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CSA C22.2 No. 92-15: Drip-Proof, Splash-Proof, and Watertight Enclosures for Electrical Equipment – A Technical Overview
Understanding the Requirements, Testing, and Compliance for Moisture-Resistant Enclosures in Canadian Electrical Installations
Scope and Purpose of CSA C22.2 No. 92-15
CSA C22.2 No. 92-15, “Drip‑proof, splash‑proof, and watertight enclosures for electrical equipment”, is a Canadian national standard developed under the Canadian Electrical Code (CE Code) framework. Its primary purpose is to define construction, performance, and testing requirements for enclosures that protect electrical equipment against the ingress of water in the form of dripping, splashing, or temporary immersion.
This standard applies to enclosures intended for non‑hazardous locations where moisture is present—either from condensation, rain, hose‑down cleaning, or submersion due to flooding. It covers both metallic and non‑metallic enclosures and those incorporating viewing windows. The standard does not apply to enclosures for hazardous locations, which are covered by other CSA standards (e.g., CSA C22.2 No. 30 or No. 157).
Enclosures designed in accordance with CSA C22.2 No. 92-15 are assigned type designations that indicate their degree of protection. These types parallel the NEMA 250 system but have specific adaptations to Canadian climatic and installation practices. The standard is widely referenced by electrical inspectors, manufacturers, and engineers when specifying outdoor, wash‑down, or wet‑location enclosures.
Tip: CSA C22.2 No. 92-15 is harmonized with NEMA 250 in many respects; however, provincial variations in the adoption of the Canadian Electrical Code may affect which enclosure types are required. Always verify with the local authority having jurisdiction (AHJ).
Technical Requirements and Enclosure Types
Construction and Material Provisions
The standard specifies minimum material thicknesses for sheet metal enclosures (e.g., steel, stainless steel, aluminum) and wall thicknesses for non‑metallic enclosures (e.g., PVC, polycarbonate, polyester fiberglass). For corrosion‑resistant types (e.g., Type 4X), the standard mandates that all exposed surfaces must resist deterioration from moisture and common industrial chemicals. Gaskets, when required, must be made of material that remains resilient under temperature extremes, and gasket compression must be maintained by the design of the lid or door.
Enclosures with viewing windows must use a material that will not crack or discolor under simulated sunlight (UV exposure) and must meet impact strength requirements when tested in accordance with the standard. All hardware (hinges, latches, bolts) must be corrosion‑resistant or protected against rusting.
Enclosure Type Designations and Testing
Each type defined in CSA C22.2 No. 92-15 must pass specific water‑ingress tests. The following table summarises the major types and their protective features:
| CSA Type | Degree of Protection (Water) | Typical Application | Equivalent NEMA 250 |
|---|---|---|---|
| Type 2 | Drip‑proof (falling water at 15° from vertical) | Indoor, areas with condensation or dripping water | NEMA 2 |
| Type 3 | Rain‑tight, dust‑tight, sleet‑ and ice‑resistant | Outdoor mounting (vertical surface) | NEMA 3 |
| Type 3R | Rain‑proof (no dust test required) | Outdoor, where dust is not a concern | NEMA 3R |
| Type 4 | Water‑tight (hose‑down), dust‑tight | Wash‑down areas, outdoor equipment | NEMA 4 |
| Type 4X | Same as Type 4 plus corrosion‑resistant | Chemical plants, food processing, marine | NEMA 4X |
| Type 6 | Submersible (temporary immersion to 1 m depth) | Flood‑prone areas, docks | NEMA 6 |
| Type 6P | Submersible (prolonged immersion, depth specified) | Manholes, pits, submersible equipment | NEMA 6P |
Testing procedures include:
- Drip test: Water is dripped onto the enclosure from above at a controlled rate while it is rotated; no water may enter the interior.
- Rain test: A water spray nozzle simulates rainfall at 65 L/min for 30 minutes from various angles.
- Hose‑down test: A 1‑in (25 mm) nozzle delivers 260 L/min at approximately 35 psi for 15 minutes.
- Submersion test: Enclosure is immersed in water at a depth of 1 m (or specified depth for Type 6P) for 30 minutes; internal dryness is verified.
- Corrosion test (Type 4X): Enclosure samples are subjected to a 200‑hour salt‑spray test per ASTM B117.
Caution: The submersion test for Type 6 and Type 6P does not guarantee water‑tightness under dynamic pressure conditions (e.g., moving water) unless explicitly tested. For moving‑water submersions, consult the manufacturer.
Implementation Highlights for Designers and Installers
When specifying enclosures to CSA C22.2 No. 92-15, several practical points must be considered:
Gland Plates and Conduit Entry
The enclosure must be supplied with an installation instruction that specifies approved hub sizes, gasketed entry plates, or sealing fittings. Simply using a Type 4 enclosure with non‑gasketed conduit entries will void the rating. The standard requires that all penetrations maintain the integrity of the enclosure’s seal.
Non‑Metallic vs. Metallic
Non‑metallic enclosures offer inherent corrosion resistance but must be evaluated for UV stability, flammability (per CSA C22.2 No. 0.17), and low‑temperature impact. Metallic enclosures (steel, stainless steel, aluminum) are tested for rust resistance; zinc‑galvanized steel is common for Type 4, while Type 4X typically uses stainless steel 304/316 or fiberglass.
Marking
The standard requires that each enclosure be permanently marked with the type designation (e.g., TYPE 4), the manufacturer’s name or trademark, the CSA certification mark, and the maximum ambient temperature if less than the standard 40 °C. Markings must be legible after the environmental tests.
Good practice: For installations where the enclosure is subject to extreme cold (−40 °C or lower), ensure the gasket material and door‑latch mechanism remain functional. Manufacturers can verify compliance with the cold‑impact and low‑temperature sealing tests required by the standard.
Compliance and Certification Notes
Compliance with CSA C22.2 No. 92-15 is typically demonstrated through third‑party certification by an accredited organization such as CSA Group, UL (under the mutual recognition agreement), or Intertek (ETL). The certification process involves factory inspections, periodic follow‑up audits, and testing of representative samples.
Key points for compliance:
- Field modifications: Drilling holes, adding cut‑outs, or substituting hardware may invalidate the listing unless performed in accordance with manufacturer’s instructions that maintain the enclosure’s seal.
- Provincial adoption: Most Canadian provinces have adopted the Canadian Electrical Code (CSA C22.1) which mandates that enclosures used in certain damp or wet locations must meet a specific CSA standard. For example, Section 22 of the CE Code requires outdoor terminations to be weatherproof, which is often interpreted as conforming to Type 3R or 4.
- Combined hazards: If the enclosure is to be installed in a hazardous location, additional requirements from CSA C22.2 No. 30 or No. 157 supersede those of No. 92‑15.
Important: CSA C22.2 No. 92-15 does not address protection against internal explosions or flammability of internal arcing. For enclosures used in combustible dust environments, refer to CSA C22.2 No. 60079‑0 and No. 60079‑31.
Frequently Asked Questions
Q: What is the difference between CSA C22.2 No. 92 and CSA C22.2 No. 94?
A: CSA C22.2 No. 92 covers enclosures that protect against water ingress (drip‑proof, splash‑proof, watertight, submersible). CSA C22.2 No. 94 covers enclosures for non‑environmental applications (indoor use) such as Type 1, 5, 12, and 13. Both are complementary: one deals with moisture protection, the other with dust and oil exclusion without moisture protection.
A: CSA C22.2 No. 92 covers enclosures that protect against water ingress (drip‑proof, splash‑proof, watertight, submersible). CSA C22.2 No. 94 covers enclosures for non‑environmental applications (indoor use) such as Type 1, 5, 12, and 13. Both are complementary: one deals with moisture protection, the other with dust and oil exclusion without moisture protection.
Q: Does CSA C22.2 No. 92-15 include IP rating equivalencies?
A: The standard itself does not include an IP code conversion table, but many manufacturers cross‑reference. For example, a Type 4 enclosure typically meets IP66 (dust‑tight and protected against powerful water jets) or higher, but users should verify with the manufacturer’s test data.
A: The standard itself does not include an IP code conversion table, but many manufacturers cross‑reference. For example, a Type 4 enclosure typically meets IP66 (dust‑tight and protected against powerful water jets) or higher, but users should verify with the manufacturer’s test data.
Q: Can a Type 3R enclosure be used in a wash‑down area?
A: No. Type 3R is only rain‑proof and cannot withstand the high‑pressure hose‑down required in sanitary wash‑down environments. Use Type 4 or 4X for such applications.
A: No. Type 3R is only rain‑proof and cannot withstand the high‑pressure hose‑down required in sanitary wash‑down environments. Use Type 4 or 4X for such applications.
Q: How often is the standard updated?
A: CSA C22.2 No. 92 is maintained by the CSA technical committee on industrial control equipment. The current edition is 2015. Revisions are typically published every five to ten years to align with changes in technology and the Canadian Electrical Code.
A: CSA C22.2 No. 92 is maintained by the CSA technical committee on industrial control equipment. The current edition is 2015. Revisions are typically published every five to ten years to align with changes in technology and the Canadian Electrical Code.
Article prepared for informational purposes. Always refer to the latest edition of CSA C22.2 No. 92-15 and the Canadian Electrical Code for official requirements. © 2026