Routing The Cable Into The Terminal Box; Terminal Boxes With Type Of Protection "Ex D/Ex Db - Siemens SIMOTICS HV C Operating And Installation Instructions

6.2.4

Routing the cable into the terminal box

Normally the cable entry plate is supplied drilled. The number and size of the cable entry tapped
holes is provided in the machine dimension drawing.
Inserting the cable into the terminal box
1. Only use cable entries that are suitable for the cable.
2. Only use suitable cable entries and cables for the prevailing ambient temperature.
3. Ensure that the power cables are strain relieved where they enter the terminal box.
4. Carefully connect the cable and ensure a reliable protective conductor connection.
5. Tighten the glands and the elements for the strain relief with the torque specified by the
6. Check the cable glands and cables to ensure that they are correctly sealed and firmly
7. Correctly close and seal threads or holes that are not being used ensuring that the IP degree
Rotating the terminal box
Depending on the particular version, the terminal box can be rotated. It can then be rotated
through increments of 90° corresponding to the connection direction.
If necessary, contact your Service Center (Page 111).
6.2.5

Terminal boxes with type of protection "Ex d/Ex db"

With terminal boxes of protection type "Ex d" or "Ex db", the type and size of the cable entry
threads and the type of protection are stated on the terminal box.
● The cable entries must be suitable for the cables.
● The cable entries and cables must be suitable for the ambient temperature.
SIMOTICS HV C 1NB1402-2AA84-4CA0-Z
Operating Instructions 06/2018
manufacturer.
seated.
of protection is maintained. The IP degree of protection is specified on the rating plate.
WARNING
Explosion hazard when non-approved components are used
If cable entries, pipe or conduit systems, and filler plugs of a simple design are used with
terminal boxes with type of protection "Ex d" or "Ex db", this can result in an explosion
during operation. This can result in death, serious injury, or material damage.
● Use only filler plugs with type of protection "Ex d/Ex db" that have been tested and
certified in accordance with IEC / EN 60079-1 to plug holes that will not be used.
Electrical connection
6.2 Preparation
57