Connecting Cables Without Cable Lugs - Siemens SIMOTICS FD 1MQ1 Operating And 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.
Explosion hazard if cable lugs without side guards are used
For cable cross-sections under 70 mm
minimum air clearances may be underrun and cause an explosion.
This can result in death, serious injury, or material damage.
● For cable cross-sections under 70 mm
● Make sure that the minimum air clearances (Page 88) are observed.
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.
84
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
WARNING
correctly.
②
with the corresponding tightening torque:
, cable lugs without side guard may twist. The
2
, use only cable lugs with side guard.
2
Tightening torque
20 Nm
40 Nm
20 Nm
SIMOTICS FD 1MQ1
Operating Instructions 01/2019