European Safety Systems Ltd.
Impress House, Mansell Road, Acton, London W3 7QH
www.e2s.com
Tel: +44 (0)208 743 8880
Document No. D199-00-501-IS
Issue 4
04-01-21
Sheet 2 of 5
CEC Class / Zone Ratings Canada Codes
Standards
CAN/CSA C22.2 No. 60079-0 (Ed. 4) 02/2019
Explosive Atmospheres - Part 0: Equipment - General
Requirements
CAN/CSA C22.2 No. 60079-1 (Ed. 3) 2016
Electrical Apparatus for Explosive Gas Atmospheres - Part
1: Flameproof Enclosures 'd'
Ratings
STExJ2
Ex db IIC T5 Gb Ta -50°C to +70°C
Ex db IIC T6 Gb Ta -50°C to +65°C
Installation must be carried out in compliance with the
Canadian Electric Code.
NEC & CEC Class / Division Ratings for US / Canada,
USL CNL
Standards
UL1638A (Ed. 1) 2016
Standard for Visual Signal Appliances for General
Signalling Use
CSA C22.2 No. 205-17 (Ed. 3) 2017
Signal Equipment
Ratings
STExJ2
Class I Div 2 Group ABCD T5 Ta -50°C to +70°C
Class I Div 2 Group ABCD T6 Ta -50°C to +65°C
Installation must be carried out in compliance with the National
Electric Code / Canadian Electric Code.
3) Zones, Gas Group, Category and
Temperature Classification
The units can be installed in locations with the following
conditions:
Area Classification
Zone 1
Explosive gas air mixture likely to occur in
normal operation.
Zone 2
Explosive gas air mixture not likely to occur in
normal operation, and if it does, it will only
exist for a short time.
Zone 21
(ATEX / IECEx only)
Explosive dust air mixture likely to occur in
normal operation.
Zone 22
(ATEX / IECEx only)
Explosive dust air mixture not likely to occur
in normal operation, and if it does, it will only
exist for a short time.
Gas Groupings
Group IIA
Propane
Group IIB
Ethylene
Group IIC
Hydrogen and Acetylene
Temperature Classification for Gas Applications
T1
450ºC
T2
300ºC
T3
200ºC
T4
135ºC
T5
100ºC
T6
85ºC
Dust Groupings
(ATEX / IECEx only)
Group IIIA
Combustible Flyings
Group IIIB
Non-conductive Dust
Group IIIC
Conductive Dust
Maximum Surface Temperature for Dust Applications
(ATEX / IECEx only)
STExJ2
80ºC
Equipment Category
2G / 2D
Equipment Level Protection
Gb, Gc, Db, Dc
Ambient Temperature Range
-50°C to +70°C
IP Rating
IP6X to EN/IEC60079-0
IP66 to EN60529
4) Special Conditions of safe use
Repair of the flame path / flameproof joints is not permitted.
Figure 1: Flame Path.
The metallic enclosure has a non-conductive coating. These
may generate an ignition-capable level of electrostatic charges
under certain extreme conditions. The user should ensure that
the equipment is not installed in a location where it may be
subjected to external conditions that might cause a build-up of
electrostatic charges on non-conducting surfaces.
5) Product Mounting and Access
5.1. Location and Mounting
The location of the junction boxs should be made with due
regard to the area over which the warning signal must be
visible. They should only be fixed to services that can carry the
weight of the unit.
The STEx junction boxes should be securely bolted to a flat
surface using 9.0mm diameter bolt holes in the base of the
unit. See figure 2.
