Industrial Lighting - THORN Lighting

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Industrial Lighting - THORN Lighting

174

Industrial Lighting

Lighting people and places

www.thornlighting.com.au


Quarantine Power Station, Torrens Island, SA

Hazardous Area

Luminaires

Thorn offers many different types

of Hazardous Area Luminaires.

Use this pictorial summary to

help you find what you need

Zone 1 Fluorescent

176

Ex-EXIT

181

Zone 2 Fluorescent

177

Zone 1 Well Glass

178

Zone 2 Well Glass

179

Zone 2 Floodlight

180

Lighting people and places

175

HAZARDOUS AREA LUMINAIRES INDUSTRIAL


176

Zone 1 Fluorescent

A linear twin lamp fluorescent

luminaire suitable for areas

where hazardous liquid, gases

or vapours is present during

normal operation

Ordering Guide Lamps to be ordered separately.

Lighting people and places

• Central locking system

operated by hex 13mm socket

key

• Electronic ballast provides

high luminous efficiency, lower

energy consumption and

longer service life of the lamps

• Diffuser latched by 20 latch

points, hinged from either side

and act as a lamp support.

• Lamp operation is independent

so that failure of one does not

affect the other

• Automatic disconnect switch

ensures the isolation of all

exposed components when the

fixture is opened

• 4 x M20 Threaded Metal

entries

• Through Wiring

• IIC gas groups

• Exde compliant

Description ILCOS Code Socket Wt (kg) Temp Class SAP Code

ZONE 1 FLUORESCENT 2X18W HF FD G13 4.6 T4 96064661

ZONE 1 FLUORESCENT 2X18W HF E2M FD G13 10.0 T4 96064662

ZONE 1 FLUORESCENT 2X36W HF FD G13 6.7 T4 96061167

ZONE 1 FLUORESCENT 2X36W HF E2M

Accessory

FD G13 12.0 T4 96063568

ZONE 1/2 FLUORESCENT CEILING BRA KIT

HF - High frequency, E2M - 2 hour maintained emergency

96064666

1632

1660

T26 (FD) G13 18-36W

AS/NZS60598

IP66

Class I Electrical

Materials/Finish

Body: glass-mat reinforced

polyester (GRP), grey.

Diffuser: polycarbonate, clear.

Gasket: polyurethane foam.

Cable entry: brass.

Installation/Mounting

Surface mounted with cable

entries at each end (supplied

standard with 4 x M20 threaded

metal entries). Complete with

through wiring facility. Ceiling

mount bracket accessory

available for increased support.

Specification

To specify state:

Twin lamp linear fluorescent

luminaire suitable for Zone 1 T4

hazardous applications.

As Thorn Zone 1 Fluorescent.

Compliances

Australian Standard 2238

Electrical Equipment for

Explosive Atmospheres.

Certificate of Compliance Aus

Ex 3723. Australian Standard

1939 Degrees of Protection of

Electrical Equipment IP66.

IECEx PTB04.0001

120°

Zone 1 Fluorescent

Lamp: 2x 36W T26

150°

Cd/1000lm

200 150°

50

90° 90°

60°

30°

188

46

150

100


30°

130

120°

60°

www.thornlighting.com.au

65


Zone 2 Fluorescent

A linear twin lamp fluorescent

luminaire suitable for areas

where concentration of

flammable gases or combustible

dust are present

Ordering Guide Lamps to be ordered separately.

www.thornlighting.com.au

• Electronic Ballast provides

high luminous efficiency, lower

energy consumption and

longer service life of the lamps

• Emergency operation can be

set for 2 hour duration

• Central locking system

operated by standard SW13

hex socket key enables fixture

to be opened from one point

of housing

• Diffuser hinges from either side

and is also designed to act

as a convenient lamp support

when open to simplify lamp

replacement

• IIC gas group

• Exn compliant

Description ILCOS Code Socket Wt (kg) Temp Class SAP Code

ZONE 2 FLUORESCENT 2X18W HF FD G13 4.0 T4 96064663

ZONE 2 FLUORESCENT 2X18W HF E2M FD G13 6.0 T4 96064664

ZONE 2 FLUORESCENT 2X36W HF FD G13 6.0 T4 96061948

ZONE 2 FLUORESCENT 2X36W HF E2M

Accessory

FD G13 8.0 T4 96064665

ZONE 1/2 FLUORESCENT CEILING BRA KIT

HF - High frequency, E2M - 2 hour maintained emergency

96064666

1632

1660

T26 (FD) G13 18-36W

AS/NZS60598

IP66

Class I Electrical

Materials/Finish

Body: fibreglass reinforced

polyester (GRP), grey.

Diffuser: moulded

polycarbonate, clear.

Gasket: polyurethane foam.

Cable entry: brass.

Installation/Mounting

Surface mounted with through

wiring terminal block at each

end of the fixture internally wired

(4mm²) to facilitate ease of

connection. 4 x M20 threaded

metal entries. Ceiling mount

bracket accessory available for

increased support.

Specification

To specify state:

Twin lamps linear fluorescent

luminaire suitable for Zone 2,

Zone 21 & 22 T4 hazardous

applications.

As Thorn Zone 2 Fluorescent.

Compliances

Australian Standard 2238

Electrical Equipment for

Explosive Atmosphere.

Certificate of Compliance Aus

Ex 3723. Australian Standard

1939 Degrees of Protection of

Electrical Equipment IP66.

120°

188

46

150°

Cd/1000lm

200 150°

65

130

50

90° 90°

60°

30°

Zone 2 Fluorescent

Lamp: 2x18W T26

150

100


30°

120°

60°

Lighting people and places

177

INDUSTRIAL

HAZARDOUS AREA LUMINAIRES


178

Zone 1 Well Glass

A Zone 1 well glass luminaire

with a wide range of reflectors

suitable for IIB or IIC gas group

application

Ordering Guide Lamps to be ordered separately.

Lighting people and places

• Integral gear

• Configured glass reduces

glare improving light

distribution

• Certified for operation in

elevated ambient temperatures

of up to 50°C

• Wide range of light sources to

meet specific lighting needs-

175, 250 & 400W metal

halide (MH); 70, 150, 250W,

400W high pressure sodium

(HPS)

• Complete with wire guard

• Choice of 3 reflectors

• IIB or IIC gas groups

Description

IIB Requirements

ILCOS Code Socket Wt (kg) Temp Class SAP Code

ZONE 1 WELLGLASS B 70W HSE WG - E27 28.0 T6 96064690

ZONE 1 WELLGLASS B 150W HSE WG - E40 28.0 T4 96064691

ZONE 1 WELLGLASS B 250W HSE WG - E40 28.0 T3 96064692

ZONE 1 WELLGLASS B 400W HSE WG - E40 28.0 T3 96064693

ZONE 1 WELLGLASS B 175W HIE WG - E40 28.0 T4 96064694

ZONE 1 WELLGLASS B 250W HIE WG - E40 28.0 T3 96064695

ZONE 1 WELLGLASS B 400W HIE WG

IIC Requirements

- E40 28.0 T3 96064696

ZONE 1 WELLGLASS C 70W HSE WG - E27 30.0 T6 96064697

ZONE 1 WELLGLASS C 150W HSE WG - E40 30.0 T4 96064698

ZONE 1 WELLGLASS C 250W HSE WG - E40 30.0 T3 96064699

ZONE 1 WELLGLASS C 400W HSE WG - E40 30.0 T3 96064700

ZONE 1 WELLGLASS C 175W HIE WG - E40 30.0 T4 96064701

ZONE 1 WELLGLASS C 250W HIE WG - E40 30.0 T3 96064702

ZONE 1 WELLGLASS C 400W HIE WG

Accessories

- E40 30.0 T3 96064703

REFLECTOR 96064704

ANGLE REFLECTOR 96064705

HIGHBAY REFLECTOR 96064706

HSE (SE) E27 70W

HSE (SE) E40 150-400W

HIE (ME) E40 175-400W

AS/NZS 60598

IP66

Class I Electrical

Materials/Finish

Body: grey copper free

aluminium.

Glass: heat and impact resistant,

configurated glass.

Lamp socket: porcelain with

stainless steel screw shell.

Reflectors: dome and angle

fiberglass reinforced polyester

(Krydon ® ); High Bay, Alzak

aluminium.

Installation/Mounting

Various mounting arrangements

available – Ceiling as standard,

wall, stanchion refer ordering

guide.

Specification

To specify state:

A Zone 1 well glass luminaire

available in 70-400 W HPS or

175-400 MH.

As Thorn Zone 1 Well Glass.

Compliances

EN50014, EN50018, EN50019,

EN60529, EN60598

AS/NZS: 60079.0.2000,

AS/NZS: 60079.1.2000,

AS/NZS: 60079.7.2002.

Certificate of Compliance No.

PTB ATEX1056, Aus EX Pending.

Ambient Temperature -50° to 55°C.

Ø430

www.thornlighting.com.au

618


Zone 2 Well Glass

A Zone 2, Zone 21 & 22 well

glass luminaire with a wide

range of accessories to suit

most hazardous applications

Ordering Guide Lamps to be ordered separately.

www.thornlighting.com.au

• Integral gear

• Choice of light source- high

pressure sodium (HPS) or

metal halide

• Operating ambient

temperature between -45°C

and 55°

• Configured glass and

prismatic refractors reduce

glare and improve light

distribution

• Recessed hubs

• Restricted breathing design

gives improved T rating

allowing use of higher lumen

output fixtures

• Complete with wire guard

• High bay version is complete

with reflector & lens

• Choice of 2 reflector options

two body sizes

• IIC gas groups

Description

Small Body

ILCOS Code Socket Wt (kg) Temp Class SAP Code

ZONE 2 WELLGLASS 70W HSE WG - E27 7.0 T5 96064675

ZONE 2 WELLGLASS 150W HSE WG - E40 7.0 T3 96064676

ZONE 2 WELLGLASS 175W HIE WG

Large Body

- E40 7.0 T3 96064677

ZONE 2 WELLGLASS 250W HSE WG - E40 17.0 T3 96064678

ZONE 2 WELLGLASS 400W HSE WG - E40 17.0 T3 96064679

ZONE 2 WELLGLASS 250W HIE WG - E40 17.0 T3 96064680

ZONE 2 WELLGLASS 400W HIE WG

Large Body Highbay

- E40 17.0 T3 96064681

ZONE 2 WELLGLASS 250W HSE WG - E40 20.0 T3 96064682

ZONE 2 WELLGLASS 400W HSE WG - E40 20.0 T3 96064683

ZONE 2 WELLGLASS 250W HIE WG - E40 20.0 T3 96064684

ZONE 2 WELLGLASS 400W HIE WG

Accessories - Small Body

- E40 20.0 T3 96064685

REFLECTOR 96064686

ANGLE REFLECTOR

Accessories - Large Body

96064687

REFLECTOR 96064689

ANGLE REFLECTOR 96064688

HSE (SE) E27 70W

HSE (SE) E40 150-400W

HIE (ME) E40 175-400W

AS/NZS 60598

IP66

Class I Electrical

Materials/Finish

Body: copper free aluminium

painted grey

Wire guard: copper free

aluminium or stainless steel wire

Exterior hardware: stainless steel

Globes: configurated glass

Reflectors: dome or angle white

Krydon ® fiberglass, reinforced

polyester material

High bay: alzak aluminium

reflector; tempered glass lens

Installation/Mounting

Mounted directly into the ceiling.

Accessory simply screw into the

luminaire body.

Specification

To specify state:

A Zone 21 & 22 well glass

luminaire available in two sizes

ranging from 70W- 400W HPS

or 175- 400W MH.

As Thorn Zone 2 Well Glass.

Compliances

AS2380 Electrical equipment for

explosive atmospheres - Non-

Sparking Equipment, & Dust

Excluding Ignition Proof

AS 1939 Degrees of protection

IP66, EN50021:1999,

Certificate of Compliance No.

Ex426, PTB00 ATEX 2215

120°

294

Ø254

150°

Cd/1000lm

175 150°

182

44

90° 90°

60°

30°

Zone 2 Well Glass

Lamp: 1x400W HIE

131

88


30°

120°

60°

355

Lighting people and places

179

INDUSTRIAL

HAZARDOUS AREA LUMINAIRES


180

Zone 2 Floodlight

A Zone 2, Zone 21 & 22

floodlight suitable for industrial

locations

Ordering Guide Lamps to be ordered separately.

Lighting people and places

• Choice of HID light sources

including HPS or MH

• Versatile yoke mounting

bracket simplifies installation

• Door frame is hinged and has

captive fastening screws for

ease of relamping

• Silicone rubber gaskets are

standard, ensuring long life

and reliable environmental

sealing even under adverse

conditions

• IIC gas groups

• Exn and DIP compliant

Description ILCOS Code Socket Wt (kg) Temp Class SAP Code

ZONE 2 FLOOD 70W HST ST E27 15.0 T6 96064667

ZONE 2 FLOOD 150W HST ST E40 15.0 T5 96064668

ZONE 2 FLOOD 250W HST ST E40 15.0 T4 96064669

ZONE 2 FLOOD 400W HST ST E40 15.0 T3 96064670

ZONE 2 FLOOD 175W HIT MT E40 15.0 T4 96064671

ZONE 2 FLOOD 250W HIT MT E40 15.0 T4 96064672

ZONE 2 FLOOD 400W HIT

Accessory

MT E40 15.0 T3 96064673

60MM POST TOP SPIGOT 96064674

660

175

65

HST (SE) E27 70W

HST (ST) E40 150-400W

HIT-CE (MT)E40 175-400W

AS/NZS 60598

IP66

Class I Electrical

Materials/Finish

Body: die casting aluminium,

grey finish

Lens: tempered heat and impact

resistant glass

Gasket: extruded silicone

Exterior hardware: stainless steel

Installation/Mounting

Supplied complete with

yoke mounting bracket for

surface mounting. Slipfitter

adaptor available for 2” Pole

top mounting please order

separately.

Specification

To specify state:

A Zone 2, Zone 21 & 22

industrial floodlight suitable

for most outdoor hazardous

locations.

As thorn Zone 2 floodlight.

Compliances

Certificate Aus 08.3056

530

120°

150°

Cd/1000lm

250 150°

63

90° 90°

60°

30°

Zone 2 Floodlight

Lamp: 1x400 HSE

430

120


450

188

125

30°

120°

60°

www.thornlighting.com.au

390


Ex-EXIT

A Zone 1 LED escape sign suitable

for marking escape routes and

exits in potentially explosive areas

Ordering Guide Supplied complete with LEDs lamp.

Description Wt (kg) Temp Class SAP Code

EX-EXIT 6W PR 2.0 T6 96064707

EX-EXIT 6W PL 2.0 T6 96064708

EX-EXIT 6W PU 2.0 T6 96064709

PR - pictogram right, PL - pictogram left, PU - pictogram up

www.thornlighting.com.au

• Suitable for areas with

potentially explosive gas

atmospheres (Zones 1and 2)

and potentially explosive dust

atmospheres (Zones 21 and 22)

• Maintenance-free operation,

as the LEDs do not need

replacing throughout the

complete service life of the

luminaire (50,000 hours)

• Robust polycarbonate

enclosure

• Suitable for Indoor or Outdoor

installations

• Suitable for a wide input

voltage range from 110 V to

277 V AC and 250 V DC

• 25 metre visibility range

• Energy efficient, 6W in total

Materials/Finish

Housing: polycarbonate

Diffuser: polycarbonate

Cable entry: moulded plastic

Installation/Mounting

Wall mounting by means of

external fixing lugs. Hinged

frame for ease of electrical

connection. 1 x Ex e cable entry

M20 x 1.5 (moulded plastic)

and 1 x Ex e blanking plug

M20 x 1.5.

Specification

To specify state:

An LED explosion-protected

escape sign suitable for Zone

1, Zone 2, Zone 21 & 22 for

indoor and outdoor hazardous

locations.

As Thorn Ex-Exit.

Compliances

ATEX Directive 94/9/EC and

EN 60598, Part 2.22 for

emergency lighting luminaires.

31

LED 6W

AS/NZS 60598 Class I Electrical

IP66

365

340

150 134

324

351

340

324

75

110

82

Lighting people and places

181

INDUSTRIAL

HAZARDOUS AREA LUMINAIRES


182

Hazardous Area Application Guide

Hazardous area luminaires are used

for a wide range of applications

Areas are defined as hazardous

where a danger of explosion exists

owing to the presence, or partial

presence of a potentially explosive

atmosphere resulting from the

processes or activity undertaken in

the immediate or surrounding area.

An explosive atmosphere occurs

as a result of a mixture of

inflammable materials (such as

gas, vapours or dust) with air in

sufficient proportions as to be

able to cause an explosion when

ignited by excessive temperature,

electrical arc, spark or other

ignition source.

Some lighting applications liable to

be classed as hazardous areas are:

• cleaning product industries

• pharmaceutical industries

• distilleries

• paint and varnish manufacturers

• oil refineries

Luminaires in hazardous

areas

In order to select the correct

luminaire for use in a particular

hazardous atmosphere the

following information is necessary:

• The classification of the

hazardous area (i.e. Zone 0,

Zone 1 or Zone 2)

• The ignition temperature of the

gas, vapour, solid or dust

(i.e. ‘T’ class)

• The gas group

• Other environmental issues

should also be studied such

as the equipment ingress

protection required plus

any possible chemical or

mechanical attack to the

luminaire integrity.

Lighting people and places

Hazardous area

classification

The European code of practice

EN60079 calls for all potentially

explosive areas to be classified

according to the probability of a

flammable atmosphere occurring

in order that the appropriate type

of protected electrical equipment

is installed. The code of practice

gives specific guidance as

to which type of protected

equipment may be installed in

which zones.

Area classification is only

intended to assist in the selection

of electrical equipment – it is

not concerned with the toxic risk

which may be associated with the

flammable materials, or with the

possible exposure of personnel to

the vapours.

Zone 0 (gases)

Zone 20 (dusts)

Where an explosive mixture is

continuously present or present

for long periods (typically 1,000

hours or more per year).

Zone 1 (gases)

Zone 21 (dusts)

Where an explosive mixture

is present in normal operation

(typically between 10 and 1,000

hours per year).

Zone 2 (gases)

Zone 22 (dusts)

Where an explosive air mixture

is present in abnormal conditions

only for short periods (typically

less than 10 hours per year).

Temperature classification

The temperature classification of a given gas is the temperature

above which an appropriate mixture of that gas with air. It is critical

that the maximum surface temperature of any equipment which may

come into contact with the gas/air does not exceed the ignition

temperature of the mixture.

The temperature class of ‘T Rating’ is normally based on temperature

of -20ºC to +40ºC.

Class

T Rating

T1 450

T2 300

T3 200

T4 135

T5 100

T6 85

Surface Temperature o C

Max. permitted

Gas Groups

The explosive gases, vapours and mists present in the atmosphere

are classified or grouped into temperature classes and gas groups

according to various properties such as ignition temperature, the

energy required to ignite the mixture, the energy produced by an

explosion, flame transmission capability etc.

Under CENELEC EN50014 and IEC79-12 standards explosive

gas/air mixtures are placed in the following groups:

IEC

Group

Representative

Gas

I Methane (underground mining)

IIA Propane

IIB Ethylene

IIC Acetylene

Types of protection

There are established engineering concepts recognised by the

IEC for the design of electrical equipment for hazardous area

applications. These engineering concepts are the basis of protection

against the risk of fire or explosion.

Each concept is identified by a protection symbol. The prefix ‘Ex’ in

the symbol denotes a national standard.

Symbol Summary Zone Use Standards

Ex ‘d’ Electrical apparatus for explosive gas

atmospheres Flameproof enclosed ‘d’

1 & 2 IEC 60079-1

Ex ‘p’ Electrical apparatus for explosive gas

atmospheres Pressurised apparatus ‘p’

Ex ‘q’ Electrical apparatus for explosive gas

atmospheres Powder filled ‘q’

Ex ‘e’ Electrical apparatus for explosive gas

atmospheres Increased safety ‘e’

Ex ‘i’ Electrical apparatus for explosive gas

atmospheres Intrinsic safety ‘i’

Ex ‘n’ Electrical apparatus for explosive gas

atmospheres Non sparking ‘n’

Ex ‘m’ Electrical apparatus for explosive gas

atmospheres Encapsulation ‘m’

DIP Electrical apparatus for use in the presence of

combustible dust

Electrical apparatus protected by enclosures

1 & 2 IEC 60079-2

1 &2 IEC 60079-5

1 &2 IEC 60079-7

0, 1 & 2 IEC 60079-11

2 IEC 60079-15

1 & 2 IEC 60079-18

2 IEC 61241-1

www.thornlighting.com.au


Compound Temp class Gas group Compound Temp class Gas group

acetaldehyde T4 IIA ethane T1 IIA

acetic acid T1 IIA ethanol T2 IIA

acetone T1 IIA ethanolamine - IIA

acetylacetone T2 IIA ethoxyethanol T3 IIB

acetyl chloride T2 IIA ethyl acetate T1 IIA

acetylene T2 IIC ethyl acrylate - IIB

acrylonitrile T1 IIB ethylbenzene T2 IIA

allyl chloride T1 IIA ethyldigol - IIA

allylene - IIA ethylene T2 IIB

ammonia T1 IIA ethylene oxide T2 IIB

amphetamine - IIA ethyl formate T2 IIA

amyl acetate T2 IIA ethyl mercaptan T3 IIA

amyl methyl ketone - IIA ethyl methyl ether T4 IIB

aniline T1 IIA ethyl methyl ketone T1 IIA

benzene T1 IIA formaldehyde T2 IIB

benzaldehyde T4 IIA formdimethylamide T2 IIA

benzyl chloride T1 IIA hexane T3 IIA

blue water gas T1 IIC hexanol - IIA

bromobutane T3 IIA heptane T3 IIA

bromoethane T1 IIA hydrogen T1 IIC

butadiene T2 IIB hydrogen sulphide T3 IIB

butane T2 IIA isopropyinitrate T4 IIB

butanol T2 IIA jet fuels T3 IIA

butene T2 IIB kerosene T3 IIA

butyl acetate T2 IIB methaldehyde - IIA

butyraldehyde T3 IIA methane (firedamp) T1 IIA

carbon disulphide T5 IIC methane (industrial) T1 IIA

carbon monoxide T1 IIB methanol T1 IIA

chlordimethyl ether - IIA methoxyethanol T3 IIB

chlorobenzene T1 IIA methyl acetate T1 IIA

chlorobutane (T1) IIA methyl acetoacetate T3 IIA

chloroethane T1 IIA methyl acrylate - IIB

chloroethanol T2 IIA methylamine T2 IIA

chloroethylene T1 IIA methylcycohexane T3 IIA

chloromethane T1 IIA methylcycohexanol T3 IIA

chloropropane T1 IIA methyl formate T1 IIA

coal tar naphtha T3 IIA naphtha T3 IIA

coke oven gas - IIB naphtalene T1 IIA

cresol T1 IIA nitrobenzene T1 IIA

cyclobutane - IIA nitroeyhane T2 IIB

cyclohexane T3 IIA nitromethane T2 IIA

cyclohexanol T2 IIA nitropropane T2 IIB

cyclohexaneone T2 IIA nonane T3 IIA

cyclohexene (T2) IIA nonanol - IIA

cyclohexylamine T3 IIA octaidehyde - IIA

cyclopropane T1 IIB octanol - IIA

decahydronaphthalene T3 IIA paraformaldehyde T2 IIB

diacetone alcohol T1 IIA paraldhyde T3 IIA

diaminoethane T2 IIA pentane T3 IIA

diamyl ether T4 IIA pentanol T2 IIA

dibutyl ether T4 IIB petroleum T3 IIA

dichlorobenzene (T1) IIA phenol T1 IIA

dichloroethane T2 IIA propane T1 IIA

dichloroethylene (T2) IIA propanol T2 IIA

dichloropropane T1 IIA propylamine (T2) IIA

diesel fuel T3 IIA propylene (T1) IIA

diethylamine (T1) IIA propyl methyl ketone T1 IIA

diethylaminoethanol - IIA pyridine T1 IIA

diethyl ether T4 IIB styrene T1 IIA

diethyl oxalate - IIA tetrahydrofuran (T3) IIB

diethyl sulphate - IIA tetrahydrofurfuryl alcohol T3 IIB

dihexyl ether - IIA toluene T1 IIA

di-isobutylene (T2) IIA toluidine T1 IIA

dimethylamine (T2) IIA toluol T1 IIA

dimethylaniline T2 IIA triethylamine - IIA

dimethyl ether - IIB trimrthylamine (T4) IIA

dipropyl ether - IIB trimethylbenzene T1 IIA

dioxane T2 IIB trioxane T2 IIB

dioxolane - IIB turpentine T3 IIA

epoxyypropane T2 IIB xylene T1 IIA

Electrical equipment certified for use in Group II is suitable for use in IIA, IIB and IIC.

Equipment certified for Group IIC is suitable for IIB and IIA whilst equipment certified for IIB is suitable for IIA.

www.thornlighting.com.au

Lighting people and places

183

INDUSTRIAL

HAZARDOUS AREA LUMINAIRES

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