manager. Align the tabs and interlocks, and snap the cable slack managers together.

Repeat Step 2 until all cable slack managers are installed.

Note: Nine holes (¼-inch) are provided in a cable slack manager base in the event earthquake mounting is required. Also, if a cable slack manager base is mounted on an uneven floor, shims may be required to level it and insure proper fit of the covers. Holes are provided in the sides of the base for bolting cable slack managers together. Bolts and shims must be obtained locally.

Labeling the Cross-Connect Field

Labeling 110-Type Terminal Blocks

Figure 3-18 shows the graphic symbols used (instead of words) on

labels for the switch, cross-connections, information outlets, and cables for the system. The labels are color-coded to identify system wiring as follows:

●

Green—Leads to CO

●

Purple—Leads to switch ports

●

Yellow—Leads to auxiliary equipment and miscellaneous switch leads

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Equipment Room Hardware And Cabling Installation

●

Blue—Leads to information outlets

● White—Leads from the cross-connect field to the satellite locations (3-pair).

Cabinet

Carrier

Designations

1, 2, 3 . . . n

A, B, C, D, E

Slot

1 , 2 , 3 . . . 2 0

Information Outlet

Site/Satellite Closet

1 , 2 , 3 . . . 5 6 0

A, B, C, D, E, F

Tie Circuit

Floor

Building

Write Floor or

Building Identification on Label as Required for Easy Identification.

1, 2, 3 . . . n

Figure 3-18. System Label Graphic Symbols and Designation

Nomenclature

Each 110-type label is used to identify 2 rows on the 110-type terminal block. The upper half of the label identifies the row above it and the lower half of the label identifies the row below it. The labels are inserted

into the clear plastic designation strips (Figure 3-19) that are furnished

with the 110-type terminal blocks. After the label has been inserted into the designation strip, the designation strip is snapped into place

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CHAPTER 3. EQUIPMENT ROOM DESIGN between the 110-type terminal block rows. Label code number 220A

(comcode 103 970 000) contains all of the 110-type labels.

CLEAR PLASTIC

DESIGNATION

STRIP

Figure 3-19. Clear Plastic Designation Strip

CO Trunk Labels (Green)

The labels shown in Figure 3-20 identify the network interface leads for

trunk circuits. On the top label, cable pairs are numbered consecutively from 1 to 300 (in groups of five). The bottom label is blank and must be filled in manually as required.

Label Code 221A—Green Labels (comcode 103 970 018)

Label code number 221A contains the following CO trunk labels:

●

(6) green trunk labels (Figure 3-20). The labels are numbered from

1 to 300. Each label identifies 50 trunk pairs.

●

(4) unnumbered green labels (Figure 3-20). Each label identifies

50 trunk pairs.

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Equipment Room Hardware And Cabling Installation

GREEN

3 0

● USAGE:

IDENTIFIES NETWORK INTERFACE TRUNK PAIRS.

● CODE NO:

221A

2 0

4 5

GREEN

2 5

5 0

● USAGE:

CUSTOMER IDENTIFICATION OF NETWORK

INTERFACE TRUNK PAIRS.

● CODE NO:

221A

Figure 3-20. CO Trunk Labels for 110-Type Terminal Blocks

Auxiliary Labels (Yellow)

AUXILIARY PORT AND CIRCUIT LABELS

The labels shown in Figure 3-21 identify auxiliary port and circuit

appearances at the cross-connect field. The labels must be filled in manually.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

YELLOW

● USAGE:

●

IDENTIFIES 3-PAIR AUXILIARY

CIRCUITS 1 THROUGH 8

CODE NO:

222A

YELLOW

● USAGE:

IDENTIFIES SSI PORTS 1 THROUGH 6

FORM AN AP.

● CODE NO:

222A

Figure 3-21. Auxiliary Port and Circuit Appearance Labels for 110-

Type Terminal Blocks

AUXILIARY CIRCUIT AND CONTROL CARRIER OUTPUTS (AUXILIARY)

LABELS

The labels shown in Figures 3-22 and 3-23 identify auxiliary circuit

appearances and the control carrier AUXILIARY connector outputs for

System 75 and 75 XE, respectively. The top half of the labels identify

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Equipment Room Hardware And Cabling Installation auxiliary circuit appearances and must be filled in manually. The bottom half of the labels identify the control carrier AUXILIARY connector outputs.

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY) AND

AUXILIARY CIRCUITS

● CODE NO:

222A

Figure 3-22. Auxiliary Circuit and Control Carrier Outputs

(AUXILIARY) Labels for 110-Type Terminal

Blocks—System 75

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Equipment Room Hardware And Cabling Installation

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY) AND

AUXILIARY CIRCUITS

● CODE NO:

222A

Figure 3-23. Auxiliary Circuit and Control Carrier Outputs

(AUXILIARY) Labels for 110-Type Terminal

Blocks—System 75 XE

Z1A EMERGENCY TRANSFER UNIT AND CONTROL CARRIER OUTPUTS

(AUXILIARY) LABELS

The labels shown in Figures 3-24 and 3-25 identify the leads and

connection point for –48 volt dc power to the Z1A emergency transfer unit and the control carrier AUXILIARY connector outputs for System 75 and 75 XE, respectively. The top half of the labels identify the Z1A emergency transfer unit and the bottom half of the labels identify the control carrier AUXILIARY connector outputs. The control carrier

AUXILIARY connector outputs are the same as described for the auxiliary circuit and control carrier outputs labels.

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Equipment Room Hardware And Cabling Installation

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY) AND

Z1A EMERGENCY TRANSFER UNIT CIRCUITS

● CODE NO:

222A

Figure 3-24. Z1A Emergency Transfer Unit and Control Carrier Outputs (AUXILIARY) Label for 110-Type Terminal

Blocks—System 75

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CHAPTER 3. EQUIPMENT ROOM DESIGN

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY) AND

Z1A EMERGENCY TRANSFER UNIT CIRCUITS

● CODE NO:

222A

Figure 3-25. Z1A Emergency Transfer Unit and Control Carrier Outputs (AUXILIARY) Label for 110-Type Terminal

Blocks—System 75 XE

574-5 POWER TRANSFER UNIT AND CONTROL CARRIER OUTPUTS

(AUXILIARY) LABELS

The labels shown in Figures 3-26 and 3-27 identify the leads to the

574-5 power transfer unit and the control carrier AUXILIARY connector outputs for System 75 and 75 XE, respectively. The top half of the labels identify the 574-5 power transfer unit and the bottom half of the labels identify the control carrier AUXILIARY connector outputs. The control carrier AUXILIARY connector outputs are the same as described for the auxiliary circuit and control carrier outputs labels.

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Equipment Room Hardware And Cabling Installation

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY)

AND 574-5 EMERGENCY TRANSFER UNIT CIRCUITS

●

CODE NO:

222A

Figure 3-26. 574-5 Power Transfer Unit and Control Carrier Outputs

(AUXILIARY) Labels for 110-Type Terminal

Block—System 75

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CHAPTER 3. EQUIPMENT ROOM DESIGN

● USAGE:

IDENTIFIES CONTROL CARRIER OUTPUTS (AUXILIARY)

AND 574-5 EMERGENCY TRANSFER UNIT CIRCUITS

●

CODE NO:

222A

Figure 3-27. 574-5 Power Transfer Unit and Control Carrier Outputs

(AUXILIARY) Labels for 110-Type Terminal

Block—System 75 XE

Z1A EMERGENCY TRANSFER UNIT LABELS

The label shown in Figure 3-28 identifies the emergency transfer leads

and the -48 volt dc power connection for the Z1A emergency transfer unit.

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Equipment Room Hardware And Cabling Installation

● CODE NO:

222A

Figure 3-28. Z1A Emergency Transfer Unit Label

574-5 POWER TRANSFER UNIT LABEL

Both sections of the label shown in Figure 3-29 identify leads to the

574-5 power transfer unit.

● CODE:

222A

Figure 3-29. 574-5 Power Transfer Unit Label

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CHAPTER 3. EQUIPMENT ROOM DESIGN

BLANK AUXILIARY LABEL

The blank label shown in Figure 3-30 identifies auxiliary equipment and must be filled in manually.

●

USAGE:

CUSTOM IDENTIFICATION OF AUXILIARY EQUIPMENT

● CODE NO:

222A

Figure 3-30. Blank Auxiliary Labels

Label Code 222A—Yellow Labels (comcode 103 970 026)

Lable code 222A contains the following labels:

●

(4) AP SSI port labels (Figure 3-20)

●

(4) 3-pair auxiliary circuit labels (Figure 3-21)

●

(2) unnumbered auxiliary circuit and control carrier AUXILIARY

connector labels (Figures 3-22 or 3-23)

● (2) Z1A emergency transfer unit and control carrier AUXILIARY

connector labels (Figures 3-24 or 3-25)

● (2) 574-5 power transfer unit and control carrier AUXILIARY

connector labels (Figures 3-26 or 3-27)

●

(2) Z1A emergency transfer unit labels (Figure 3-28)

●

(2) 574-5 power transfer unit labels (Figure 3-29)

● (6) blank labels (Figure 3-30).

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Equipment Room Hardware And Cabling Installation

Station Labels (White and Blue)

3-PAIR WHITE STATION LABELS

The white labels shown in Figure 3-31 identify 3-pair station appearances

at the cross-connect field that connect to a satellite location. The top labels are grouped and numbered in sequence, A 1 to A 160 through F

1 to F 160 to correspond to the satellite locations. The bottom labels must be filled in manually. These labels are installed starting with the first terminal block in the white field.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

A 1

A 9

WHITE

A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8

A 9 A 10 A 11 A 12 A 13 A 14 A 15 A 16

● USAGE:

IDENTIFIES 3-PAIR CIRCUIT APPEARANCES

THAT CONNECT TO A SATELLITE LOCATION.

● CODE NO:

223A

WHITE

● USAGE:

CUSTOM IDENTIFICATION OF 3-PAIR CIRCUIT

APPEARANCES THAT CONNECT TO A

SATELLITE LOCATION.

● CODE NO:

223A

Figure 3-31. 3-Pair White Station Wiring (Equipment Room) Labels

3-46

Equipment Room Hardware And Cabling Installation

Label Code 223A—White Labels (comcode 103 970 034)

Label code 223A contains the following labels:

● (60) white labels that identify 3-pair circuits from the equipment

room to the satellite closet (Figure 3-31). Each label identifies 16

three-pair station circuits. There are labels for satellite closets numbered A through F, and each satellite closet has station circuits numbered 1 through 160.

●

(20) unnumbered white labels (Figure 3-31) that identify 3-pair

station circuits from the satellite closet. Each label identifies twelve 3-pair station circuits.

3-PAIR BLUE STATION LABELS

The labels shown in Figure 3-32 identify 3-pair blue station appearances

at the cross-connect field. The top labels are numbered and should be installed in sequence (1 to 560) starting with the first terminal block in the blue field. The bottom label must be filled in manually.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

BLUE

1 2 3 4 5 6 7 8

9 1 0 1 1 1 2 1 3 1 4 1 5 1 6

● USAGE:

IDENTIFIES 3-PAIR STATION APPEARANCES THAT

CONNECT TO A 356A ADAPTER. LABELS ARE

NUMBERED IN SEQUENCE FROM 1 TO 560.

● CODE NO:

224A

BLUE

● USAGE:

CUSTOMER IDENTIFICATION OF 3-PAIR STATION

APPEARANCES THAT CONNECT TO A 356A

ADAPTER.

● CODE NO:

224A

Figure 3-32. 3-Pair Blue Station Wiring (Equipment Room) Labels

3-48

Equipment Room Hardware And Cabling Installation

Label Code 224A—Blue Labels (comcode 103 970 042)

Label code 224A contains the following labels:

●

(35) blue labels (Figure 3-32) that identify 3-pair station circuits

from the equipment room. Each label identifies sixteen 3-pair station circuits. The labels are numbered sequentially from 1 to

560.

●

(40) blue labels (Figure 3-33) that identify 4-pair station circuits

from the equipment room. Each label identifies twelve 4-pair station circuits. The labels are numbered sequentially from 1 to

480.

●

(102) blue labels (Figure 3-33) that identify 4-pair station circuits

from the satellite closet. Each label identifies twelve 4-pair station circuits. There are labels for satellite closets numbered A through

F, and each satellite closet has station circuits numbered 1 through 204.

●

Unnumbered blue labels (Figure 3-32) that identify 3-Pair station

circuits from the equipment room. Each label identifies sixteen

3-pair station circuits.

●

Unnumbered blue labels (Figure 3-33) that identify 4-pair station

circuits from the equipment room. Each label identifies twelve

4-pair station circuits.

●

(28) unnumbered blue labels (Figure 3-34) that identify 4-pair

station circuits from the satellite closet. Each label identifies twelve 4-pair station circuits.

4-PAIR BLUE STATION LABELS

The labels shown in Figure 3-33 identify 4-pair station appearances at

the cross-connect field. The top labels are numbered and installed in sequence (1 to 480) starting with the first terminal block in the blue field.

The bottom label must be filled in manually. The labels shown in Figure

3-34 identify 4-pair station circuits from the satellite closet. The top

labels are grouped and numbered in sequence A 1 to A 204 through F

1 to F 204 to correspond to the satellite locations and information outlets.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

BLUE

● USAGE:

IDENTIFIES 4-PAIR STATION APPEARANCES.

LABELS ARE NUMBERED IN SEQUENCE FROM

1 TO 480.

● CODE NO:

224A

● USAGE:

CUSTOMER IDENTIFICATION OF 4-PAIR STATION

APPEARANCES.

● CODE NO:

224A

Figure 3-33. 4-Pair Blue Station Wiring (Equipment Room) Labels

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Equipment Room Hardware And Cabling Installation

BLUE

● USAGE:

IDENTIFIES 4-PAIR STATION APPEARANCES

AT THE SATELLITE LOCATION.

● CODE NO:

224A

● USAGE:

CUSTOMER IDENTIFICATION OF 4-PAIR STATION

APPEARANCES AT THE SATELLITE LOCATION.

● CODE NO:

224A

Figure 3-34. 4-Pair Blue Station Wiring (Satellite Closet) Labels

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Port Labels (Purple)

PORT LABELS

The labels shown in Figure 3-35 identify the equipped carrier slots (see

Note) in the switch cabinet. These labels are grouped together (by carriers) starting with Carrier A. These labels are used for the trunk/auxiliary field, and the distribution field. They are installed starting with the first terminal block in either field. The top label is grouped and numbered in sequence 1A1 to 1A10 and 1B1 to 1B20 through 1E1 to

1E20 to correspond to the cabinet, carrier, and slot of the port circuit pack. The bottom label must be filled in manually. It is used to label the

MET line circuit pack and the 16-port analog line circuit pack. An example of how to fill out the label for the MET line circuit pack is shown

in Figure 3-36. An example of how to fill out the label for the 16-port analog line circuit pack is shown in Figure 3-37. If WP-90929, List 1 or

3 concentrator cables are used to connect trunk or tie trunk circuits to

the switch, then use the labels shown in Figure 3-38 and 3-39 for these

circuits. Figure 3-40 shows an example of how to fill out a dual-purpose

emergency transfer station label.

Note: Equipped carrier slots are identified on the Customer

Service Order (CSO).

3-52

PURPLE

Equipment Room Hardware And Cabling Installation

PURPLE

● USAGE:

IDENTIFIES CABINET, CARRIER, PORT CIRCUIT SLOT

NUMBERS, AND EIGHT PORT CIRCUITS.

● CODE NO:

225A

PURPLE

● USAGE:

CUSTOM IDENTIFICATION OF CABINET, CARRIER, PORT CIRCUIT

SLOT NUMBERS, AND EIGHT PORT CIRCUITS.

●

CODE NO:

225A

Figure 3-35. Port Labels

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CHAPTER 3. EQUIPMENT ROOM DESIGN

PURPLE PURPLE

Figure 3-36. Example of Port Label for MET Line Circuit Pack

PURPLE

Figure 3-37. Example of Port Label for 16-Port Analog Line Circuit

Pack

3-54

Equipment Room Hardware And Cabling Installation

SYSTEM TRUNK AND TIE TRUNK PORT LABELS

WP-90929, List 1 or 3 concentrator cables can be used between the switch cabinet and the 110-type terminal blocks. The label shown in

Figure 3-38 identifies 3-pair trunk circuits from the switch cabinet. The

label shown in Figure 3-39 identifies 3-pair tie trunk circuits from the

switch cabinet.

●

USAGE:

IDENTIFIES CO TRUNK CIRCUIT PORTS WHEN

WP-90929, LIST 1 CONCENTRATOR CABLE IS USED

CODE NO:

225A

Figure 3-38. Switch Trunk Port Circuit Labels

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CHAPTER 3. EQUIPMENT ROOM DESIGN

PURPLE

●

USAGE:

IDENTIFIES TIE TRUNK CIRCUIT PORTS WHEN

WP-90929, LIST 3 CONCENTRATOR CABLE IS USED

CODE NO:

225A

Figure 3-39. Switch Tie Trunk Port Circuit Labels

DUAL-PURPOSE EMERGENCY TRANSFER STATION LABELS

The label shown in Figure 3-40 identifies the telephone connections at

the cross-connect field for both normal use and emergency transfer stations.

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Equipment Room Hardware And Cabling Installation

PURPLE

● CODE NO:

225A

Figure 3-40. Dual-Purpose Emergency Transfer Station Labels

Label Code 225A—Purple Labels (comcode 103 970 059)

Label code number 225A contains the following port labels:

●

(45) purple labels (Figure 3-35) that identify 3-pair port circuits

from the switch. The labels are numbered for the carriers at the switch, A through E, and each carrier has slots numbered 1 to 20, except carrier A which is only 1 to 10. Each label identifies 16

3-pair circuits.

●

(10) unnumbered purple labels (Figure 3-35) that identify 3-pair

port circuits from the switch. Each label identifies 16 3-pair circuits.

● (3) purple labels that identify 3-pair system trunk port circuits from the switch when WP-90929, List 1 (Figure 3-40) concentrator cables are used.

● (3) purple labels that identify 3-pair system tie trunk port circuits

from the switch when WP-90929, List 3 (Figure 3-39) concentrator

cables are used.

3-57

CHAPTER 3. EQUIPMENT ROOM DESIGN

●

(5) purple labels to identify connections to dual-purpose

emergency transfer stations (Figure 3-40).

Labeling 66-Type Connecting Blocks

The cross-connect field is color-coded to identify system wiring as follows:

● Green—Leads to CO

● Purple—Leads to switch ports

● Yellow—Leads to auxiliary equipment and miscellaneous switch leads

● Blue—Leads to information outlets

● White—Leads from the cross-connect field to the satellite locations (3-pair).

A permanent felt-tipped pen can be used to write the lead designations

on the 66-type connecting blocks (Figure 3-41). Table 3-G shows the

lead designations for the switch port appearances at the cross-connect

field, and Table 3-H shows the lead designations for the auxiliary

circuits. Any time these leads are cross-connected to another connecting block they should also be labeled at that block.

3-58

Equipment Room Hardware And Cabling Installation

LEFT SIDE

OF 66-TYPE

CONNECTING

BLOCK

Figure 3-41. Labeling 66-Type Connecting Blocks

3-59

CHAPTER 3. EQUIPMENT ROOM DESIGN

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Equipment Room Hardware And Cabling Installation

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Table 3-H. Auxiliary Lead Appearances at 66-Type Cross-Connect

Field

66-Type

Conn

Block

Term

System

75 Auxiliary

Connector

Outputs

System

75 XE Auxiliary

Connector

Outputs

Z1A

Emerg

Xfr Unit

Outputs

574-5

Power

Xfr Unit

Outputs

Not Connected

GND

-48

GND

-48

GND

-48

GND

-48

GND

-48

GND

-48

GND

-48

Emergency

Transfer

Relay

Power

Not Connected

GND

-48

GND

-48

GND

-48 Emergency

GND Transfer

-48 Relay

GND

Power

-48

GND

-48

GND

-48

3-62

Equipment Room Hardware And Cabling Installation

Table 3-H. Auxiliary Lead Appearances at 66-Type Cross-Connect

Field (Contd)

66-Type

Conn

Block

Term

System

75 Auxiliary

Connector

Outputs

System

75 XE Auxiliary

Connector

Outputs

Z1A

Emerg

574-5

Power

Xfr Unit Xfr Unit

Outputs Outputs

Not Connected

GND

-48

GND

-48

ACC Power

Not Connected

INADS

Not Connected

Ext Alarm A

Ext Alarm B

Not Connected

INADS

PWR

COM1

N01

NC2

NC1

COM2

N02

COM3

NC3

GRD

-48V

Installing Sneak Fuse Panels

The sneak fuse panel (Figure 2-18) must be installed as near as

possible to the network interface. To install the sneak fuse panel, proceed as follows:

Hold the panel against the mounting surface and mark the upper right and lower left mounting screw locations.

Drill pilot holes at the marked locations, and partially install the 3/4 inch No. 12 screws.

Slide the sneak fuse panel onto the mounting screws and tighten the screws.

Repeat the procedure for each sneak fuse panel.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Cable Installation

Labels

The purple port Iabel shown in Figure 3-42 installed on both ends of the 25-pair cables that connect to the trunk/auxiliary field and/or the distribution field. The blue/yellow building and floor labels are for cables that connect from the equipment room to a site/satellite location on another floor or in another building. The yellow label is for auxiliary circuits that connect to the trunk/auxiliary field or for SSI circuits that connect to an AP.

The blue/yellow label is for 25-pair cables that connect to site/satellite closets.

LABEL NAME

PORT CABLE

RANGE

1A1-1A10, 1B1-1B20,

1C1-1C20, 1D1-1D20,

1E1-1E20

SAMPLE LABEL

PURPLE

BUILDING FIELD IDENTIFIED

BLUE/YELLOW

FLOOR

AUXILIARY

CABLE

SITE OR

SATELLITE

FIELD IDENTIFIED

A-F AND/OR

FIELD IDENTIFIED

YELLOW

BLUE/YELLOW

Figure 3-42. Equipment Room Cabling Labels

3-64

Equipment Room Hardware And Cabling Installation

CABLE/CONNECTOR/BUILDING LABEL ORDERING INFORMATION

Description

201A Labels

Qty. Per. Code

34 Sheets

Comcode

103 969 994

Figure 3-43 shows the proper way to install a label on a 25-pair cable connector (see Note).

Note: The label should be installed near the rear of the connector as shown in Figure 3-43 so it will not be obscured by the switch cabinet connector retainers. Also, it can be installed on the skin of the cable near the connector.

1 A 2

PURPLE

Figure 3-43. Installing Self-Stick Label on 25-Pair Cable Connector

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Routing Cable Guidelines

General

The following guidelines should be followed when installing the equipment room cabling. FoIlowing these guidelines will maximize use of the cable slack managers and make future cabling additions and changes easier.

Figures 3-44 and 3-45 show typical cable routing from the switch

cabinet to the top and bottom of the cross-connect field, respectively.

BUILDING

CABLES

POWER

CORD

➀

➁

CABLES RUN FROM SWITCH CABINET TO TRUNK/AUXILIARY

FIELD.

CABLES RUN FROM SWITCH CABINET TO STATION DISTRIBUTION

FIELD.

Figure 3-44. Cable Routing From Switch Cabinet to Cross-Connect

Field (Using Top Terminal Blocks)

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Equipment Room Hardware And Cabling Installation

TRUNK/AUXILIARY

CROSSS-CONNECT FIELD

STATION DISTRIBUTION

CABLE SLACK

MANAGER

NO. 1

CABLE SLACK

MANAGER

NO. 2

CABLE SLACK

MANAGER

NO. 3

BUILDING

CABLES

POWER

CORD

SYSTEM

CABINET

(FRONT)

➀

CABLES RUN FROM SWITCH CABINET TO

TRUNK/AUXILIARY FIELD.

➁

CABLES RUN FROM SWITCH CABINET TO

STATION DISTRIBUTION FIELD.

Figure 3-45. Cable Routing From Switch Cabinet to Cross-Connect

Field (Using Bottom Terminal Blocks)

Routing Cables Using 110-Type Terminal Blocks

Figures 3-46 and 3-47 show the cable routing pattern through the cable

slack manager for a single cabinet installation using connectorized

110-type terminal blocks with the connectors located at the top and bottom of the terminal blocks, respectively. Cables are routed through the cable slack manager in either the cabinet or wall troughs. When needed, the two center troughs can be used.

Port cables are routed through the cabinet trough for parallel runs.

Station cables should use the wall trough. After the cabinet and wall troughs are filled, use the center trough.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

CABLE CLAMP

CABLE SLACK

MANAGER

SWITCH

CABINET

CABINET TROUGH

FOR PORT CABLES

SPARE CENTER

TROUGHS

Figure 3-46. Cable Routing Through Cable Slack Manager—Single-

Cabinet Installation (Using Connectorized Top

Terminal Blocks)

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Equipment Room Hardware And Cabling Installation

CABLE CLAMP

CABLE SLACK

MANAGER

SWITCH

CABINET

CABINET TROUGH

FOR PORT CABLES

SPARE CENTER

TROUGHS

Figure 3-47. Cable Routing Through Cable Slack Manager—Single-

Cabinet Installation (Using Connectorized Bottom Terminal Blocks)

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CHAPTER 3. EQUIPMENT ROOM DESIGN

Routing Cables Using 66-Type Connecting Blocks

Figures 3-48 and 3-49 show the cable routing pattern through the cable

slack manager for a single cabinet installation with the cables routed from the top and bottom of the 66-type connecting blocks, respectively.

Cables are routed through the cable slack manager in either the cabinet or wall troughs. When needed, the two center troughs can be used.

Port cables are routed through the cabinet trough for parallel runs.

Station cables should use the wall trough. After the cabinet and wall troughs are filled, use the center trough.

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Equipment Room Hardware And Cabling Installation

CABLE CLAMP

CABLE SLACK

MANAGER

SWITCH

CABINET

CABINET TROUGH

FOR PORT CABLES

SPARE CENTER

TROUGHS

Figure 3-48. Cable Routing Through Cable Slack Manager—Single-

Cabinet Installation (Using 66-Type Connecting Blocks

With Cables Routed From Top of Cross-Connect Field)

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CHAPTER 3. EQUIPMENT ROOM DESIGN

CABLE CLAMP

CABLE SLACK

MANAGER

SWITCH

CABINET

CABINET TROUGH

FOR PORT CABLES

SPARE CENTER

TROUGHS

Figure 3-49. Cable Routing Through Cable Slack Manager—Single-

Cabinet Installation (Using 66-Type Connecting Blocks

With Cables Routed From Bottom of Cross-Connect

Field)

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Equipment Room Hardware And Cabling Installation

Routing Cables From Cabinet to Cross-Connect Field

The following guidelines should be followed when routing cables from the cabinet to the cross-connect field.

● When cable routing is to the top/bottom of the cross-connect field, each port cable is connected at the cabinet and then routed along the front trough of the cable slack manager to the connecting/terminal block where the cable is to be terminated.

● Enough slack must be left at the cabinet end of the cable to allow

for proper dressing of the cables (Figure 3-50).

● Route the cable from the cabinet to the wall. Place the cable beside one of the rows of columns in the cable slack manager

(see Note).

Note: Retainers mounted on the columns keep the cable from protruding above the top of the base of the cable slack manager.

● Determine the length of the cable required to reach from the cable slack manager to the assigned connecting/terminal block.

● The cable must be supported on the wall using D rings.

● Cable slack is stored by coiling the cable around the columns in the cable slack manager. The first run should always go across the full length of the five columns in the cable slack manager.

● Connect the cable to the assigned connecting/terminal block.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

CABLE

CLAMP

CABLE TIES

(OPTIONAL)

CABLE

CLAMP

POWER

CORD

3-74

Figure 3-50. Typical Port Cable Installation at Switch Cabinet

Equipment Room Hardware And Cabling Installation

Installing Control Carrier Outputs Cable

The control carrier AUXILIARY connector outputs include the following:

● Alarm monitoring for the AP and auxiliary cabinet

● (7) dc power (-48 volts) sources for emergency transfer units

● (3) dc power (-48 volts) sources for remotely powering two attendant consoles and one executive voice terminal adjunct (not provided on System 75 XE)

●

The INADS trunk connection location.

● For the System 75 XE, access to a relay contact is available to actuate a light, bell, or similar type customer-provided alarm device. The relay can be administered to make contact when a major, minor or warning alarm condition occurs in the switch. The circuitry required for this feature must be provided by the customer. The device connected to the alarm leads must not exceed a rating of more than 100 volts at ¾ amps.

A 25-pair cable connects the control carrier AUXILIARY connector

(Figures 3-51 and 3-52) to a 66-type connecting block/110-type terminal

block in the yellow field of the trunk/auxiliary field.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

CONTROL CARRIER (REAR VIEW)

Figure 3-51. Control Carrier Outputs (AUXILIARY

Connector)—System 75

CONTROL CARRIER (REAR VIEW)

Figure 3-52. Control Carrier Outputs (AUXILIARY

Connector)—System 75 XE

3-76

Equipment Room Hardware And Cabling Installation

Labeling Control Carrier Cable (Used With 110-Type Hardware)

Place the appropriate AUXILIARY connector label (Figure 3-30) on the

assigned 110-type terminal block row. On the control carrier cable,

place a yellow auxiliary label (Figures 3-42 and 3-43) on the connectors

at each end of the cable. Write the letters AUX on each label.

Labeling Control Carrier Cable (Used With 66-Type Hardware)

Write the lead designations for the AUXILIARY connector (Table 3-G) on

the 66-type connecting block. If cable labels are to be used, place a

yellow auxiliary label (Figures 3-42 and 3-43) on the connectors at each

end of the cable. Write the AUX on each label. If cable labels are not available, use a magic marker to write AUX on the connectors at each end of the cable.

Connecting Control Carrier Outputs Cable

Plug the connector cable in the AUXILIARY connector on the rear of the control carrier. Route the connector cable through the cable slack manager to the assigned 66-type connecting block/110-type terminal block in the yellow field of the trunk/auxiliary field.

The output wiring connections for alarm monitoring, emergency power failure, accessory power, and the INADS trunk interface is contained in

Chapter 4 of this guide under the heading Miscellaneous Wiring

Installation.

Installing Trunk Cables Between Network Interface, Sneak Fuse Panel, and

Switch Cabinet

The 1-pair CO trunks are installed by the local telephone company in the green field. Up to 24 pairs may be terminated on each 66-type connecting block or on each row of the 110-type terminal block. Tie trunks also appear in the green field with up to eight 3-pair trunks terminated on each 66-type connecting block or on each row of the

110-type terminal block.

Selecting Concentrator Cables For Use With 110-Type Hardware

WP-90929, List 1 and 3 concentrator cables can be used to connect the switch cabinet to the 110-type terminal blocks in the purple field. The

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CHAPTER 3. EQUIPMENT ROOM DESIGN

1-pair patch cords/jumper wires are then run from the purple terminal block rows to the green terminal block rows in order to establish the

correct 3-pair modularity. Table 3-H shows switch port appearances at

the cross-connect field. Figures 3-53, 3-54, and 3-55 show the carrier

connectors on the rear of the switch that connect to the purple field.

CABINET

FANS

CONTROL CARRIER A

PORT CARRIER B

REAR VIEW

A10 A01

B20 B11 B10

Figure 3-53. System 75, Slot Addresses for 2-Carrier Cabinet

B01

3-78

Equipment Room Hardware And Cabling Installation

3-79

3-80

Equipment Room Hardware And Cabling Installation

Selecting Concentrator Cables For Use With 66-Type Hardware

WP-90929, List 2 and 4 concentrator cables can be used to connect the switch cabinet to the 66-type connecting blocks in the purple field.

Jumper wires are then run from the connecting blocks in the purple field to the connecting blocks in the green field to establish the correct 3-pair

modularity for the 1- and 3-pair trunks. Table 3-H shows switch port

appearances at the cross-connect field. Figures 3-53, 3-54, and 3-55

show the carrier connectors on the rear of the switch that connect to the purple field.

Connecting Trunk Pairs to the Switch Cabinet Using Concentrator Cables

Figure 3-56 shows trunk pairs connected to the switch cabinet with

concentrator cables. To install the cables, proceed as follows:

Connect B25A connector cables between the network interface and sneak fuse panels.

Connect A25D connector cables from the sneak fuse panels to the

110-type terminal block/157B connecting block connectors in the green field.

For 110-type hardware only, connect patch cords/jumper wires from the terminal block in the green field to the associated terminal block in the purple field.

For 66-type Hardware only, install bridging clips on the 66-type connecting blocks, as required (see Note).

Note: The left half of the 66-type connecting block is designated as part of the green field and the right half is designated as part of the purple field.

Connect the single-fingered end of the concentrator cables to the

110-type terminal block/157B connecting block connectors associated with the purple row in Step 3/4.

At the rear of the switch cabinet, connect the other end (2/3-fingered end) of the concentrator cables to the appropriate carrier slots

(Figures 3-53, 3-54, or 3-55). Equipped carrier slots are identified on

the CSO. Mark the nomenclature strips above the carriers to identify the equipped slots.

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CHAPTER 3. EQUIPMENT ROOM DESIGN

CONCENTRATOR

CABLE

WP90929,

LIST 1

USING

11O-TYPE

HARDWARE

CONCENTRATOR

CABLE WP90929,

LIST 2

USING

66-TYPE

HARDWARE

CENTRAL

OFFICE

TRUNKS

B25A

CABLE

B25A

CABLE

157B

CONNECTING

BLOCKS

CONCENTRATOR

CABLE, WP90929,

LIST 4

Figure 3-56. Connecting Trunk Pairs Used for 1-Pair Trunk Circuits;

DID, Loop Start, Ground Start Using Concentrator

Cables

3-82

Equipment Room Hardware And Cabling Installation

Label connectors on each end of the cables that connect to the switch cabinet.

Dress cables down the sides of the switch cabinet and store the excess cable slack in the cable slack manager as described previously.

Connecting Trunk Pairs to the Switch Cabinet Using Jumper Wires To

Establish 3-Pair Modularity

Figures 3-57 and 3-58 show trunk pairs connected to the switch cabinet

with jumper wires to establish 3-pair modularity. To connect the trunk pairs to the purple field, proceed as follows:

Connect B25A connector cables between the network interface and

the sneak fuse panels (Figure 3-56).

Connect A25D/B25A connector cables from the sneak fuse panels to the 110-type terminal block/66-type connecting block connectors

in the green field (Figure 3-56).

Connect 1-pair patch cords/jumper wires from each 110-type terminal block row/66-type connecting block in the green field to the 110-type terminal block rows/66-type connecting blocks in the

purple field as shown in Figure 3-57 for 1-pair CO trunks or in

Figure 3-58 for 3-pair tie trunks.

3-83

CHAPTER 3. EQUIPMENT ROOM DESIGN

1 2 3 4 5 6 7 8

110-TYPE TERMINAL BLOCK

ROW/66-TYPE CONNECTING

BLOCK IN GREEN FIELD

PAIRS

9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

1 PAIR

JUMPERS

1 4 7 10 13 16 19 22

PAIRS

1 4 7 10 13 16 19 22

PAIRS

1 4 7 10 13 16 19 22

PAIRS

11O-TYPE TERMINAL BLOCK

ROW/66-TYPE CONNECTING

BLOCK IN PURPLE FIELD

Figure 3-57. Example of Establishing 3-Pair Modularity for Trunk

Pairs Used for 1-Pair Trunk Circuits; DID, Loop Start,

Ground Start

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Equipment Room Hardware And Cabling Installation

11O-TYPE TERMINAL BLOCK

ROW/66-TYPE CONNECTING

BLOCK IN GREEN FIELD

PAIRS

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

1 PAIR

JUMPERS

1 2 3 4 5 6 7 8 9 10 11 12

PAIRS

11O-TYPE TERMINAL BLOCK

ROW/66-TYPE CONNECTING

BLOCK IN PURPLE FIELD

1 2 3 4 5 6 7 8 9 10 11 12

PAIRS

Figure 3-58. Example of Establishing 3-Pair Modularity for Trunk

Pairs Used for 3-Pair Tie Trunks

3-85

CHAPTER 3. EQUIPMENT ROOM DESIGN

Installing Coupled Bonding Conductor (CBC) Grounding

A CBC must be tie-wrapped to all trunk cables. The CBC connects the cabinet single-point ground block to the approved ground located nearest the telephone company owned protector block at the building

entrance facility (Figure 3-59).

Note: The CBC is a conductor that is connected to ground and run adjacent to the pairs in an inside wiring cable. The mutual coupling between the bonding conductor and the cable pairs reduces potential differences in terminating equipment. The conductor consists of a No. 10 AWG wire that is tie-wrapped to the inside wiring cable.

APPROVED GROUNDS

An approved ground is an acceptable medium for grounding the building entrance protector, entrance cable shield, or single-point ground of electronic PBX equipment. If more than one type of approved ground is available on the premises, the grounds must be bonded together as required in Section 250-81 of the National Electrical Code.

Metal Frame of the Building — the metal frame of the building where it is effectively grounded by one of the following grounds: acceptable metallic water pipe, concrete encased ground, or a ground ring.

Acceptable Water Pipe — a metal underground water pipe, at least 1/2 inch in diameter, in direct contact with the earth for at least 10 feet. The pipe must be electrically continuous (or made electrically continuous by bonding around insulated joints, plastic pipe, or plastic water meters) to the point where the protector ground wire is connected. A metallic underground water pipe must be supplemented by the metal frame of the building, a concrete encased ground, or a ground ring. If these grounds are not available, the water pipe ground can be supplemented by one of the following types of grounds:

●

Metal underground gas piping system—an electrically continuous metal underground gas piping system that is uninterrupted with insulating sections or joints and without an outer nonconductive coating

●

Other local metal underground systems or structures—local underground structures such as tanks and piping systems

3-86

Equipment Room Hardware And Cabling Installation

●

Rod and pipe electrodes—a 5/8 inch (solid rod) or 3/4 inch

(conduit or pipe) electrode driven to a minimum depth of 8 feet

● Plate electrodes—expose a minimum of 2 square feet of metallic surface to the exterior soil.

Concrete Encased Ground — an electrode encased by at least 2 inches of concrete and located within and near the bottom of a concrete foundation or footing in direct contact with the earth. The electrode must be at least 20 feet of one or more steel reinforcing bars or rods 1/2 inch in diameter, or at least 20 feet of bare, solid copper, No. 4 AWG wire.

Ground Ring — a buried ground that encircles a building or structure at a depth of at least 2-1/2 feet below the earth’s surface. The ground ring must be at least 20 feet of No. 2 AWG, bare, copper wire.

APPROVED FLOOR GROUNDS

Approved floor grounds are those grounds on the floor of a high-rise building suitable for connection to the ground terminal in the riser closet and to the PBX equipment single-point ground terminal. Such grounds may be one of the following:

● Building steel

● The grounding conductor for the secondary side of the power transformer feeding the floor

● Metallic water pipes

● Power feed metallic conduit supplying panel boards on the floor

● A grounding point specifically provided in the building for the purpose.

3-87

CHAPTER 3. EQUIPMENT ROOM DESIGN

DANGER

If the approved ground or approved floor ground can only be accessed inside a dedicated power equipment room, then connections to this ground should be made by a licensed electrician

10 GAUGE CBC

TRUNK

CIRCUITS

SINGLE-POINT

GROUND BLOCK

CABLE

ENTRANCE

TERMINAL

APPROVED GROUND

LIGHTNING

SURGE

PROTECTOR

Figure 3-59. Installing the Coupled Bonding Conductor

3-88

Equipment Room Hardware And Cabling Installation

Installing Connector Cables Between Switch Cabinet and the Cross-Connect

Field

Before starting the following procedure, refer to the heading Routing

Cables From Cabinet to Cross-Connect Field in this chapter. Also, all

purple labels should have been previously installed as described in this

chapter under the heading Labeling the Cross-Connect Field.

Install "D" rings on the wall between the cable slack manager and the terminal/connecting blocks mounted on the cross-connect field.

Install a self-sticking port label on the back of each connector on

the connector cable (Figure 3-43).

Note: Labels should be positioned so they will not be obscured by the cabinet connector retainers.

At the rear of the cabinet, connect one end of the connector cable to the assigned connector.

Dress the cable down the back of the cabinet, and through the cable slack manager to the cross-connect field.

At the cross-connect field, connect the other end of the cable to the assigned terminal/connecting block connector.

Store the cable slack in the cable slack manager.

Repeat previous Steps 2 through 6 until all cables are installed.

Installing Connector Cables Between Auxiliary Cabinet and Cross-Connect

Field

Auxiliary equipment that connects to the cross-connect field can be mounted inside the auxiliary cabinet. The equipment connects to an

ED-1E1443-10 (Group 1) intraconnection panel mounted in the auxiliary cabinet. This intraconnection panel consists of a 110-type 100-pair wiring block mounted inside the cabinet. Auxiliary equipment is connected to the 110-type wiring block. The wiring block is prewired to four 25-pair female connectors mounted on the outside rear skin of the cabinet.

3-89