Siemens SIMOTICS GP series - Minimum Surface Area of Grounding Conductor; Grounding Connection Type

Electrical connection
6.4 Connecting the grounding conductor
Standard motors SH 63 ... 355
Operating Instructions, 12/2018, A5E38483075A
69
6.4.1 Minimum surface area of grounding conductor
Table 6- 3 Minimum cross-sectional area of grounding conductor
Minimum cross-section of the phase conductor
for installation
S
[mm²]
Minimum cross-section of the associated ground-
ing connection
[mm²]
S ≤ 25
S
25 < S ≤ 50 25
S > 50
0.5 S
6.4.2 Grounding connection type
Enclosure grounding method
Conductor cross-
section
mm²
Connection of an individual conductor under the
external grounding bracket.
… 10
Connection is made using a DIN cable lug under
the external grounding bracket. DIN 46 234
… 25
Internal ground terminal
When making connections, ensure the following:
● Ensure that the connecting surface is bare and is protected against corrosion using a
suitable substance, e.g. acid-free Vaseline.
● Arrange the flat washer and spring washer under the bolt head.
● Locate the cable lug under the clamping bracket.
● Use the terminals designated for the grounding conductor in the terminal box.
● Observe the tightening torque for the locking screw.