Minimum Surface Area Of Grounding Conductor; Grounding Connection Type - Siemens SIMOTICCS A 1FU9 Operating Instructions Manual

6.6.2

Minimum surface area of grounding conductor

Table 6-3
Minimum cross-section of the phase conductor
6.6.3

Grounding connection type

Type of enclosure grounding
Connection of an individual conductor under the
external grounding bracket.
Connection is made using a DIN cable lug under
the external grounding bracket. DIN 46 234
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.
1FU9
Operating Instructions, 07/2020, A5E46712792A
Minimum cross-sectional area of grounding conductor
for installation
S
[mm²]
S ≤ 25
25 < S ≤ 50
S > 50
Electrical connection
6.6 Connecting the grounding conductor
Minimum cross-section of the associated
grounding connection
[mm²]
S
25
0.5 S
Conductor cross-sec‐
tion
mm²
... 10
... 25
65