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Comprehensive Guide to CSA C22.2 No. 213-17 (2018): Non-Incendive Electrical Equipment for Hazardous Locations
Understanding the Requirements for Design, Testing, and Compliance in Canada
CSA C22.2 No. 213-17 (2018) is the Canadian standard for non-incendive electrical equipment intended for use in hazardous (classified) locations. As part of the Canadian Electrical Code, Part II (C22.2 series), this standard provides detailed requirements for the design, construction, testing, and marking of equipment that, under normal operation and certain fault conditions, is incapable of igniting a specific flammable gas, vapor, or dust atmosphere. This article covers the scope, technical requirements, implementation highlights, and compliance notes for engineers, manufacturers, and safety professionals.
Scope
CSA C22.2 No. 213-17 (2018) applies to electrical equipment that is intended for use in hazardous locations where the protection concept of non-incendive (NI) is permitted. The standard covers:
- Hazardous areas: Equipment suitable for Class I, Division 2; Class II, Division 2; Class III, Division 2; and equivalent Zone 2/Zone 22 areas where flammable gases, vapors, or dusts are present under abnormal conditions.
- Protection concept: Non-incendive equipment is designed so that under normal operation and specific fault conditions, any arcing, sparking, or thermal effects are not capable of igniting the surrounding atmosphere.
- Equipment types: This includes motors, lighting fixtures, sensors, control panels, and other electrical apparatus that do not produce incendive sparks or temperatures during normal service.
- Exclusions: The standard does not apply to equipment certified as intrinsically safe (IS), explosion-proof, or other protection concepts unless specifically referenced. It complements CSA C22.2 No. 60079-0 and IEC 60079-0 for general requirements.
Tip: Non-incendive equipment is often compared with intrinsically safe systems. However, non-incendive equipment does not limit energy to the same degree and may contain components that produce higher energy levels under fault conditions. It is essential to verify the specific classification of the area before selecting non-incendive equipment.
Technical Requirements
The standard outlines rigorous technical criteria to ensure that non-incendive equipment does not become a source of ignition. Key requirements include:
Normal Operation and Fault Conditions
Equipment must be designed so that during normal operation (including startup, shutdown, and anticipated adjustments) it does not produce sparks, arcs, or temperatures high enough to ignite the surrounding atmosphere. The standard also considers a limited number of fault conditions (typically one or two) that are not expected to occur during the lifetime of the equipment but are still assessed.
Temperature Classification
Surface temperatures under normal and fault conditions must not exceed the auto-ignition temperature of the specific hazardous atmosphere. The standard defines temperature codes (T1 to T6) as per IEC 60079-0. The equipment must be clearly marked with the appropriate temperature class.
Enclosure and Sealing Requirements
Enclosures are required to meet minimum ingress protection (IP) ratings—typically IP54 or higher—to prevent entry of dust, water, and other contaminants. Sealing requirements for conduit entries and cable glands are specified to maintain the protection integrity.
Component Constraints
Certain components, such as switches, relays, and connectors, must be of a type that does not produce incendive arcs in normal use. Alternatively, they must be encapsulated, sealed, or otherwise protected. The standard references component standards where applicable.
Important: Non-incendive equipment must be evaluated together with its associated wiring and any external circuits that could introduce energy into the equipment. The standard requires consideration of the maximum voltage and current that could appear at the terminals during fault conditions.
Testing and Validation
Manufacturers must perform type tests to demonstrate non-incendive capability. The following table summarizes key test requirements:
| Test Type | Description | Criteria |
|---|---|---|
| Temperature test | Measure surface temperatures under normal and fault conditions | Must not exceed assigned T-class temperature |
| Sparks test | Evaluate any arcing or sparking phenomena during normal operation | No ignition of sample gas mixture |
| Defeat test (fault simulation) | Simulate likely single faults to assess ignition potential | No ignition under specified fault conditions |
| Enclosure integrity test | IP rating verification per IEC 60079-0 | Meet or exceed IP54 (or as specified) |
Good Practice: During design, it is advisable to keep component power dissipation as low as possible and to use sealed contacts or solid-state switching to reduce the risk of arcs. This simplifies testing and increases safety margins.
Implementation Highlights
Applying CSA C22.2 No. 213-17 (2018) in a product development cycle involves several critical steps:
- Hazardous area classification: Determine the specific zone or division and the gas/dust group (e.g., Group IIA, IIB, IIC, IIIA, etc.) to select the appropriate equipment category.
- Design for non-incendive principles: Use circuit analysis to ensure that even under fault conditions the energy available at any sparking contact is below the minimum ignition energy (MIE) of the atmosphere.
- Protection of field wiring: Ensure that non-incendive circuits are separated from other circuits by proper spacing, barriers, or grounding to prevent energy transfer.
- Marking and documentation: Provide permanent marking including the standard number, hazardous location classification, temperature code, and any special conditions for safe use. Include installation instructions in the user manual.
Critical: Misapplication of non-incendive equipment in Division 1 or Zone 0/1 areas is a safety hazard. The standard strictly limits the use to Division 2/Zones 2 and 22. Any attempt to use this equipment in higher-risk areas could lead to explosions and must be avoided.
Compliance Notes
To achieve certification under CSA C22.2 No. 213-17 (2018), manufacturers should work with an accredited certification body (such as CSA Group or Intertek). Key compliance aspects include:
- Third-party evaluation: Most jurisdictions require certification by a recognized organization. Self-declaration may not be accepted.
- Quality management: The standard may be used in conjunction with ISO 9001 or a factory production control (FPC) program to ensure consistent manufacturing.
- Updates and amendments: The 2018 edition includes updates for alignment with the IECEx Scheme and the Canadian Electrical Code Part I. Any deviation from previous editions must be addressed in the design.
- Retesting after modifications: Significant changes to the equipment design may require re-evaluation to maintain non-incendive approval.
For more details, refer to the full standard or consult with a hazardous locations specialist. Non-incendive protection remains a cost-effective and reliable solution for many industrial applications.
Q: What is the difference between non-incendive and intrinsically safe protection?
A: Intrinsically safe (IS) limits energy in all conditions (including faults) so that it is incapable of ignition. Non-incendive (NI) only ensures that under normal operation and specific fault conditions the equipment is not an ignition source. IS is allowed in Zone 0/1, while NI is restricted to Zone 2/22. IS generally requires lower energy levels and more stringent criteria.
A: Intrinsically safe (IS) limits energy in all conditions (including faults) so that it is incapable of ignition. Non-incendive (NI) only ensures that under normal operation and specific fault conditions the equipment is not an ignition source. IS is allowed in Zone 0/1, while NI is restricted to Zone 2/22. IS generally requires lower energy levels and more stringent criteria.
Q: Is CSA C22.2 No. 213-17 (2018) harmonized with international standards?
A: Yes, it aligns with IEC 60079-15 (for equipment protection level (EPL) Gc and Dc) and the IECEx certification system. The standard facilitates acceptance of non-incendive equipment across Canada and in many global markets when used alongside IEC-based area classifications.
A: Yes, it aligns with IEC 60079-15 (for equipment protection level (EPL) Gc and Dc) and the IECEx certification system. The standard facilitates acceptance of non-incendive equipment across Canada and in many global markets when used alongside IEC-based area classifications.
Q: Can non-incendive equipment be repaired or modified in the field?
A: Repairs or modifications should only be performed in accordance with the manufacturer’s instructions and the standard’s requirements. Unauthorized changes may void the non-incendive certification and compromise safety. Always consult the certifying body.
A: Repairs or modifications should only be performed in accordance with the manufacturer’s instructions and the standard’s requirements. Unauthorized changes may void the non-incendive certification and compromise safety. Always consult the certifying body.
Q: What are typical examples of non-incendive equipment?
A: Examples include non-incendive field devices (transmitters, actuators), control panels with sealed relays, and luminaires with protected LED drivers. The equipment must be specifically marked as non-incendive (NI) with the temperature code and division/zone rating.
A: Examples include non-incendive field devices (transmitters, actuators), control panels with sealed relays, and luminaires with protected LED drivers. The equipment must be specifically marked as non-incendive (NI) with the temperature code and division/zone rating.
Last updated: 2026