ATEX Coding

To meet the exacting requirements of ATEX directive 2014/34/EU, Peli Lights are tested to ensure that they pose no threat of ignition when operating within hazardous locations. Using approved laboratories, the lights are tested to ensure that they will withstand rigorous impact and drop tests, severe environmental exposure and meet a minimum of IP54 water and dust ingress protection. Longevity and safety are assured by design. Lights with gas approvals do not require impact test and gas approval only requires IPX4 (gas approval does not require dust test IP5X. Dust approval requires IP6X dust test).

Each light certified by ATEX should have a code printed on its body. This code advises the user as to the zone in which it can be safely used without risk of explosion.

peli atex lighting marking gas dust zones

ATEX Marking for Mining

I M1 Ex ia I Ma
I Equipment Group Approved for mining
MI
MII		 Equipment Category and Environment 2 levels of protection/2 independent faults
1 level of protection/based on normal operation
Ex Specific Marking Explosion protection
ia/ib Type of protection Intrinisic safety level of the device in Zone 0/1
I * Gas Group Methane
Ma/Mb Equipment Protection Level High, safe with 2 faults/high, safe with 1 fault

ATEX Marking for Gas

II 1G Ex ia IIC T4 Ga
I
II		 Equipment Group Approved for mining
No mining
1G
2G
3G		 Equipment Category and Environment Category 1, use in Zone 0/1/2
Category 2, use in Zone 1/2
Category 3, use in Zone 2
Ex Specific Marking Explosion protection
ia/ib/ic Type of protection Intrinisic safety level of the device in Zone 0/1/2
IIA
IIB
IIC		 * Gas Group i.e. Propane
i.e. Ethylene
i.e. Hydrogen
T1/T2/T3
T4/T5/T6		 * Temperature Class Maximum surface temperature of 450°C/300°C/200°C
Maximum surface temperature of 135°C/100°C/85°C
Ga/Gb/Gc Equipment Protection Level High, safe with 2 faults/high, safe with 1 fault

ATEX Marking for Dust

II 1D Ex ia IIIC T130°C Da
I
II		 Equipment Group Approved for mining
No mining
1G
2G
3G		 Equipment Category and Environment Category 1, use in Zone 20/21/22
Category 2, use in Zone 21/22
Category 3, use in Zone 22
Ex Specific Marking Explosion protection
ia/ib/ic Type of protection Intrinisic safety level of the device in Zone 0/1/2
IIA
IIB
IIC		 * Dust Group i.e. Flammable Fibres
i.e. Non conductive dust
i.e. Conductive dust
T * Temperature Class Maximum surface temperature level is to be indicated
Da/Db/Dc Equipment Protection Level High, safe with 2 faults/high, safe with 1 fault

* Temperature Class

Temperature Class Ignition Temperature Examples
T1 ≥ 450 °C Propane, lighting gas, hydrogen
T2 ≥ 300 °C Ethyl alcohol, Ethylene, Acetylene
T3 ≥ 200 °C Fuel
T4 ≥ 135 °C Acetaldehyde
T5 ≥ 100 °C Hydroxylamine
T6 ≥ 85 °C Carbon disulfide

- The Auto-Ignition Temperature is the temperature, in C at which a gas will ignite spontaneously without another source of ignition

- Because there is NO correlation between Ignition Energy and Ignition Temperature for the gas groupings, a temperature code was established

- The Temperature Class is based on use in an ambient temperature of -20/40 C. If the ambient temperature differes from that range, it needs to be shown.

* Gas Group

Gas Group Minimum Ignition Energy Selection of Equipment
I 200 µJ For mines susceptible to methane
IIA
IIB
IIC		 180 µJ+
60 - 180 µJ
20 - 60 µJ		 Atmospheres containing propane/butane/oil/ammonia

Atmosphere containing ethylene/ether

Atmosphere containing hydrogen/acetylene

- Gases are divided into two groups based on the LEL and UEL values.

* Dust Group

Dust Group Substance Selection of Equipment Examples
IIIA Flammable fibers > 0,5mm Explosive surface > 1000 hrs/yr Wood shaving
IIIB Non-conductive dust with electrical resistivity > 103 Ωm Explosive surface between 10 and 1000 hrs/yr Saw dust, flour
IIIC Conductive dust with electrical resistivity ≤ 103 Ωm Explosive surface between 10 and 10 hrs/yr Metal dust

- Dust areas are defined as group III and refers to equipment intended for use in spaces with an explosive dust atmosphere other than mines susceptible to firedamp.

Maximum Surface Temperature

Group III electrical equipment is marked with a temperature with ‘T’ prefix detailing the actual maximum temperature that may be found on any surface accessible by a potentially explosive dust atmosphere. Ignition temperature of a specific dust hazard must be higher than maximum surface temperature displayed on electrical equipment.

Ignition Temperatures for Common Combustible Dusts

Dust Type Dust Group Dust Layer (5mm)
Minimum Ignition Temperature (°C) 		Dust Cloud (5mm)
Minimum Ignition Temperature (°C)
Aluminum IIIC 450 560
Blasting Dust (Paint Shreds) IIIB 270 390
Coal IIIB 380 560
Flour (Wheat) IIIB 450 430
Grain IIIA 290 490
Iron Powder IIIC 450 520
Paper Fibre IIIA 335 470
PVC IIIB 440 680
Resin (Epoxy) IIIB 240 532
Rubber IIIB 450 470
Soot IIIB 450 720
Starch (Maize) IIIB 490 430
Sugar IIIB 460 360
Wood (Flour) IIIB 305 470

EC/EU Type Examination Certificate Number

TRAC 13 ATEX 0009 X
Notified body responsible for EC/EU-Type Examination Year Issued ATEX Certificate Serial Number Number Suffix

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