4730 Protected Entrance Terminals
Underwriters Laboratories (UL) Listed
Instructions
January 1997
34-7035-1394-4 Revision C
1
2
Contents:
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
13.0
14.0
15.0
16.0
17.0
18.0
19.0
20.0
General ........................................................................................................................4
Description ..................................................................................................................4
Accessories..................................................................................................................5
UL Listing ...................................................................................................................5
Tools and Material Requirements ...............................................................................5
Terminal Location .......................................................................................................5
Terminal Grounding ....................................................................................................6
Cable Preparation ........................................................................................................6
Splicing .......................................................................................................................8
Distribution Wire Installation .....................................................................................9
Protector Installation ...................................................................................................10
Multiple Pairs ..............................................................................................................10
Testing .........................................................................................................................11
Distribution Wire Removal .........................................................................................11
Pair Connector Removal .............................................................................................11
Expansion: Installation of the 4730-SK Kit (Option) .................................................12
Vertical Multiple Terminal Installation (Option) ........................................................13
4791 Metal Skirt (Option)...........................................................................................13
1/2 Ringer Installation (Option) ..................................................................................13
Jumpering Tool (Option) .............................................................................................14
3
1.0 General
1.01 The 3M brand 4730 Series Protected Entrance Terminals (PETs) provide termination of entrance cable and
a method of protecting distribution cable.
1.02 These units are available in 25-, 50- and 100-pair sizes and are Underwriters Laboratories (UL) listed.
The 4730-25 and -50 units may be expanded in the field to a maximum of 100 pair.
4730-25
4730-100
2.0 Description
2.01 The Terminal consists of the following:
a: Weather resistant metal housing.
b: A protector receptacle field that is terminated to either a 3M brand MS2™ DPM Module or 710 Connector
on one side and a 3M™ 4500 25-Pair Terminal Block with distribution terminal points on the other side.
d: Strain relief components for entrance cable.
e: An internal 3-port ground bar.
f: An internal insulated ground strap.
g: A mounting template and four (4) mounting screws.
h: Pair count log label.
To Distribution
Five-Pin
Receptacle
Field
2.02 Terminal Wiring Schematic:
26 AWG
Fuse Wire
Module
From C.O.
4500 25-pair
Connector Block
883706
2.03 Terminal Dimensions:
Model
Height
Width
Depth
4730-25/50/100
31"
(787 mm)
12-1/2"
(318 mm)
4-1/2"
(115 mm)
4
3.0 Accessories
3.01 Accessories for the 3M brand 4730 Protected Entrance Terminals include the following 3M products:
a: 4892 Gland Kit.
b: 4730-SK Termination Kit.
c: 4509-W Pair Cover (white).
d: 4509-R Priority Circuit Cap (red).
e: 4501-E Pair Connector (encapsulated).
f: 4791 Metal Skirt Kit.
g: 4889 Coupling Kit (for stacking two or more terminals).
h: 4727A Single-Pair Test Probe.
Note:
A temporary test probe can be made by terminating a pair of jumper wires in a 4501E Pair Connector
as outlined in sections 10.05 and 10.06. Strip opposite ends.
i: 4500-JT (used when terminating or removing distribution wire pairs and in removal of Pair Connectors).
4.0 UL Listing
4.01 To maintain UL listing, properly ground and use only five-pin protectors that are UL listed.
.
5.0 Tool and Material Requirements
5.01 Tool requirements for the 4730 Protected Entrance Terminal include the following:
a: MS2 Modular Splicing Rig.
b: MS2 4044 Splice Head Frame Adapter.
c: “B” versions require 710 Connector Splicing Rig.
d: Standard hand tools.
5.02 Materials:
a: Number 6 AWG grounding wire and clamp.
b: Scotch™ 88T Vinyl Tape or equivalent.
c: MS2 4005-DPM/FR Module or 4000-D/FR Module.
Note: Protected entrance terminals are to be installed in accordance with Article 800, Section C of the National
Electical Code (ANSI/NFPA 70).
6.0 Terminal Location
6.01 Locate terminal according to standard operating procedures. Consider the following points as much as
possible:
a: Locate the terminal on a firm mounting surface where it will be accessible to the technicians at all times;
can be reached without a ladder; and where it will not project in a hazardous manner.
Note: Avoid locations near flammable materials, ignitable gases, dust, moisture, temperature extremes, moving
machinery, electric light and power circuits, and electrical equipment.
b: Observe caution when exposing the terminal to chemicals in liquid or vapor form as they may damage the
plastic components.
.
5
6.02 Open terminal door by using a 7/16" terminal wrench or standard blade screwdriver. Remove the package
of installation hardware and mounting template.
6.03 Tape the mounting template in position and mark screw locations (4). Remove the mounting template.
6.04 Open the splice chamber by removing the two screws on the splice chamber cover. Reinsert screws in
tapped holes to avoid losing screws.
6.05 Pull the pre-terminated stub and insulated ground wire out of the splicing chamber.
6.06 Mount the terminal in position with the four mounting screws provided.
7.0 Terminal Grounding
7.01 Make a connection using a Number 6 AWG wire between the ground bar located on the inside of the unit
to a local ground per company standard.
Note: Failure to properly bond and ground the terminal per NEC or local equivalent codes may render
protection arrestors useless.
8.0 Cable Preparation
Note: To maximize the 4730 expansion capabilities, initial installation of 100-pair cable is suggested.
Unused cable pairs should be properly grounded per local practice to meet NEC requirements.
Note:
The maximum cable diameter for this terminal is 1-1/2" (38 mm). Minimum cable diameter allowed
in the area of PST application is 1" (25 mm). If the cable diameter is smaller than 1" (25 mm), build
up the diameter by applying Scotch 88T Vinyl Tape or equivalent.
8.01 Entrance cable can enter the PET (Protected Entrance Terminal)
from either the top or the bottom of the terminal. Remove the
knockout at the selected cable entry location.
8.02 Extend the entrance cable at least 30" (726 mm) past the cable
entry port.
8.03 For bottom entry, slide 3M brand 4631-S PST (Pull’N’Shrink
Tubing) over the cable sheath with the pull tab facing down.
Now slide the gland (without nut) over the cable sheath with the
fingers facing down. For top entry, the pull tab on the PST and
the fingers on the gland must be facing up when sliding over the
cable sheath.
8.04 Temporarily tape the PST and the gland to the wall, cable sheath
or other suitable surface to keep the PST and gland out of the
way.
6
923966
8.05
Lay the cable against the terminal and mark the sheath,
allowing for a minimum of 2" (51 mm) of cable sheath to
extend past the cable port.
Core Wrap
1/2" (13 mm)
2" (51 mm)
8.06
Remove the cable sheath leaving a minimum of 1/2" (13 mm)
of core wrap to protect the cable from the bonding connector.
Conductor length should be a minimum of 27" (686 mm).
Install a bonding connector per standard procedure.
8.07
Identify and tape the ends of the binder groups to keep the
conductors from unwinding during splicing operations.
8.08
Install the cable through the cable entry port into the splice
chamber of the terminal.
8.09
Slide the gland up the cable and insert it into the cable entry
port. While holding the gland in this position, slide the nut over
the cable beyond the bonding connector and install the gland
and nut.
8.10
Attach the insulated ground wire to the bonding connector per
standard procedure.
8.11
Slide the PST over the gland assembly and butt it up to the
terminal. Slowly unwind the loose core tail in a counter clockwise direction while edging the PST toward the terminal side as
the core is removed.
923966
923966
Note: The PST must be positioned a maximum of 3/8" (10 mm)
away from the terminal entry port. If positioned greater
than 3/8" away, remove the collapsed PST with a sharp
knife and then remove the cable and gland from the
terminal. Repeat steps 8.03, 8.08, 8.09, 8.10, 8.11 and 8.12
with a new PST.
883707
8.12
After positioning the PST as close as possible to the terminal,
continue core removal to collapse PST over the gland.
Complete core removal.
8.13 Permanently attach the cable to the wall approximately
18" (457 mm) away from the terminal.
7
883707
9.0 Splicing
9.01 Wire Termination using 3M brand MS2 Modules:
Note: All incoming cable pairs NOT terminated must be grounded.
a: Attach the 4041 Splice Head to the 4044 Frame Adapter.
Snap the adapter legs into the diamond shaped cut-outs in the
bracket.
Note: When using a 4000-D/FR Module, the gold adapter must be
placed in the splice head before splicing.
b: Place a 4005-DPM/FR module body/protector or 4000-D/FR
module base into the splice head. The cut corner should be on
the left-hand side and rear of the splicing head.
c: Select an entrance cable binder group and lay it into the
splice head. Check the conductor order with the check comb.
812176
d: When using a 4005-DPM/FR Module on the incoming cable
conductors, select the matching binder group from the preconnectorized stub and place into the splice head matching
the cut corners. If a 4000-D/FR Module is used, position a
4000-D/FR body into the splice head. Select the matching
binder group from the pre-connectorized stub and place into
the splice head matching the cut corners.
e: Crimp the module(s) using the 4030, 4031 or 4036 crimping
unit.
f: Install the 4077-C Sealant Box included with the terminal
when he incoming cable is spliced with a 4005-DPM/FR
Module. The 4077-B Sealant Box is required when using
4000-D/FR modules to splice the incoming cable.
Note: For health, safety and environmental information, see the
4077 Sealant Box label or the Material Safety Data Sheet.
9.02 Wire Termination using 710-type Connector:
a:
b:
c:
d:
Remove the door from the terminal.
Mount the splicing head 3" (76 mm) from the PET.
Terminate the wires according to Bell System practice.
Reinstall and secure the terminal door. The door must be
secured to meet UL requirements.
3" (76 mm)
9.03 Wire Termination using Scotchlok™ UP2 and UP3 Connectors:
Note: Scotchlok UP2 and UP3 Connectors may be used to replace
the module connectors on the pre-connectorized stub.
913964
a: Cut one pair out of the module/connector at a time.
b: When splicing with Scotchlok connectors, use the Scotchlok
E-9 series tools for proper crimping of connectors.
9.04 After termination is complete, neatly bundle the wire and
connectors and lay them in the splice chamber.
9.05 Close the chamber cover and secure with the screws removed in
section 6.04.
8
10.0 Distribution Wire Installation
Note: Pair Connector wire size range is 22-26 AWG with a maximum insulation O.D. of .066".
Connector will only accept one pair of conductors.
10.01 If installing 1/2 ringers, see section 19.0.
10.02 With a pointed tool, puncture the access port grommet and
insert the distribution pairs through the
grommet into the terminal.
10.03 Select the appropriate distribution Pair Connector. (If a pair is
currently terminated in this location, see section 12.0 Multiple
Pairs). While pinching the latch on the Pair Connector, swing
the cap towards the right.
Note: For health, safety and environmental information, see the
Material Safety Data Sheet for the 4500 Jumper Sealant.
10.04 For good housekeeping, dress the wire pair to the Pair
Connector leaving at least 3" of slack for tracing.
10.05 Trim the wires and insert them into the Pair Connector cap
wire ports; Tip (A) to the top and Ring (B) to the bottom.
Note: Be sure that the wires are inserted fully into the Pair
Connector cap and are clear of the latch prior to
termination.
10.06 Hold the wire pair in place while firmly pressing the Pair
Connector cap towards the Terminal Block with the thumb
until the cap is latched to the Pair Connector body.
Note:
See section 20.0 for use of the Jumpering tool.
10.07 Place wire pair through the jumper run guides on the bottom
side of the Terminal Block.
9
Each Pair
10.08 If any special circuits require identification, a 4509-R Priority
Cap should be installed at this time.
a:
Using the forefinger and thumb, pull white pair cover
straight out from the Pair Connector cap and remove.
b: Place the Priority Circuit Cap on top of the Pair Connector
cap. Using your thumb, firmly press the cap onto the Pair
Connector cap.
11.0 Protector Installation
11.01 Fully insert an appropriate UL Listed protector into a protector
receptacle. Refer to section 4.0.
Important:
All protectors must be fully inserted during testing.
Standard protector jack field pin configurations are used
with the central grounding pin serving to polarize the
module. A pair of long pins on each module connect TIP
and RING to the entrance cable side while shorter pins
connect to the line side.
Detents on the longer pins hold the protector in place when
it is pulled out to an intermediate position to disconnect the
line. When in this position, the distribution pairs continue to
be protected.
12.0 Multiple Pairs
12.01 Identify the Pair Connector that is to be double jumpered.
12.02 Remove the Pair Cover or Priority Cap.
12.03 Attach a 4501-E Pair Connector to the Pair Connector
previously installed.
12.04 Terminate the designated wire pair into the Pair Connector.
See section 10.0 Distribution Wire Installation for termination
steps.
12.05 Replace Pair Cover or Priority Cap if required.
12.06 If a third jumper is to be added, repeat steps 12.01 through
12.04.
Note: No more than three (3) Pair Connectors may be terminated
on any single pair location.
10
74201
13.0 Testing
Note:
Use a 4727-A Single-Pair Test Probe or the temporary test
probe as described in Section 3 to access the circuit.
13.01 Remove the Pair Cover or Priority Cap from the pair connector
to be tested and attach the 4727-A Test Probe or the temporary
test probe as you would with a normal Pair Connector.
13.02 Attach the test equipment to the probe and run the test.
13.03 Remove the Test Probe and replace the Pair Cover or Priority
Cap.
14.0 Distribution Wire Removal
14.01 Identify wire pair to be removed.
14.02 Pinch latch on the Pair Connector and swing the cap to the right.
14.03 Remove the wires from the cap.
Note: If this wire pair is to be re-terminated, the ends of the wires must be trimmed for 1/2" (13 mm).
14.04 If a new wire pair is to be installed, see section 10.0.
14.05 If a wire pair is not to be installed, close the cap re-latching the Pair Connector cap and body.
Note: See section 20.0 for use of the Jumper Tool.
15.0 Pair Connector Removal
15.01 Single Pair Connector Removal
a: Identify Pair Connector to be removed.
b: Using the forefinger and thumb, pull the Pair Connector
firmly and straight out from the terminal block .
Note: If using the Jumper Tool see section 20.03.
15.02 Multiple Pair Connector Removal
a: Identify Pair Connector to be removed.
b: Place a finger on the hinge of the bottom Pair Connector to
hold the bottom Pair Connector(s) in place.
c: Using the forefinger and thumb, pull the desired Pair
Connector firmly and straight out from the terminal block .
Note: If using the Jumper Tool see section 20.03.
11
16.0 Expansion: Installation of the 4730-SK Kit (Option):
16.01 The capacity of a partially filled 4730 PET may be expanded
to 50 or 100 pairs by the following method: (If only expanding to
50 pairs, omit steps g and j).
Note: f pair count requirements have outgrown the initial cable
installation, add cable following the procedure in section 8.0 using
the 4892 Gland Kit.
a: With color-coded cable ties, identify the module wire group(s)
of the protector receptacle field(s) group(s) being installed.
Apply the appropriate pair count labels to wire guide tabs at
the top and bottom of the 4500 Terminal Block(s). [A]
Note: Clean wire guide tabs with isopropyl alcohol before applying labels.
b: Open the splice chamber cover. [B]
D
C
E
D
A
c: Loosen the screws on appropriate protection blank field plate(s). [C]
d: Remove four (4) protector receptacle field panel mounting screws. [D]
K
B
e: Carefully tilt out and lower the protector receptacle field
panel exposing the back side. [E]
f: Remove the loosened blank field plate screws and the plate(s).
g: When expanding to 100 pair capacity, connect a temporary bond
between the shield connector and the three-port ground bar. Remove
the incoming cable ground wire that is connected to the protector
receptacle field tab, [F] saving the brass screw, nut and star washer.
h: Install the protector receptacle field(s) of the 4730-SK
assembly(ies) by placing it into the corresponding opening of
the protector receptacle field panel (from the back side) using the
four (4) screws removed in step f. [G]
K
A
i: Connect the protector receptacle field grounding tab(s)
together with the hardware provided in the 4730-SK kit(s). [H]
j: Reattach the ground wire to a bottom protector receptacle field
tab [J] using the brass screw, nut and star washer from step g.
Remove the temporary bond.
k: Secure the conductor group from the MS 2™ Module or 710
Connector with a cable tie to either the top or bottom holes in
the side of the protector receptacle field panel.
G
l: Reinstall protector receptacle field panel in the top of the terminal.
E
Note: Make sure that none of the wires become pinched.
m: Position the 4500 Terminal Block portion of the 4730-SK on the
mounting frame [K] with the white/blue pair toward the top.
Attach to the frame by pushing toward the rear of the terminal
until it latches.
n: To remove the 4500 Terminal Block from the mounting frame,
gently insert a small screw driver or other suitable tool
between the frame and the outside plastic wall on one end of
the block. Then gently push the tool towards the center of the
block to release the catch, while gently pulling the block
outward. Repeat procedure on opposite end.
o: Gather the wire bundles on the right-hand side and tie wrap for
housekeeping purposes.
p:
Now terminate the appropriate protector receptacle modules to the
corresponding cable pairs or modules in the splice chamber. See
Section 9.0.
12
F
H
J
17.0 Vertical Multiple Terminal Installation (Option):
17.01 The design of the splice chamber enables up to three (3) terminals to be stacked vertically (dependent on
cable diameter). Vertical stacking is used when the entrance cable pair count is greater than the capacity of
a single terminal or when the installation design requires that only a portion of entrance cable pairs be
initially terminated.
a: Attach the terminals to the appropriate location in a vertical arrangement. Use the mounting template
to ensure proper spacing between terminals.
b: When stacking vertically, a 4889 Coupling Kit must be used to connect cabinets at splice chambers.
c: Install stacking units starting from the bottom.
Note: When using the coupling kit, the plastic fingers on the gland must be trimmed.
4889 Coupling
Kit
873589
883707
d: Conductor length should be equal to or longer than the vertical length of the mounted PETs. Remove
cable sheath, leaving a minimum of 1/2" (13 mm) of core wrap to protect the cable from the bonding
connector.
e: Identify and tape the ends of the binder groups to keep the conductors from unwinding during splicing.
f: Install binder groups into the corresponding terminal through the entry gland.
g: For wire termination onto pre-connectorized stub, refer to the splicing instructions in Section 9.0.
h: When the installation design requires that only a portion of the entrance cable pairs be initially
terminated, the unused pairs should be a minimum of 27" (688 mm) past the farthest terminal cable
entry port and properly grounded. Dress these pairs neatly in the splice chambers.
18.0 4791 Metal Skirt (Option):
18.01 If the 4791 Metal Skirt is to be installed, refer to the installation instructions that come with the skirt
for the correct installation procedure.
19.0 1/2 Ringer Installation (Option):
19.01 When 1/2 Ringers are installed, they are to be terminated in the
first level block of 4501 Pair Connectors located on the 4500
Terminal Block.
a: Make sure a 4501 Pair Connector is in the desired location
on the 4500 Terminal Block.
b: Trim the leads of the 1/2 Ringer to the desired length.
c: Insert the 1/2 Ringer tip and ring leads in the proper Pair
Connector Cap wire ports. Hold the wire pair in place while
firmly pressing the Pair Connector Cap towards the Terminal
Block with the thumb until the cap is latched to the Pair
Connector body. (Refer to sections 10.05 and 10.06.)
d: After the 1/2 Ringer is terminated, dress to conform with
good housekeeping practices.
e: Now refer to section 10.0 for installation of Distribution
wire.
13
20.0 Jumpering Tool (Option):
Note: A Pair Cover or Priority Cap must be installed on the Pair
Connector when using the Jumpering Tool.
20.01 Opening the Pair Connector:
a: Gently push the Jumpering Tool onto the Pair Connector
until it is fully seated.
b: Continue to push the Jumpering Tool toward the Pair
Connector and swing the cap to the right.
c: Remove the Jumpering Tool.
20.02 Closing/Terminating the Pair Connector:
a: Trim the wires and insert them into the Pair Connector cap
wire ports; Tip (A) to the top and Ring (B) to the bottom.
Note: Be sure that the wires are inserted fully into the Pair
Connector cap and are clear of the latch prior to
Termination.
b: Hold the wire pair in place while gently pushing the
Jumpering Tool onto the Pair Connector until it is fully
seated.
c: Continue to push the Jumpering Tool toward the Pair
Connector and swing the cap to the left until the cap is fully
latched.
d: Remove the Jumpering Tool.
f: Place wire pair through the jumper run guides on the bottom
side of the Terminal Block.
20.03 Pair Connector Removal:
a: Place the hook end of the Jumpering Tool behind the hinge
area of the Pair Connector and pull straight out FIRMLY.
14
15
Important Notice
All statements, technical information and recommendations related to the Seller's products are based on information believed to be
reliable, but the accuracy or completeness thereof is not guaranteed. Before utilizing the product, the user should determine the suitability
of the product for its intended use. The user assumes all risks and liability whatsoever in connection with such use.
Any statements or recommendations of the Seller which are not contained in the Seller's current publications shall have no force or effect
unless contained in an agreement signed by an authorized officer of the Seller. The statements contained herein are made in lieu of all
warranties, express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose
which warranties are hereby expressly disclaimed.
SELLER SHALL NOT BE LIABLE TO THE USER OR ANY OTHER PERSON UNDER ANY LEGAL THEORY, INCLUDING BUT NOT
LIMITED TO NEGLIGENCE OR STRICT LIABILITY, FOR ANY INJURY OR FOR ANY DIRECT OR CONSEQUENTIAL DAMAGES
SUSTAINED OR INCURRED BY REASON OF THE USE OF ANY OF THE SELLER'S PRODUCTS THAT WERE DEFECTIVE.
Telecom Systems Division
6801 River Place Blvd.
Austin, TX 78726-9000
800/426-8688
Printed in USA
© 3M 1997 34-7035-1394-4-C
16