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)

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.

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.

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.

Instructions, standards and guidelines Fundamentally always applicable are the instructions and guidelines implemented in each country and prescribed by hardware and component suppliers.

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.

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.

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.

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?

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".

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.

Tensile strength for data cables The allowable tensile strength are specified in the Uninet Data Sheets.
 
26.11.2002