Siemens SIMOTICS XP - Terminal Box

Electrical connection
6.1 Connecting the machine
1MB..5/6 shaft height 71 ... 355
Operating Instructions, 07/2020, A5E41926185A
71
6.1.2.6 Thread sizes in terminal box Ex e and Ex d
Shaft height
Threaded entry
Size
Quantity
63 ... 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 glands, e.g. PTC thermistor or anti-condensation heating M16x1.5
or M20x1.5
Other thread sizes are possible as an option.
6.1.3 Minimum air clearances
After proper installation, verify that the minimum air clearances between non-insulated parts
are maintained. Be aware of any protruding wire ends.
Table 6- 2 Minimum air clearance dependent on rms value of the alternating voltage Urms
Rms value of the alternating volt-
age
Urms
Minimum air clearance
Ex d
Ex e
≤ 500 V
6 mm
8 mm
≤ 630 V
10 mm
≤ 1000 V
8 mm
14 mm
Values apply at an
installation altitude of up to 2000 m.
When determining the required minimum air clearance, the voltage value in the table may be in-
creased by a factor of 1.1, so that the rated input voltage range is taken into account during gen-
eral use.
6.1.4 Internal equipotential bonding
The internal equipotential bonding between the grounding terminal in the terminal box, the
terminal box components and the machine enclosure is ensured via metallic contact, a
copper braided strip or a stranded wire.