Electrical connection
Explosion-protected machines
110 56100000002002, 01/2016
6.1.1.2 Protruding connection cables
Risk of short-circuit and voltage hazard
A short circuit can occur if connecting cables are clamped and crushed
between parts of the enclosure and the cover plate.
This can result in death, severe injury and material damage.
• During disassembly and particularly when installing the cover plate,
make sure that the connecting cables are not clamped between
enclosure parts and the cover plate.
Damage to connecting cables that are freely led out
You must observe the following note to avoid damaging connecting cables that are
freely led out:
• It must be ensured that there are no foreign bodies, dirt, or moisture in the
terminal base of the machine enclosure.
• Use O-rings or suitable flat gaskets to seal entries in cover plates (DIN 42925)
and other open entries.
• Seal the terminal base of the machine enclosure using the original seal of the
cover plate to prevent dust and water from entering.
• Please observe the tightening torques for cable glands and other screws.
6.1.1.3 Thread sizes
Table 6-1 Thread sizes in the cast iron terminal box
Type of protection /
Zone
Additional
thread
with mounting
parts
M 25x1.5
M 16x1.5
1
1
- -
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