Code IP55T4,IIC or IP55T3,IIC

[worthyscot]

The protect Class (Anti explosion Class) is IP55T4, IIC. Or IP55T3, IIC, It is FENC find from technical safety documents.
This is a project I'm working on I know the T3 and T4 are for temperature and IIC is for class but the IP55 I need help with some documentation to spec controls.

 

[DRWeig]

IP55 is generally a physical protection rating according to IEC 529. See attached.


Good on ya,

Goober Dave

 

[JLSeagull]

Currently the standard is IEC 60529 for Ingress Protection.

Within the USA perhaps one could call IIC a material zone group. See NFPA 497 table 4.4.2 for the cross reference between groups A, B, C, D etc. with the zone groups IIC, IIB, and IIA. Flammable and combustible liquids include Class Identification with Roman numberals much like those above but none of the liquid classes that I see include IIC. This gets more confusing. Pick ethanol and find that it is NEC group D, type I and zone IIA. The type and Class I zone groups include Roman numerals. The notes indicate that type designates whether the ematerial is a gas, flammable liquid or combustible liquid. The Class I Zone groups in this table are based upon 1996 IEC TR3 60079-20.