TECP-90-708 • Issue 5 • April 2017
8. Install the edge protector on the FOTSP in the location shown in Figure 32 .
9. Install the hole cover in the location shown in Figure 29 on Page 32 .
10. Re-install the front and rear troughs, as shown in Figure 26 on Page 30 .
11. Re-install FOTSP front and rear guard boxes (reverse of steps 3 and 4, and reverse of what is shown in Figure 27 on Page 31 and Figure 28 on Page 31 ).
5 INSTALLING A RAISED FLOOR CABLE BRACKET
If cables will be brought into the frame from under the raised floor, a Raised Floor Standard
Cable Clamp Bracket (available from CommScope) must be installed on the rear side of the frame in the bottom right corner.
The kit is designed for standard size cables, with an Outside Diameter (OD) of up to 0.8 in.
(2.03 mm). If large cables are to be installed, with an OD in the range from 0.8 to 1.03 in. (2.03
to 26.16 mm), a large cable kit (NG4-ACCRFCLMP3) is also required.
This procedure covers both standard and large cables, and assumes that the installer has the kit or kits required.
Use the following procedure to install a raised floor cable clamp bracket.
1. Determine whether the cables to be installed are standard or large as defined above. Set out the bracket plate (largest piece in the kit) and identify the hole pattern to be used for mounting cables, referring to Figure 33 on Page 36 . There are separate hole patterns for
large and standard cables.
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TECP-90-708 • Issue 5 • April 2017
Page 36
© 2017, CommScope, Inc.
Figure 33. Grommet Placement on Bracket
TECP-90-708 • Issue 5 • April 2017
2. Install 8-32 x 5/16 inch pan head screws as shown in Figure 33 , Figure 34 , and Figure 35 .
Leave enough space between the screw heads and bracket for the cable clamps to be hung on the screws in a later step.
NOTE: DO NOT DRIVE THE S CREW
HEAD S TIGHT AGAIN S T THE
BRACKET. ALLOW S UFFICIENT S PACE
BETWEEN THE S CREW HEAD S AND
BRACKET FOR THE CABLE CLAMP S
TO BE HUNG ON THE S CREW S .
25127-A
183 2 x 5/16 IN.
PANHEAD S CREW
(24 PLACE S ,
EACH S IDE; 48 TOTAL)
Figure 34. Standard Cable Screw Placement
NOTE: DO NOT DRIVE THE S CREW
HEAD S TIGHT AGAIN S T THE
BRACKET. ALLOW S UFFICIENT S PACE
BETWEEN THE S CREW HEAD S AND
BRACKET FOR THE CABLE CLAMP S
TO BE HUNG ON THE S CREW S .
183 2 x 5/16 IN.
PANHEAD S CREW
(12 PLACE S , EACH S IDE;
24 TOTAL)
2512 8 -A
Figure 35. Large Cable Screw Placement
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TECP-90-708 • Issue 5 • April 2017
3. If the frame has a splice chassis: a. Remove the splice chassis cover (if present) from the bottom rear of the NG4access frame, as shown in Figure 36 . To do this, remove the two #8 pan head screws and two star washers securing the cover to the frame. Set aside these items for re-installing the cover later.
REAR VIEW
OF FRAME
251 3 7-A
Figure 36. Removing Front Plate from Frame b. Fully slide out the splice chassis (if present), as shown in Figure 37 .
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© 2017, CommScope, Inc.
REAR VIEW
OF FRAME
Figure 37. Sliding Out the Splice Chassis
2516 8 -A
TECP-90-708 • Issue 5 • April 2017
4. If the frame does not have a splice chassis, remove the cover shown in Figure 38 .
REAR VIEW
OF FRAME 25161-A
Figure 38. Removing Rear Cover on a Non-Splice Frame
5. Place the cable bracket into the cable entry hole, and position the holes in the bracket on the threaded studs, as shown in Figure 39 . Install a #10 washer and #10 nut on each threaded stud. Tighten to 16 inch lbs. (1.8 Newton meters).
Note: This illustration shows a frame without a splice chassis.
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TECP-90-708 • Issue 5 • April 2017
25171-A
PO S ITION BRACKET ON
THREADED S TUD.
IN S TALL #10 WA S HER
AND #10 NUT
(TWO PLACE S ).
TIGHTEN TO 16 INCH-LB S .
(1.8 NEWTON METER S )
Figure 39. Installing Bracket in Frame
6. Route the cables to be installed through the entry hole, taking care to position each cable on the correct side of the raised floor cable breakout per the cable clamp locations shown in Figure 33 on Page 36 .
Note: The Row locations shown in this same figure ( Figure 33 on Page 36 ) will also be used to figure out the DIM ‘A” values when breaking out the cables in the next step.
7. Prepare each cable as follows, referring to Figure 40 : a. Pull the cable up through the hole.
b. If the cable being installed is an NG4access cable terminated with one or more cabled module(s), obtain the appropriate DIM ‘A’ length from Table 5 based on where the cable clamp will be installed on the bracket, measure out this length from the factory breakout on the cable, and mark the cable at this location as shown in Figure 40 . This is where the cable clamp should be placed on the cable.
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© 2017, CommScope, Inc.
TECP-90-708 • Issue 5 • April 2017
Note: There is no need for further breakout as all NG4access cables with cabled modules are of one standard length.
Table 5. Row Position vs. DIM ‘A’
CABLE SIZE
Standard
Standard
Standard
Standard
Large
Large
E
F
C
D
ROW
POSITION* DIM ‘A’
A
B
3-1/16 in. (80.96 mm)
4-11/16 in. (119.06 mm)
5-7/16 in (138.11 mm)
7-3/32 in. (180.18 mm)
3-7/8 in. (98.42 mm)
6-5/16 (160.34 mm)
* per Figure 33 on Page 36
S TANDARD LENGTH
BREAKOUT
DIM ‘A’ CABLE
CLAMP
OUTER CABLE JACKET
25140-A
Figure 40. Cabled Module Assembly Cable Clamp Position and Breakout c. If the cable being installed is designated for the splice chassis, obtain the appropriate
DIM ‘A’ length from Table 5 based on where the cable clamp will be installed on the bracket, and measure an additional length of 210 in. (533.4 cm), as shown in
Figure 41 . This is where the cable clamp should be placed on the cable. For cable routing instructions, refer to NG4access ODF Platform Splice Chassis and Splice Tray
User Manual (TECP-90-704).
210 IN. (5 33 .4 CM)
BREAKOUT
DIM ‘A’ CABLE
CLAMP
OUTER CABLE JACKET
2516 3 -A
Figure 41. Splice Cable Clamp Position and Breakout
8. If the cable diameter is 0.8 in (2.0 cm) or less, assemble the “standard” cable clamp at the cable clamp position (see Figure 42 ). There are different sizes of grommets, measured by their inside diameters of 0.4, 0.5, 0.6, and 0.7 in. (1.0, 1.27, 1.52, and 1.78 cm). Select the grommet with an inside diameter that is one size smaller than the outside diameter of the cable. After assembling the components on the mounting screws, tighten the screws until the yokes make contact, then tighten the screws four additional revolutions.
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TECP-90-708 • Issue 5 • April 2017
MOUNTING
S CREW S
(63 2 x 1.75 IN.)
GROMMET
BACK
PLATE
RUBBER
YOKE
251 3 6-A
COVER
Figure 42. Standard Cable Clamp Exploded View
9. If the cable diameter is greater than 0.8 in (2.03 cm) and less than 1-1/32 inch (2.62 cm), assemble the “large” cable clamp at the cable clamp position (see Figure 43 ). There are different sizes of grommets, measured by their inside diameters of 0.8, 0.9, and 1.0 in.
(2.03, 2.29, and 2.54 cm). Select the grommet with an inside diameter that is one size smaller than the outside diameter of the cable. After assembling the components on the mounting screws, tighten the screws until the yokes make contact.
MOUNTING
S CREW S
(103 2 x 2.00 IN.)
GROMMET
BACK
PLATE
RUBBER
YOKE
251 3 5-A
COVER
LARGE
Figure 43. Large Cable Clamp Exploded View
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TECP-90-708 • Issue 5 • April 2017
Note: Do not continue to tighten as instructed for the standard cable clamp in Step 8 .
Note: If large cables are being installed, the last four cable clamps may need to be assembled on the cable below the raised floor.
10. Beginning at the back of the cable clamp bracket (in the middle of the frame), hang the cable clamps by positioning the hanging slots on the mounting screws, as shown in
Figure 44 . Be sure to position the clamps on the correct mounting screws as indicated in
Figure 45 . Work from the back of the bracket towards the rear of the frame. After hanging a cable clamp on the mounting screws, tighten the mounting screws until secure.
NOTE: S TART HANGING CABLE CLAMP S AT
THE BACK OF THE BRACKET, WORK TO THE
REAR OF THE FRAME. LA S T FOUR CLAMP S
MAY NEED TO BE IN S TALLED BELOW THE
RAI S ED FLOOR.
MOUNTING
S CREW S
CABLE BRACKET
CABLE
CLAMP
ROW C
ROW D
REAR OF
FRAME
251 3 9-A
Figure 44. Hanging Cable Clamps on Bracket
HANGING
S LOT
EXAMPLE S OF S TANDARD
CLAMP PO S ITION S
EXAMPLE S OF LARGE
CLAMP PO S ITION S
ROW F
Figure 45. Correct Placement of Cable Clamps
25141-A
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