In North America, classifications of hazardous locations have been developed differently compared to Europe. The classification in USA is stated in NEC article 500-516. The rules in Canada and Mexico are principally the same as in USA, minor variations exist.
NEC classifies hazardous locations in Class I, Class II and Class III, Division 1 and 2 and in sub-categories A-G. This is the most common classification even if IEC classification is allowed since 1996, NEC article 505. Note that the definitions in NEC article 505 and IEC are not identical.
Eaton Crouse Hinds Series is our main supplier. The product line consists of enclosures, sealing fittings, junction boxes, components, panelboards, lighting, plugs and receptacles. Eaton Cutler-Hammer supplies a line of pushbuttons suitable for Class 1 Div 2 locations.
Federal Signal manufactures a wide line of audio signals and warning lights for installation in hazardous locations.