1

Hazloc Certification Acronyms

Certification by an impartial third-party or certification agency is an attestation that relevant safety and performance standards have been met. The certification process, no matter how complex, cannot be avoided and is a requirement for manufacturers wanting their electrical products to be approved for use. This is especially true for equipment (known as Ex-equipment), intended for use in hazardous areas (Hazloc)/ and explosive atmospheres.
There are many definitions and complex requirements involved in a certification process for a global Hazloc certification. To be successful in your certification process, you need to know many of the terms in use. To help you, Hazcon has prepared a list of many of the commonly used acronyms and their meaning.

We encourage everyone to suggest additional words and expressions that need to be added. We welcome your feedback. You can also reach us at info@hazcon.com.

AEx Symbolizes that a product is built to U.S. ANSI Standards; the Ex means the product is built to IEC Standards, which are acceptable in the USA; Ex is the equivalent IEC reference in Canada.
AFCI Arc-Fault Circuit Interrupter
AHJ Authority Having Jurisdiction
AIT Auto-ignition temperature – the minimum temperature  at which an explosive mixture ignites due to heat alone.  Also called the ignition temperature.
ANSI American National Standards Institute
API American Petroleum Institute
ASD Adjustable Speed Drives
ASME American Society of Mechanical Engineers
ASSE An ANSI-accredited Standards developer and product certification body
ASTM American Society for Testing Materials
ATEX A European Regulatory Framework for the manufacture and sale of explosion-protected equipment, for the E.U.
ATEX Directive ATEX derives its name from the French title of the 2014/34/EU Directive: Appareils destinés à être utilisés en ATmosphères EXplosives.
AWG American Wire Gage
BSI British Standards Institute
CE Mark Mandatory European marking for certain product groups to indicate conformity with health and safety requirements of European Directives
CEC Canadian Electric Code
CENELEC European Committee for Electrotechnical Standardization: a European Standards and certification body:
https://ec.europa.eu/growth/single-market/european-standards/harmonised-standards_en
CML Certification Management Limited, an approval agency and a recognized “Notified body” in Europe
CL I Stands for Class I. Refers to a North American classification of hazardous materials which are flammable and/or combustible liquids, gasses, or vapours.
CL II Stands for Class II. Refers to a North American classification of explosive materials which are combustible dusts.
CL III Stands for Class III. Refers to a North American classification of explosive materials which are ignitable fibers or combustible flyings such as grain dust, cotton, rayon, etc.
C of C Certificate of Compliance
CSA Canadian Standards Association, an International approval agency for North America. Also, a recognized NRTL for North America. CSA Certified Product Listing: https://www.csagroup.org/testing-certification/product-listing/
DIP Dust Ignition-Proof
Da Equipment Protection Level for use in explosive dust atmospheres, provided a very high level of protection and therefore not a source of ignition in normal operation, expected or rare malfunctions
Db Equipment Protection Level for use in dust gas atmospheres, provided a high level of protection and therefore not a source of ignition in normal operation or expected malfunctions
Dc Equipment Protection Level for use in explosive dust atmospheres, provided an enhanced level of protection and therefore not a source of ignition in normal operation
Div 1 Stands for Division 1, a North America classification in which an explosive atmosphere exists under normal operating conditions, frequently due to repair/maintenance activities or leakage and mechanical failure or abnormal operation
Div 2 Stands for Division 2, a North American classification in which an explosive atmosphere exists under equipment failure or abnormal operation (an area adjacent to a Division 1 location)
EMT Electrical Metallic Tubing
EN Stands for Euronom, the name given to Standards developed by CENELEC
EPL Equipment Protection Level – the level of protection that is given to equipment based on the likelihood of its becoming a source of ignition. This marking also distinguishes the difference between explosive gas atmospheres, explosive dust atmospheres, and the explosive atmospheres in mines susceptible to firedamp.
EPR Ethylene Propylene Rubber
Ex This symbol denotes equipment for explosive atmospheres. This explosion protection symbol applies to zone systems.
Ex d The “d” means a protection approach that involves a flameproof enclosure:  an enclosure that can withstand an internal explosion of a flammable mixture which has penetrated its interior without suffering damage and without causing ignition.
Ex e This protection technique involves increased safety for electrical equipment to reduce the probability of excessive temperatures and the occurrence of arcs or sparks.
Ex i The “I” in this protection approach refers to intrinsic safety. A type of protection in which, under normal or abnormal conditions, the electrical equipment is incapable of releasing sufficient electrical or thermal energy to cause ignition of the flammable or combustible mixture.
Ex m This protection technique involves encapsulation (may also be called “potting”):  components which could potentially ignite an explosive atmosphere by releasing electrical or thermal energy are enclosed in a compound  (resin) to prevent ignition and prevent any spark from coming in contact with the hazardous substance.
Ex n This type of protection involves the configuration of electrical equipment in such a way that it is incapable of igniting the surrounding atmosphere under normal operating conditions, and so that faults capable of causing ignition are not likely to occur.
Ex o The “o” refers to a type of protection involving oil, often used in power equipment.  The electrical equipment is immersed in this protective liquid to prevent ignition of any explosive atmosphere above the liquid or outside the enclosure. The oil also controls the surface temperature to a safe level.
Ex p The “p” in this prevention technique means a pressurized and or purged enclosure: a type of protection for electrical equipment that prevents the entrance of an explosive atmosphere into the enclosure by keeping it filled with a protective non-explosive gas at a higher pressure than that of the external atmosphere. Purging involves maintaining a flow of air or inert gas sufficient to dilute the concentration of the hazardous substance.
Ex q This type of protection refers to a powder-filled (glass or quartz) enclosure.  Components that could potentially ignite an explosive atmosphere are fixed in place and surrounded by a filling such as glass or quartz powder so that ignition is prevented.
Ex t A type of protection in which the electrical equipment is equipped with an enclosure that keeps dust out of the source of ignition inside the equipment
ExCB IECEx Certification Body
ExMC IECEx Management Committee
ExTAG ExTAG Decision Sheet Contains a list of decisions covering Ex Testing and Ex Certification under the IECEx System.
https://www.iecex.com/publications/extag-decision-sheets/
ExTL IECEx Ex Test Laboratory
ExTR IECEx Test Report
EXP Flameproof or Explosionproof
FM Factory Mutual, an International approval agency for North America. Also, a recognized NRTL for North America.
Ga Equipment Protection Level for use in explosive gas atmospheres, provided a very high level of protection and therefore not a source of ignition in normal operation, expected or rare malfunctions; it is safe even if two malfunctions or faults occur independently from each other.
Gb Equipment Protection Level for use in explosive gas atmospheres, provided a high level of protection and therefore not a source of ignition in normal operation or expected malfunctions.
Gc Equipment Protection Level for use in explosive gas atmospheres, provided an enhanced level of protection and therefore not a source of ignition in normal operation.
GFCI Ground-Fault Circuit Interrupter
HLA Hazardous Location Area
HAC Hazardous Area Classification
HAZLOC Hazardous Location; Hazloc equipment means hazardous location equipment.
IAPMO International Association of Plumbing and Mechanical Officials
IAS International Accreditation Service
IIA Gas group containing propane or other gases of equivalent hazard and characteristics
IIIA Dust group containing combustible flyings, including fibers, and others of equivalent hazard and characteristics
IIB Gas group containing ethylene or other gases of equivalent hazard and characteristics
IIIB Dust group containing combustible dust other than metal ducts and others of equivalent hazard and characteristics
IIC Gas group containing Acetylene and Hydrogen or other gases of equivalent hazard and characteristics
IIIC Dust group containing combustible metal dust and other solid particle combustible dust of equivalent hazard and characteristics
IEC International Electrotechnical Commission  a not-for-profit organization founded in 1906, which prepares and publishes international Standards for electrical, electronic and related technologies
IECEx International Electrotechnical Commission System for Certification to Standards relating to Equipment for use in Explosive Atmospheres.
https://www.iecex-certs.com
IECEE IEC Conformity Assessment for Electrotechnical Equipment and Components
IECQ IEC Quality Assessment System for Electronic Components
IECRE IEC Certification of Equipment for Use in Renewable Energy Applications
IECEx Certificate of Compliance   Certification by an IECEx Scheme Member, known as a certification body (CB). An attestation that relevant safety and performance standards have been met.
https://www.iecex-certs.com/
IMC Intermediate Metal Conduit
IP Ingress Protection – the environmental protection of a device
IP Institute of Petroleum
IS Intrinsically Safe
ITC-H Instrumentation Tray Cable for Hazardous Locations
LEL Lower Explosive Limit
MC-HL Metal-Clad Cable for Hazardous Locations
MESG Maximum experimental safe gap
MI Mineral-Insulated
MIC Minimum Igniting Current
MIE Minimum Ignition Energy
NEC National Electric Code, North America
NEMA National Electrical Manufacturers Association
NFPA National Fire Protection Association
NI Non-incendive, a type of protection in which the equipment is incapable under normal conditions of causing ignition of a specified flammable gas or vapour-in-air mixture due to arcing or thermal effect
NIST/NVLAP National Institute of Standards and Technology
NRTL Nationally Recognized Testing Laboratory
NSF An American product testing, inspection and certification organization
OEM Original Equipment Manufacturer
OSHA Occupational Safety and Health Administration
PLTC Power-Limited Tray Cable
QAN Quality Assurance Notification- quality assurance for manufacturers of hazardous area equipment. It is a mandatory requirement for ATEX equipment manufacturers to have a Quality Assurance Notification for Category 1 and Category 2 products.
QAR Quality Assessment Report – quality assurance for manufacturers of hazardous area equipment. It is a mandatory requirement for IECEx equipment manufacturers to have a Quality Assurance Report in order to get IECEx CofC.
https://www.iecex-certs.com/
QPS North America product testing, inspection and certification organization. A recognized NRTL for North America.
RMC Rigid Metal Conduit
RMS Root-Mean-Square
SCC Standards Council of Canada
SPD Surge-Protective Devices
TC Tray Cable
T Code Temperature Code (also called Temperature Class) – the maximum surface temperature that a given product will not exceed under a specified ambient temperature. For example, a T code of T2 means that its surface temperature will not exceed 300°C, provided it is operated in the ambient temperature indicated by the manufacturer. Used for international certification.
T1 Temperature code of 450°C (842°F)
T2 Temperature code of 300°C (572°F)
T2A Temperature code of 280°C (536°F)
T2B Temperature code of 260°C (500°F)
T2C Temperature code of 230°C (500°F)
T2D Temperature code of 215°C (419°F)
T3 Temperature code of 200°C (392°F)
T3A Temperature code of 180°C (356°F)
T3B Temperature code of 165°C (329°F)
T3C Temperature code of 160°C (320°F)
T4 Temperature code of 135°C (275°F)
T4A Temperature code of 120°C (248°F)
T5 Temperature code of 100°C (212°F)
T6 Temperature code of 85°C (185°F)
UEL Upper Explosive Limit
UL Underwriters Laboratories, an international product testing, inspection and certification organization. https://iq.ulprospector.com/info/
VFD Variable Frequency Drives
XLPE Crosslinked Polyethylene
XP Explosion Proof; may also be used to represent flameproof

7 Comments

  1. Chris Dodds on May 13, 2020 at 12:54 pm

    Thanks, this is a useful resource which I’ve book-marked. Can we subscribe to your Blog? Appreciate your support and the expertise you provide to the explosive atmosphere industries.

    • hazcon on May 13, 2020 at 3:59 pm

      Thank you so much Chris for your kind words and also interested in our blog. We will be happy to have you as a subscriber to our website. We appreciate it your comments and feedback. Hazcon Inc.

  2. Cheng Yong on May 13, 2020 at 3:38 pm

    It’s very good! One comment, above ATI should be AIT。I aslo try to collect below Acronyms, hope useful.
    ABS: American Bureau of Shipping
    ANSI: American National Standards Institute
    ASTM: American Society for Testing Materials
    AFCI: Arc-Fault Circuit Interrupter
    AWG: American Wire Gage
    API: American Petroleum Institute
    ASD: Adjustable Speed Drives
    BSI: British Standards Institute
    EMT: Electrical Metallic Tubing
    EPR: Ethylene propylene rubber
    GFCI:Ground-Fault Circuit Interrupter
    IMC: Intermediate metal conduit
    ITC-HL, Instrumentation tray cable for hazardous locations
    IP: Institute of Petroleum
    MC-HL: Metal-clad cable for hazardous locations
    MC-HL: Metal-clad cable for hazardous locations
    MI, Mineral-insulated, Metal-sheathed
    MIC: Minimum igniting current
    MIE: Minimum Ignition Energy
    PLTC: Power-limited tray cable
    RMS: root-mean-square
    RMC: Rigid metal conduit
    SPD:Surge-Protective Devices
    TEFC:Totally enclosed fan cooled
    TC: Tray cable
    THD: Total harmonic distortion
    VFD: Variable Frequency Drives
    XLPE: Crosslinked polyethylene

    • hazcon on May 14, 2020 at 1:17 am

      Thanks Cheng for your comment and providing additional Acronyms. We updated the list per your inputs. Thank you again.

  3. Scott Kiddle on May 14, 2020 at 3:14 pm

    Very nice! Only comment is regarding IECEx since you noted ExCB and could note ExTL and ExTR along with ExTAG and ExMC. Another helpful item may be useful hyperlinks, such as: Europa for EU (Blue Guide, Directives and Official Journal), IECEx site for CoC and QAR, CSA and UL site for product listings

    • Hazcon on May 15, 2020 at 1:54 pm

      Thanks Scott for your comment and excellent idea. We added your suggested words with their hyperlinks. Thanks again.

Leave a Comment





Request a Consultation

Complete the form below to get started.

    Recent Posts

    19

    Interchangeable Installations of Class/division vs Zone System-certified Products in Gas Explosive Hazardous Locations

    18

    Update to CSA Standard No. 30: 2020 (Class I, Division 1)

    17

    Can the Temperature Code of an Electrical Device exceed the AIT of the representative gas in a hazardous location?

    16

    Certifying “Ex” Products for Use in the UK (UKCA mark)

    15

    Understanding the Differences Between the Protection Technique Known as” Explosionproof” or “Flameproof “

    14

    Preventing Gas Explosions