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CSA C22.2 No. 23.1-M1986 (2017): Technical Requirements for Portable Outlet Boxes
A Comprehensive Guide to the Canadian Standard for Construction, Performance, and Safety Compliance
CSA C22.2 No. 23.1-M1986 (2017) is a longstanding safety standard developed by the Canadian Standards Association (CSA Group) under the C22.2 series of standards. This standard specifically addresses the construction, performance, and marking requirements for Portable Outlet Boxes intended for use in non-hazardous locations in accordance with the Canadian Electrical Code, Part I. Reaffirmed in 2017, this standard remains the definitive benchmark for this product category.
Scope and Classification
This standard applies to complete portable outlet boxes, which incorporate enclosures with factory-wired attachment plug receptacles, switches, and other control devices, as well as enclosures intended to be assembled with such components. These boxes are designed for connection to a branch circuit by means of an attachment plug cap and flexible cord. The standard covers devices rated up to 600 V, typically used in industrial, commercial, and residential applications for temporary power and extension of convenience outlets.
Key classifications include:
- Type 1: Indoor use only, non-weatherproof.
- Type 2: Outdoor/Damp location use, incorporating weatherproof covers and gaskets.
- Types based on material: Metallic (steel, aluminum) and Non-Metallic (polycarbonate, PVC).
Classification Insight: When selecting a box for a jobsite, verify the environmental classification. Standard indoor boxes must not be exposed to rain or moisture, while outdoor rated boxes must pass specific water spray and corrosion tests as per the standard.
Technical Requirements and Construction
The standard outlines rigorous requirements to ensure mechanical strength and electrical safety. The enclosure must provide adequate protection for internal components. Below is a summary of critical technical parameters:
| Parameter | Specification per CSA C22.2 No. 23.1 |
|---|---|
| Rated Voltage | 125 VAC, 250 VAC, up to 600 VAC |
| Rated Current | 15 A, 20 A |
| Minimum Box Volume | 18 in³ (single gang), 30 in³ (two gang) |
| Strain Relief Pull Force | 20 lbs (15 A cord) / 30 lbs (20 A cord) |
| Grounding Continuity | Mandatory for metal boxes (< 0.1 ohm) |
| Temperature Rise | Max 30°C rise above ambient at rated load |
| Dielectric Withstand | 1000 V + 2x Rated Voltage for 60 seconds |
Material Specifications
Metallic Enclosures: Must be steel (minimum 0.032 in thickness) or other metals with equivalent strength. All exposed metal must be corrosion-resistant or suitably coated post-fabrication. The grounding terminal or bonding arrangement must securely connect the non-current-carrying metal parts to the equipment grounding conductor.
Non-Metallic Enclosures: Must be made of material suitable for the intended operating temperature (typically -40°C to +60°C). They must pass an impact test at elevated and low temperatures and must not support combustion. The material is tested against deformation from heat.
Internal Wiring and Capacity
A critical safety aspect is adequate wiring space. The standard specifies minimum box volumes to prevent the overheating of conductors and to allow proper wire bending without insulation damage. The required volume is a function of the number and size of conductors, clamps, and devices within the box.
Critical Compliance Warning: Overfilling a portable outlet box beyond its marked capacity is a direct violation of both the product standard and the Canadian Electrical Code. This practice can lead to excessive heat buildup, short circuits, and fire hazards. Always calculate conductor fill volumes accurately.
Testing and Certification Processes
Products claiming compliance with CSA C22.2 No. 23.1 must undergo rigorous type testing by an accredited certification body (e.g., CSA Group, UL/Underwriters Laboratories of Canada).
- Strain Relief Test: The flexible cord must withstand a direct pull test for 1 minute without the cord moving more than 1/16 inch or disengaging from its termination.
- Dielectric Voltage-Withstand Test: Ensures the insulation of the box and internal wiring can withstand high voltage without breakdown.
- Normal Temperature Rise Test: The box is operated at its rated current until thermal equilibrium is reached to ensure components do not overheat.
- Mechanical Tests: Includes crushing tests, impact tests (using a 6.8 kg steel ball dropped from a specified height), and cover retention tests for weatherproof types.
Certification Assurance: A CSA mark or recognized certification mark on a portable outlet box provides assurance that the product has successfully met the comprehensive safety criteria defined in CSA C22.2 No. 23.1-M1986 (2017). Specifiers should mandate this certification in procurement documents.
Compliance and Field Application Notes
Adherence to this standard is mandated by regulatory authorities in all Canadian provinces and territories through the adoption of the Canadian Electrical Code, Part I.
Installation Caution: Portable outlet boxes are intended for surface mounting or free-standing use on a floor or workbench. They must not be installed recessed within a wall, ceiling, or floor cavity. Furthermore, boxes rated for 125 V are not permitted on 250 V circuits unless specifically listed for the higher voltage.
Marking requirements per Clause 6 of the standard include the manufacturer’s name or trademark, catalogue number, electrical ratings (volts and amperes), number of poles and wires (e.g., 2P+E), and environmental type rating (e.g., Outdoor). All markings must be durable and legible.
Maintenance in the field involves checking the integrity of the strain relief, verifying that the cover is not cracked or damaged, and ensuring the receptacles maintain a good grip on the inserted plug blades. Damaged boxes must be removed from service immediately.
Frequently Asked Questions (FAQs)
Q: What does the “R2017” designation mean in the context of the 1986 standard?
A: “R2017” indicates that CSA C22.2 No. 23.1-M1986 was reviewed and Reaffirmed in 2017. A reaffirmation confirms that the technical requirements of the standard are still relevant and valid for current technology and regulatory needs. No technical changes were introduced in the reaffirmation, but it ensures the document remains current within the CSA portfolio and is recognized by regulators.
A: “R2017” indicates that CSA C22.2 No. 23.1-M1986 was reviewed and Reaffirmed in 2017. A reaffirmation confirms that the technical requirements of the standard are still relevant and valid for current technology and regulatory needs. No technical changes were introduced in the reaffirmation, but it ensures the document remains current within the CSA portfolio and is recognized by regulators.
Q: How does CSA C22.2 No. 23.1 relate to the Canadian Electrical Code (CSA C22.1)?
A: CSA C22.1 (The CE Code) is the overarching installation code. It provides the rules for installing electrical equipment. CSA C22.2 No. 23.1 is a companion product standard. The CE Code rules (e.g., Section 4, Rule 4-006) mandate that equipment must be approved to a specific CSA standard. Portable outlet boxes must meet CSA C22.2 No. 23.1 to be approved for installation under the CE Code.
A: CSA C22.1 (The CE Code) is the overarching installation code. It provides the rules for installing electrical equipment. CSA C22.2 No. 23.1 is a companion product standard. The CE Code rules (e.g., Section 4, Rule 4-006) mandate that equipment must be approved to a specific CSA standard. Portable outlet boxes must meet CSA C22.2 No. 23.1 to be approved for installation under the CE Code.
Q: Are there separate requirements for GFCI (Ground Fault Circuit Interrupter) protection built into portable outlet boxes?
A: Yes. If the portable outlet box incorporates a GFCI device, that device must also comply with the relevant GFCI standard, specifically CSA C22.2 No. 144 (Ground Fault Circuit Interrupters). The overall portable outlet box assembly is evaluated under No. 23.1, which addresses the routing of internal wiring and the compatibility of the enclosure with the GFCI module.
A: Yes. If the portable outlet box incorporates a GFCI device, that device must also comply with the relevant GFCI standard, specifically CSA C22.2 No. 144 (Ground Fault Circuit Interrupters). The overall portable outlet box assembly is evaluated under No. 23.1, which addresses the routing of internal wiring and the compatibility of the enclosure with the GFCI module.
Q: What are the main differences between metallic and non-metallic portable outlet boxes regarding this standard?
A: Metallic boxes must provide a reliable means of equipment grounding and are evaluated for corrosion resistance. Non-metallic boxes must meet stringent flammability and impact resistance tests. Non-metallic boxes are generally lighter and inherently insulate the user from the electrical system, whereas metal boxes provide robust physical protection but require a secure bond to the grounding conductor.
A: Metallic boxes must provide a reliable means of equipment grounding and are evaluated for corrosion resistance. Non-metallic boxes must meet stringent flammability and impact resistance tests. Non-metallic boxes are generally lighter and inherently insulate the user from the electrical system, whereas metal boxes provide robust physical protection but require a secure bond to the grounding conductor.
This article provides a technical overview of CSA C22.2 No. 23.1-M1986 (2017) for professional reference. For detailed design, testing, or compliance activities, engineers and technicians should consult the full text of the standard published by CSA Group. This document reflects the regulatory and engineering landscape as of 2026.