Transport, installation and assembly
3.10 Connection of the machine
A5E01083943A AB
54 Siemens AG Operating Instructions 2.02 1FW4
Cable entry and routing
Connecting cables and in particular the PE ground conductor in the terminal box should be
laid out in an open arrangement in such a manner that chafing of the cable insulation is
prevented.
Auxiliary cables fed in externally must be routed separately from the main cable and
secured. Elements with cable ties are located on the floor of the terminal box next to the
walls for this purpose.
Screw-type cable connections should normally be used (not included in the delivery scope).
In special cases the connecting cable is sealed at the cable entry point using a cut-out seal
insert and is fastened using a strain relief device. The strain relief device can be located
either in the terminal box or externally.
We recommend the following procedure:
● Cut out the seal insert in such a way that its opening is 1 to 3 mm smaller than the cable
diameter. If the cable diameter is too small, this should be increased by applying a layer
of suitable sealing tape around the conductor.
● After inserting the seal, make a termination to match the cable and connect a grounding
cable to it. If the cable has external armoring, do not route it directly into the terminal box,
but just up to the strain relief device, which in this case should also be fitted externally.
This prevents moisture from penetrating into the terminal box.
● Unscrew the upper section of the strain relief device and release the mounting screws for
the lower section. Insert the cable with seal insert into the gland opening. When the cable
is positioned concentrically inside the gland opening, screw the strain relief clip together
and secure it.
1P
Figure 3-6 Strain relief device and sealing insert
Note
Tighten the clamping screws of the strain relief clip as much as necessary to produce the
required effect but not so much as to damage the insulation. The recommended
tightening torque is 5 Nm (see illustration).
On cables without secured routing, cable entries should be used with a strain relief device
which is protected against twisting (e.g. similar to DIN 22419).
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