Siemens SIMOTICS XP 1MB1 series - Minimum Air Clearances; Internal Equipotential Bonding; Cable Glands

Electrical connection
6.2 Connecting the machine
1LA5/6/7/9, 1LG4/6, 1MA6/7, 1MB..1/2/3/4/5 - SH 63 ... 355
Operating Instructions, 06/2018, A5E44455710A
75
6.2.1.10
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 U
rms
Rms value of the alternating
voltage
U
rms
Minimum air clearance
mm
Ex tc
Ex tb
Ex nA
Ex ec
Ex e
Ex eb
≤ 250 V 3.0 2.5 5.0
≤ 500 V
3.0
5.0
8.0
≤ 630 V
5.5
5.5
10.0
≤ 1000 V
8.0
8.0
14.0
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 i
n-
creased by a factor of 1.1, so that the rated input voltage range is taken into account during gen-
eral use.
6.2.1.11
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.
6.2.2
Cable glands
Cable glands with (sheet metal) nuts (EN 50262)
①
②
Nut
O ring