Protection relaxed version of other methods
Application: Zone 2 lights, motors junction boxes etc
Supplementary marking requirements for apparatus producing arcs, sparks or hot surfaces.
Non sparking Ex nA
Restricted breathing Ex nR
Simplified pressurization Ex pz
Energy limiting apparatus Ex nL (i.c.)
Sealed or encapsulated device Ex nC
Enclosed break Ex nC
Hermetically sealed Ex nC
