class 1 div 2 motorclass 1 div 1 emergency lightclass 1 div 2 distance requirementsclass 1 div 2 electrical enclosuresclass 1 div 2 electrical requirementsclass 1 div 2 led lightingclass i div ii enclosureclass ii div 1 lightingnema class 1 div 2class 1 div 2 junction boxclass 1 division 1 explosion proofnema 4x enclosure class 1 div 2