Siemens SIMOTICS A 1FU8, Operating Instructions Manual

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Electrical connection
6.4 Connecting the grounding conductor
1FU8
Operating Instructions, 02/2016, 5 610 70000 02 000
61
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
6.4.3 Minimum surface area of grounding conductor
Table 6- 5 Minimum cross-sectional area of grounding conductor
Minimum cross-sectional area of phase conduc-
tor for installation
S
[mm²]
Minimum surface area of associated grounding
connection
[mm²]
S ≤ 16 S
16 < S ≤ 35 16
S > 35 0.5 S
6.4.4 Ground connection inside and outside
Internal ground connection
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.
● Comply with the tightening torque for the terminal screw.