What to Use Where

Designation	Protection Method	Zone 0	Zone 1	Zone 2
EExia	Intrinsic Safety	a	a	a
EExib	Intrinsic Safety	r	a	a
EExd	Flameproof	r	a	a
EExp	Pressurization	r	a	a
EExe	Increased Safety	r	a	a
EExm	Encapsulation	r	a	a
EExo	Oil Immersion	r	a	a
EExq	Powder Filling	r	a	a
EExn	Non-Incendive	r	r	a

		r	= Do Not Use
		a	= Acceptable