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Use fiber paper protection at cable break off. If using thin paper, 2 wraps
is needed.
Do not hesitate to cut tie wraps installed by Bechtel. We are responsible for
the last secured position. Use white tie wraps all the time.
CABLING
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Harness the cables so they break off like waterfalls. As much as possible, tie
them on top of ladder and not to the side. The RF jumpers are flexible, they
are easy to dress.
Avoid tying to the side.
If cables are too short to
be dressed as required
upon break, note this as
an observation in the
RBS checklist.
Tied on top. Follow for
T1, RF, power, ground
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GOOD
Default Bechtelinstallation.
BETTER
After
harnessing
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POWER
Strain relief clamp (3 screws)
Torque= 0.8 Nm
+24V DCCU Connection (8
screws)
Torque= 4.5 Nm
DCCU Cover (1 screw)
Torque= 1.5. Nm
Install fiber papers
Do not forget to test and trace the cables before terminating.
Do not trust the labels!
To do this, I suggest you measure the voltage of each pair to
verify (+)cables and then trace physically the (-) cables.
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Stripped length
= about 15 mm
No
shiners
Use the terminals as
reference for length.
Must have no shiners.
Use thin amount of
No-OX.
P or D-Tags!
Review labels to
make sure they are
installed to the
intended cable. The
print can be readfrom top to bottom.
In this example, the
tags were installed
correctly, but the
labels were not.
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Secure T1 cables at these locations using sticky backs and small
tie wraps. One of top most, one in the bottom between the 1st and
2nd screw
Tie wraps
Attached T1 labels tothe existing flags
T1 CABLES
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Do not roll the cables in loop. Run them back and
forth in the ladder rack
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Install fiber papers when T1 cables cross/touch the edge of
ladders or cross/touch other cables such as ground, DC and RF.
Missing fiberpapers
You may wrap
either the cableor the ladder
rack with fiber.
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GROUNDING
When using hand crimper, 2 crimps for standard barrel (above) and 4 crimpsfor long barrel (below). Crimps should be within the band/s.
Torque to 15 Nm
Ground lug should be #2 (Brown) 1 hole lug with inspection hole.
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Conductor must reach
and be seen at this
inspection hole. Also,
no excess conductor
should protrude.
Use a thin amount of NO-OX
(above). Below are common
mistakes.
Not OK.
No NO-OX
Not OK.
Excessive NO-
OX
OK. Must have
no shiner
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Fit the jumpers to the rubber slots directly above the FU.
Torque connections to 25 Nm
RF JUMPERS
Recommended