Size Of Grounding Conductor Screw - Siemens SIMOTICS A 1FU9 Operating Instructions Manual

Electrical connection
7.4 Connecting the grounding conductor
Internal ground terminal
Comply with the following instructions when connecting up:
• Ensure that the connecting surface is bare and is protected against corrosion using a suitable
substance, e.g. acid-free Vaseline.
• Arrange the spring lock washer under the screw 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.
External ground terminal
Comply with the following instructions when connecting up:
• Ensure that the connecting surface is bare and is protected against corrosion using a suitable
substance, e.g. acid-free Vaseline.
• Locate the cable lug between the contact bracket and the grounding bracket; do not remove
the contact bracket pressed into the enclosure.
• Arrange the flat washer and spring washer under the bolt head.
• Use the marked connection location for the grounding conductor on the stator housing.
• Observe the tightening torque for the locking screw.
7.4.4

Size of grounding conductor screw

Table 7-4
76
Size of grounding conductor screw
Frame size
71 ... 90
112
132 ... 160
Thread size for the grounding conductor
M4
M5
M6
Operating Instructions, 10/2023, A5E46712792A
1FU9