Killark Full Catalog

I NTRODUCT I ON HAZARDOUS LOCATION DATA

North American Use of Equipment marked For Class/Division or Zones

Both the NEC and CE Code permit the use of Class/Division marked equipment to be used in Zone Locations and Zone marked equipment to be used in Class/Division locations. The CE Code includes Table 18 whereas the NEC currently has this information in text. (The 2023 NEC Edition is expected to add a similar table to that used in the CE Code)

CLASS/DIVISION SYSTEM

ZONE SYSTEM

AREA CLASSIFICATION

AREA CLASSIFICATION

SUITABLE EQUIPMENT

SUITABLE EQUIPMENT

CLASS I, GASSES AND VAPORS

EXPLOSIVE GAS ATMOSPHERES

Intrinsically safe, Encapsulation

IS, I.S., Exi, Exia,

ma j

Zone 0

Flameproof

da jk EPL Ga

Equipment marked

Equipment suitable for use in Zone 0 Equipment marked Class I, Division 1 Purged equipment to NFPA 496

Types X, Y

Equipment marked Class I, Division 1 Purged equipment to NFPA 496

Intrinsic safety Encapsulation

ib

Types X, Y

ma, mb

Intrinsic safety Encapsulation

IS, I.S., Exi, Exia

Flameproof

d. db

Class I, Division 1

ma j da k

Intrinsic safety Increased safety

i, ib

Flameproof

e, eb

Inherently safe optical radiation Optical system with interlock

op is, with EPL Gb** op sh, with EPL Gb**

Zone 1

Pressurized enclosure

p, px, pxb, py, pyb

Powder filling

q, qb

Liquid immersion o, ob Electrical resistance trace heating 60079-30-1, EPL Gb Inherently safe optical radiation op is, with EPL Gb** Optical system with interlock op sh, with EPL Gb** Protected optical radiation op pr, with EPL Gb** Equipment marked EPL Ga or Gb

Equipment suitable for use in Zone 0 Equipment suitable for use in Zone 1

Equipment suitable for use in Class I, Division 1 Equipment suitable for use in Zone 0 Equipment suitable for use in in Zone 1 Equipment to NFPA 496

Equipment suitable for use in Class I, Division 1 Equipment suitable for use in Class I, Division Equipment to NFPA 496

Type Z

Type Z

Type of Protection “n” (Group II)

nA, nC, nL, nR

Type of Protection “n” (Group II)

nA, nC, nL, nR

Intrinsic safety Encapsulation

ic

Intrinsic safety Encapsulation

ic

mc

mc

Flameproof

dc

Flameproof

dc

Intrinsic safety Increased safety

ic

Intrinsic safety Increased safety

ic

ec

Class I, Division 2

Zone 2

ec

Pressurized enclosure

pz, pzc

Pressurized enclosure

pz, pzc

Liquid immersion oc Electrical resistance trace heating 60079-30-1, EPL Gc Skin effect trace heating with EPL Gc** Impedance heating with EPL Gc** Inherently safe optical radiation op is, with EPL Gc** Optical system with interlock op sh, with EPL Gc* Protected optical radiation op pr, with EPL Gc** Equipment marked EPL Ga, Gb or Gc Other electrical apparatus‡

Liquid immersion oc Electrical resistance trace heating 60079-30-1, EPL Gc Skin effect trace heating with EPL Gc** Impedance heating with EPL Gc** Inherently safe optical radiation op is, with EPL Gc** Optical system with interlock op sh, with EPL Gc* Protected optical radiation op pr, with EPL Gc** Equipment marked EPL Ga, Gb or Gc Other electrical apparatus‡

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