Code IP55T4,IIC or IP55T3,IIC

Question

Code IP55T4,IIC or IP55T3,IIC

worthyscot (Electrical)

(OP)

8 Nov 10 18:19

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 (Electrical) · Answer 1 · 2010-11-09 10:04:45

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

Good on ya,

Goober Dave

http://files.engineering.com/getfile.aspx?folder=8ce59275-c4de-4bb6-a433-e6

JLSeagull (Electrical) · Answer 2 · 2010-11-09 13:13:29

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.

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Code IP55T4,IIC or IP55T3,IIC