Installation
notes
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| Bending
radius |
- Draw-in according to EN
50173: at least 8x outer diameter.
The only exception is if the cable manufactor allows a smaller bending
radius.
- Always observe the
information supplied in the data sheets. Two bending radii may be
specified therein. If so, then:
- Use the larger of the
bending radii when drawing-in
(repeatable several times)
- Use the smaller of the
bending radii after drawing-in
(once only)
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| Cable
draw-in |
- Lay the cable
immediately as it comes off the roll
Use only the appropriate hoist to shift the cable roll
- To avoid the danger of
cable twisting, never unroll the cable to side over the flange.
- Draw in the cable using
only a cable stocking and ensure that cable end is always well closed.
- When using the draw-in
tool, use all the wires when drawing.
Use insulating tape on the open wires between the draw.in tool and the
cablesheath.
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| Connections
to patch panels and wall outlets |
- Basicaly follow the
installation instructions of the connection hardware used.
- Extra (reserve) lengths
should be avoided.
- For cables having
twisted pairs covered by metal foil (S/STP,PiMF), bring the screen
foil as close as possible to the connecting terminal.
- For cables having pair-
or star-quad stranded wires covered with an intermediate/ protective
sheath and metal foil, bring the intermediate/ protective sheath and
metal foil as close as possible to the connection terminal.
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| Heat
effects |
Foamed
wires are sensitive to direct heating influences. This means that the
channel should never be subjected to hot-air blowers or gas burners, such
as those used for heat-shrinkable tubing. |
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| Instructions,
standards and guidelines |
Fundamentally
always applicable are the instructions and guidelines implemented in each
country and prescribed by hardware and component suppliers. |
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| Lubricants
when drawing cables |
- Never use milk grease or
other oil- and grease-containing materials.
- The following lubricants
may be used when drawing cables:
- Yellow mass
(wire-drawing,
Lubricant from Klein Tools;51000
- Talcum, dishwashing
detergent,
washing detergent, yellow soap.
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| Open
installation, breaking trough walls, cable channels |
- There is a special
difference between the installation of Uninet or other data cables and
conventional installation cables.
- Cable may only be
installed in the open if, in the entire area (risers, connection
shafts, telephone distributor rooms, etc), there are no possibilities
for damaging the cable.
- The cables can be fixed
in place using clamps (fast cable installer) or cable ties on profile
tracks (cable trays, lattice channels). The cables must not be crushed
by the fixing methods used. Please also observe the paragraph "Pressure
on the data cable".
- Break or round all of
edges of wall break-troughs before installing cabling. This avoids
damage to the cable sheath when drawing in and later fixing in place.
- Do not exceed the
cable-bending radius specified by the manufacturer.
- For direction changes,
the radius of the cable channels must correspond to the allowable
bending radius specified for the cables.
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| Pressure
on the data cable |
Avoid
any pressures on the data cable.
Pressure points affecting the wires can have a negative effect on
transmission properties. The most frequent causes of pressure points are
improper fixing using clamps, fast cable installers or cable ties,
crossing the cable and stepping on data cables. |
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| Quality
assurance at the construction site |
Please
check the following items:
- Was the correct cable
delivered?
- Is any transport damage
visible?
- Has an intermediate
store for the cable been organised at the construction site?
- Do the categories of
cable and connecting components agree?
- Are screened connection
components available for screened cables?
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| Spacing
to other cable types |
Always
position data cables in cable channels separated from other cable types
(use separators). In this way, you avoid possible influences.
See also the paragraph "Instructions, standards and
guidelines". |
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| Storage |
- If Uninet or other data
cables are not immediately installed after delivery, then they should
be stored in an area protected from mechanical and thermal influences.
- The storage area must be
dry and protected from climatic influences.
- Leave the goods to be
stored in their original packing until they are to be installed.The
ends of the cable must always be well closed. The reason for this is
the relatively loose construction of the cable (for all symmetrical
data cables). Capillary effects are possible in such construction,
which allows fluids to enter the cables. This could change the
capacitance and impedance of the cables, which, in turn, could
negatively effect transmission properties.
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| Tensile
strength for data cables |
The
allowable tensile strength are specified in the Uninet Data Sheets. |