Connecting Cables Without Cable Lugs - Siemens SIMOTICS FD 1LH1 Operating Instructions & Installation Instructions

Electrical connection
6.5 Inserting and routing the cables
5. Place the cable lug on the terminal support. If you are using a disconnecting link, check its
6. Tighten the fixing element
Note
You can find more information in Chapter 2 of catalog D81.8.
6.5.6

Connecting cables without cable lugs

Lug terminal connections - which are suitable for connecting flexible and stranded conductors
without the use of wire end ferrules - may be installed if ordered accordingly. If you wish to use
conductor end sleeves, then correctly crimp these onto the end of the conductor before
connecting up.
NOTICE
Overheating of the conductor ends
If the end of the conductor is not correctly enclosed by the wire end ferrule, but is trapped by
it, this can lead to overheating.
● Insert only one conductor end into each wire end ferrule, and attach the wire end ferrule
● Insert only one conductor end into each terminal.
Procedure
When connecting, carefully maintain the minimum clearances and creepage distances.
1. Open the terminal box and cut the cable to the correct length.
2. Prepare the end of the cable depending on the cable and its use. It is not permissible that
3. Insulate the conductor ends in such a way that the remaining insulation reaches almost up
90
positioning.
For terminal boxes 1XB7740 and 1XB7750, place the cable lug on the busbar.
Fixing element
Fastening screw M12
Fixing screws M16
Fixing nuts M12
correctly.
The clips of the 1XB7730/1XB7731 terminal boxes can accept cables with maximum
185 mm² cross-section.
the cable connection is subject to external forces.
to the cable lug.
②
with the corresponding tightening torque:
Tightening torque
20 Nm
40 Nm
20 Nm
SIMOTICS FD 1LH1
Operating Instructions 01/2019