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CSA C22.2 No. 745-2-31-95 (2018): Safety Requirements for Hand-Held Circular Saws
Technical Overview of the Canadian Standard for Hand-Held Motor-Operated Electric Tools – Part 2-31
Scope and Application
CSA C22.2 No. 745-2-31-95 (2018) is part of the C22.2 No. 745 series that adopts the IEC 60745 family of standards for the safety of hand-held motor-operated electric tools. This particular part applies to hand-held circular saws. The standard specifies safety requirements to protect operators from mechanical, electrical, and thermal hazards during normal use and foreseeable misuse. It covers saws intended for cutting wood, plastics, and similar materials, including those with a blade diameter not exceeding 235 mm (9.25 in). The 2018 reaffirmation confirms the technical content of the 1995 edition remains current; no substantive changes were introduced.
This standard is referenced by the Canadian Electrical Code Part II and is mandatory for product certification in Canada. It aligns closely with IEC 60745-2-31 but includes specific Canadian deviations related to supply voltage ranges, marking, and cord requirements. Compliance with this standard is typically verified through testing by accredited certification bodies such as CSA Group.
Note for manufacturers: Even if your product already complies with the international IEC 60745-2-31 standard, you must review the Canadian national differences listed in CSA C22.2 No. 745-2-31-95 (2018) to ensure full market access in Canada.
Technical Requirements and Test Conditions
The standard outlines comprehensive technical requirements covering electrical, mechanical, and thermal aspects. Key provisions include protection against electric shock, mechanical hazards, abnormal operation, and fire. Below is a summary of critical technical parameters.
| Requirement | Specification | Test Condition |
|---|---|---|
| Lower guard (telescoping or pivoting) | Must automatically return to closed position after cut; opening for workpiece must be minimized. | Manual operation test, 5000 cycles |
| Upper guard (fixed) | Must enclose blade above the base plate; permanent deformation not allowed. | Steady force of 100 N applied for 30 s |
| Blade braking time | From cut-off to full stop ≤ 10 seconds (for saws with brake), or coasting time with supplementary guard. | Test at rated voltage, no load |
| Insulation resistance | ≥ 5 MΩ measured after damp heat and withstand tests. | 500 V DC min, applied for 60 s |
| Dielectric strength | No breakdown during application of 2960 V / 1500 V (depending on basic/supplementary insulation). | 1.25 X rated voltage + 750 V, 50/60 Hz, 1 s |
| Handle temperature rise | Max 50 K (handle surface) under rated load. | Continuous operation until stabilization |
The standard also requires that saws be equipped with a protective guard for the upper part of the blade and a lower guard that automatically covers the blade when not cutting. Lower guard testing includes 5000 cycles of operation to ensure reliability. Braking systems (mechanical or electrical) must stop the blade within 10 seconds; if no brake is provided, the saw must have a special guard design that prevents contact with the coasting blade.
Important: CSA C22.2 No. 745-2-31-95 (2018) does not apply to battery-operated (cordless) circular saws. Cordless products are covered under the newer CSA C22.2 No. 62841 series. Always confirm the applicable standard for your product platform.
Implementation and Compliance in Canada
To sell hand-held circular saws in Canada, manufacturers must have their products certified to this standard. Certification typically involves:
- Submission of product samples and technical documentation to a recognized certification body (e.g., CSA, Intertek, UL).
- Full testing to all clauses of CSA C22.2 No. 745-2-31-95 (2018), including the national differences.
- Factory inspections and ongoing surveillance testing to maintain the certification mark.
One common deviation from IEC 60745-2-31 is the requirement for greater minimum cross-sectional area of power supply cords and specific marking for voltage (nominal 120 V AC in Canada). Additionally, the standard references CSA C22.2 No. 0 for general safety requirements, which includes additional criteria for accessibility of live parts and grounding continuity. Compliance with the Canadian Electrical Code Part I may also be required for components.
Positive aspect: The 2018 reaffirmation of this standard provides long-term stability for manufacturers. Products designed to the 1995 edition remain acceptable, avoiding costly redesigns while ensuring a high level of safety.
For state-of-the-art tools with advanced features like electronic clutches or laser guides, manufacturers should verify that the standard’s requirements are not compromised. Where new technology is not explicitly addressed, alternative testing approaches (e.g., risk assessment per ISO 12100) may be accepted by certification bodies on a case-by-case basis.
Critical: Non-compliant products may be subject to removal from the Canadian market under provincial electrical safety regulations. Always obtain third-party certification before distribution.
Frequently Asked Questions
Q: What is the main difference between CSA C22.2 No. 745-2-31-95 (2018) and IEC 60745-2-31?
A: The CSA version is essentially identical to IEC 60745-2-31 but includes Canadian national differences such as supply voltage 120 V (instead of 230 V), stricter cord requirements, and reference to CSA C22.2 No. 0. The 2018 reaffirmation does not introduce new differences; it merely confirms the continued validity of the 1995 edition.
A: The CSA version is essentially identical to IEC 60745-2-31 but includes Canadian national differences such as supply voltage 120 V (instead of 230 V), stricter cord requirements, and reference to CSA C22.2 No. 0. The 2018 reaffirmation does not introduce new differences; it merely confirms the continued validity of the 1995 edition.
Q: Are there requirements for blade braking time?
A: Yes. For saws with a braking device, the blade must stop within 10 seconds after the switch is released. Saws without a brake must incorporate a guard that effectively prevents contact with the coasting blade. The braking test is conducted at rated voltage under no-load conditions.
A: Yes. For saws with a braking device, the blade must stop within 10 seconds after the switch is released. Saws without a brake must incorporate a guard that effectively prevents contact with the coasting blade. The braking test is conducted at rated voltage under no-load conditions.
Q: Does this standard apply to cordless circular saws?
A: No. Battery-operated hand-held tools are covered under CSA C22.2 No. 62841-2-5 (adopting IEC 62841-2-5). Manufacturers of cordless saws should reference the appropriate 62841 series standard for safety requirements.
A: No. Battery-operated hand-held tools are covered under CSA C22.2 No. 62841-2-5 (adopting IEC 62841-2-5). Manufacturers of cordless saws should reference the appropriate 62841 series standard for safety requirements.
Q: How can I demonstrate compliance with CSA C22.2 No. 745-2-31-95 (2018)?
A: The most direct route is to obtain product certification from a Standards Council of Canada-accredited certification body. The process involves type testing to the standard, facility audits, and periodic follow-up inspections. Many global test houses offer combined IEC/CSA testing to streamline approvals for multiple markets.
A: The most direct route is to obtain product certification from a Standards Council of Canada-accredited certification body. The process involves type testing to the standard, facility audits, and periodic follow-up inspections. Many global test houses offer combined IEC/CSA testing to streamline approvals for multiple markets.
This article is intended for technical professionals and does not constitute legal advice. Users should refer to the latest official standard documents published by CSA Group. — 2026