Ex： Electrical equipment markings for explosion-proof gas environments
ib： The protection type isIntrinsic safetytype
I： Coal mine gas environment
Mb： Equipment protection level, can be used in Zone 1
Ex： Electrical equipment markings for explosion-proof gas environments
db： The protection type isExplosion prooftype
eb： The protection type is increased safety type
IIC: IIC Gas and Vapor Environment
T6：Temperature groupFor T6, the maximum surface temperature of the equipment shall not exceed 85 ° C
Gb： Equipment protection level, can be used in Zone 1/Zone 2
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