Killark Full Catalog

I NTRODUCT I ON HAZARDOUS LOCATION DATA

COMPARISON OF THE TYPICAL DEGREES OF PROTECTION PROVIDED BY UL 50/CSA C22.2 NO. 94 ENCLOSURES

TYPE OF ENCLOSURE 1* 2* 4 4X 5 6 6P 12 12K 13 X X X X X X X X X X X X X X X X X X X X — X X X X X X X X X — — X X — X X X X X — — X X X X X X X X — — X X — X X — — — — — — — — — — X X X — — — — — — — — — X — — — X — — X — — — — — — — — X X — — — — — — — — — X — — —

PROVIDES A DEGREE OF PROTECTION AGAINST THE FOLLOWING CONDITIONS

Access to hazardous parts

Ingress of solid foreign objects (falling dirt)

Ingress of water (Dripping and light splashing)

Ingress of solid foreign objects (Circulating dust, lint, fibers, and flyings**)

Ingress of solid foreign objects (Settling airborne dust, lint, fibers, and flyings**)

Ingress of water (Hosedown and splashing water)

Oil and coolant seepage

Oil or coolant spraying and splashing

Corrosive agents

Ingress of water (Occasional temporary submersion Ingress of water (Occasional prolonged submersion)

* For additional information refer to www.nema.org

DEGREES OF PROTECTION PROVIDED BY NEMA 7, 8, 9 AND 10 FOR INDOOR HAZARDOUS LOCATIONS For outdoor locations, these will require additional approval to the applicable UL 50/CSA C22.2 No. 94 Standards PROVIDES A DEGREE OF PROTECTION AGAINST ATMOSPHERES TYPICALLY CONTAINING ENCLOSURE TYPES 7 AND 8, CLASS I GROUPS** ENCLOSURE TYPE 9, CLASS II GROUPS (See NFPA 497M for Complete Listing) CLASS A B C D E F G 10 Acetylene I X — — — — — — — Hydrogen, manufactured gas I — X — — — — — — Diethyl ether, ethylene, cyclopropane I — — X — — — — — Gasoline, hexane, butane, naphtha, propane, acetone, toluene, isoprene I — — — X — — — — Metal dust II — — — — X — — — Carbon black, coal dust, coke dust II — — — — — X — — Flour, starch, grain dust II — — — — — — X — Fibers, flyings* III — — — — — — X — Methane with or without coal dust MSHA — — — — — — — X * For Class III locations, see the requirements NEC and CE Code. * The enclosures must also be suitable for the specific area classification in terms of Class, Division and Temperature Code.

NEMA Definitions for Hazardous Location Enclosures (not identified in UL 50/CSA C22.2 No. 94) NEMA type enclosures occasionally appear in

NEMA 8 Enclosures Intended indoor or outdoor use in locations classified as Class I, Groups A, B, C, or D, as defined in the NEC. NEMA 9 Enclosures Intended for indoor use in locations classified as Class II, Groups E, F, and G, as defined in the NEC. NEMA 10 Enclosures Are constructed to meet the applicable requirements of the Mine Safety and Health Administration (MSHA).

specifications or on product literature and are specific to the US only. These enclosure Types are not identified in the UL 50/CSA C22.2 No. 94 Standard. The following is a reference from NEMA type to Class Designation. NEMA 7 Enclosures Intended for indoor use in locations classified as Class I, Groups A, B, C, or D, as defined in the NEC.

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