Marking for use in areas with combustible
- Gas
- Dust
II 3G Ex nA IIB T155°C(T3) Gc X
II 3D Ex tc IIIC T155°C Dc X
Code
Meaning
Symbol Ex
II
Equipment group II which is suitable for all potentially explosive areas other than firedamp-
endangered excavations
3
Equipment category 3, i.e. equipment in this category is intended for use in areas in which an
explosive atmosphere is unlikely to occur due to gases, vapors, mists or dust/air mixtures, but
if it does occur, it is likely to occur only rarely and for a short period of time.
G
G = Gas
D
D = Dust
Ex
The European standard for explosion protection has been applied.
nA
Ignition protection type nA for EPL Gc
tc
Protection by housing for EPL Dc
T 155 °C
Maximum surface temperature inside and outside the housing, where explosive gas or dust
can occur.
(T3)
Temperature class T3 < 200 °C
IIB
Explosion group
IIIC
Explosion group
Gc
Device protection level (EPL) classification Gc for advanced safety level for use in potentially
gas explosive atmospheres where there is no ignition risk during normal operation or have any
additional safety measures which ensure in the event of foreseeable faults/malfunctions no ig-
nition risk exists.
Dc
Device protection level (EPL) classification Dc for advanced safety level for use in potentially
flammable atmospheres where there is no ignition risk during normal operation or have any
additional safety measures which ensure in the event of foreseeable faults/malfunctions no ig-
nition risk exists.
X
For designation "Special Conditions" see notes about test number
1.7.2 UL marking for USA and Canada
UL-label in accordance with UL1004 and CSA 22.2., No. 100.
8/27
Operating instructions
MSK Motors Operation For Potentially
Explosive Areas
Bosch Rexroth AG R911323850_Edition 05
