Cable Glands; Terminal Boxes, End Shields, Grounding Conductors, Sheet Metal Fan Covers - Siemens SIMOTICS SD Operating Instructions Manual

Electrical connection
6.2 Tightening torques
6.2.2

Cable glands

Note
Avoid damaging the cable jacket.
Adapt the tightening torques to the cable jacket materials.
You should refer to the table in order to find the correct tightening torque for any metal and
plastic cable glands that are to be mounted directly on the machine, as well as for any other
screw-type connections (such as adapters).
Table 6- 6 Tightening torques for cable glands
Metal
± 10%
[Nm]
M 12 x 1.5
M 16 x 1.5 10
M 20 x 1.5 12
M 25 x 1.5
M 32 x 1.5 18
M 40 x 1.5
M 50 x 1.5 20
M 63 x 1.5
The cable glands must have an EC-type examination certificate and be certified for the
respective hazardous zone.
● Any openings that are not being used must be sealed using using the appropriate
certified plugs.
● Please observe the manufacturer's specifications when fitting cable glands.
6.2.3

Terminal boxes, end shields, grounding conductors, sheet metal fan covers

If no other tightening torques are specified, then the values in the following table apply.
Table 6- 7 Tightening torques for screws on the terminal box, end shields, screw-type grounding conductor connections
Thread ∅
Nm
54
Plastic
± 10%
[Nm]
8 1,5
2
4
6
M 4
min 2
max 3
Clamping range [mm]
Standard
-30 °C ... 100 °C
Ex
-30 °C ... 90 °C
3,0 ... 7,0
4,5 ... 10,0
7,0 ... 13,0
9,0 ... 17,0
11,0 ... 21,0
19,0 ... 28,0
26,0 ... 35,0
34,0 ... 45,0
M 5 M 6 M 8
3.5 6 16
5 9 24
Ex
-60 °C ... 105 °C
-
6,0 ... 10,0
6,0 ... 12,0
10,0 ... 16,0
13,0 ... 20,0
20,0 ... 26,0
25,0 ... 31,0
-
M 10 M 12
28 46
42 70
Operating Instructions, 05/2014, 5 610 00000 02 000
O ring
Cord dia.
[mm]
2
M 16 M20
110 225
165 340
Low-voltage motors