TYPE OF PROTECTION AND GAS GROUP

TYPE OF PROTECTION

                      ZONE ‘0’         Ex‘s’ (Specifically certified for used in Zone ‘0’).

                      ZONE ‘1’        Any type of protection suitable foe Zone 0 and Ex‘d’, EX ‘b’, Ex‘p’,Ex ‘e’

                      ZONE ‘2’        Any type of protection suitable for Zone 0 or Zone 1 and Ex’N’ or ‘n’ Ex ‘O’, Ex ‘q’

Ex‘d’                          – Flame proof or Explosion proof.

Ex ‘e’                         – Increased safety

Ex’N’ or ‘n’               – Non sparking

Ex ‘I’                         – Intrinsic Safety

Ex ‘p’                        – Pressurization

Ex ‘O’                       – Oil immersion

Ex ‘q’                        – Sand or Power filled

Ex‘s’                          – Special protection.

GAS GROUP

	Representative Gas	IEC	USA
1	Methane	I	D
2	Propane	IIA	D
3	Ethylene	IIB	C
4	Hydrogen	IIC	B
5	Carbon Disulphide	IIC
6	Acetylene	IIC	A