APPLICATION DATA
PRODUCTS FOR HAZARDOUS LOCATIONS
Product Safety Code of Practice 014E
Revision date 2011/09/29
C.E.C. Code Changes
In 1998, the Canadian Electrical Code (C.E.C.) adopted the International Electrotechnical
Commission’s (I.E.C) ”Three Zone Area” Classification System for Class 1 hazardous locations.
The Zone System is an alternate classification for Class 1 hazardous locations and is intended to
promote harmonization with international standards.
Hazardous location - classes
The Class defines the general nature of hazardous material in the surrounding atmosphere.
Class I – Gas and vapour environments
Class II – Dust environment
Class III – Fibers and flying environments
The Division defines the probability of hazardous material being present in an ignitable
concentration in surrounding atmosphere.
The Groups defines the hazardous material in the surrounding atmosphere
The C.E.C. revision 1998 affects only the Class I – gas and vapour environments
Area classification - Divisions versus Zones
Continuous Hazard
Intermittent Hazard
Hazard under abnormal conditions
Zone 0
Zone 1
Zone 2
Division 1
Division 2
Comparison between Gas groups designation and
1998 CEC & IEC gas groups
Typical Gas Hazard
Division Gas Groups
1998 CEC & IEC Gas Groups
Acetylene
A
Hydrogen
B
Ethylene
C
IIB
Propane
D
IIA
IIC
NOTE: the old Division based system is applicable to existing installations and the new
Zone system applicable to new installations. It’s obvious that the dual system will coexist
for a while and may be referenced in old and new client/consultant specifications.
Understanding and indentifying the hazardous environment and material and
configure/select the proper product is the most important action to validate and provide
the requested records as support.
5.0 APPLICATION LIMITATIONS
5.1 General limitations
5.1.1 These products are designed and approved to handle primarily waste water or similar
aqueous solutions in locations classified as hazardous. They are not intended for use in
hazardous processes or for deliberately and continuously handling relatively high concentrations
of flammable liquids. (i.e. where API approved products are required)
5.1.2 The maximum allowable liquid temperature for Class 1 Zone 1/Division 1or Zone
2/Division 2 is maximum 40º C for submerged products.
5.1.3 Repairs of “Ex” products must be made by ITT W&WW Canada or by a facility approved
for hazardous location repairs (i.e. Qualified Facility).
5.1.4 Level sensing in hazardous locations environment: when liquid level sensors ENM-10 or
other KPSI are used in Division 1 or 2 hazardous locations, they must be operated at intrinsically
safe current levels by provision of intrinsically safe relays in the control panel. At request
guidelines can be provided by Technical Department for use of our safe packs kits.
5.1.5 Chemical compatibility: in applications where the pumped or mixed media contain traces
of flammable liquids or chemicals, there is a risk of dangerous deterioration of rubber or plastic
components such as power cables, cable entry seals, “O”rings and level sensors. The
compatibility of these components to the media must be checked by using PSCOP 010 and Crest
software.
5.2 Class 1 Division 1 limitations
5.2.1 Division 1 explosion proof approvals are only valid when internal heat sensors installed on
these products are connected to a control circuit to initiate motor shut-down.
5.2.2 Division 1 certified products may have only one cable entry, therefore star delta starting is
not possible and products must be equipped with one single “composite” (combined power and
monitoring) cable of type SOW/SOOW/W/SHD-GC/G-GC. For larger sizes, when composite
cables are not available, one single type SOW or W power cable and one type SOW monitoring
cable may be used.
5.3 Class 1 Division 2 limitations
5.3.1 The following optional Flygt monitoring devices have been approved as non-incendive by
CSA and may be installed inside products approved for Class 1 Div.2 applications:
 Float leakage sensor (FLS) PN 518 89 01/02
 Float switch PN 482 62 00
 Temperature sensor PT-100
 Stator temperature switched 125ºC, 140ºC, 155ºC