Siemens SIMOTICS XP 1MB1 series - Connection With;Without Cable Lugs; Thread Sizes in the Terminal Box

Electrical connection
6.2 Connecting the machine
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
74 Operating Instructions, 06/2018, A5E44455710A
6.2.1.8
Connection with/without cable lugs
In the case of terminals with terminal clamps, distribute the conductors in such a way that the
clamping heights on both sides of the fillet are about the same. This method of connection
requires that you must bend a single conductor in a U shape or use a cable lug. The same
applies to the inner and outer terminals of the ground conductor.
When connecting up using cable lugs, select their size corresponding to the required cable
cross-section and the stud size. An inclined arrangement is only permitted provided the
required air clearances and creepage distances are carefully maintained.
Remove insulation from the ends of the conductors so that the remaining insulation almost
reaches the cable lug.
Note
The direct contact between the cable lug surfaces and the contact nuts or contact screws
ensure that the connection can conduct current.
WARNING
Short-circuit hazard
Live conductors released from the terminal board can cause short circuits. Death or serious
injury can result.
• You must bend single-core line conductors into a U shape in order to prevent th
e
c
ontact force being transferred at just one side.
• In order to prevent the cable lug from rotating, for a line connection using a cable lug,
angle single- or multi-core cables downwards through an angle of approx. 40°.
6.2.1.9
Thread sizes in the terminal box
Shaft height
Threaded entry
Size
Quantity
71 ... 90 M 16 x 1.5
M 25 x 1.5
1
100 ... 132
M 32x1.5
2
160 ... 180 M 40x1.5 2
200 ... 225
M 50x1.5
2
250 ... 315
M63x1.5
2
355
M 80x2
2
Thread size for additional entries, e.g. PTC thermistor or heater M16x1.5 or M20x1.5.
Other thread sizes are possible as an option.