Physical Address
304 North Cardinal St.
Dorchester Center, MA 02124
Understanding CSA C22.2 No. 149-1972 (R2017): Safety Requirements for Emitting Devices for Remote Control
A comprehensive overview of the Canadian standard covering construction, performance, and compliance for remote control emitting devices under the C22.2 series.
Scope
CSA C22.2 No. 149-1972 (R2017) applies to emitting devices that generate and transmit signals (e.g., infrared, radio frequency, ultrasonic) for the remote control of electrical equipment. These devices are intended for use in ordinary locations in accordance with the Canadian Electrical Code, Part I. The standard covers both mains-powered and battery-operated emitting devices, including handheld transmitters, wall-mounted controllers, and modules integrated into appliances.
The standard does not apply to receiving devices, systems that rely solely on wired connections, or equipment intended for hazardous locations unless specifically marked. Also excluded are devices rated for communication networks (e.g., wireless routers) unless their primary function is remote control.
Technical Requirements
Construction and Mechanical Safety
Emitting devices must be constructed with enclosures that protect against electric shock and mechanical hazards. Materials shall have a minimum flame-class rating of V-2 or better as per CSA C22.2 No. 0.17. External surfaces must be free of sharp edges, and any openings less than 1 mm in diameter must be shielded to prevent access to live parts.
Electrical Ratings and Circuit Isolation
For mains-powered devices, the standard requires:
- Rated voltage not exceeding 250 V AC (50/60 Hz).
- Clearance and creepage distances per Table 1 of the standard (reproduced below for reference).
- Double or reinforced insulation between the mains circuit and low-voltage signal circuits (e.g., IR LEDs).
- Capacitors across the mains must be of an approved type and rated for continuous operation at 1.5 times the rated voltage.
| Parameter | Requirement |
|---|---|
| Clearance (basic insulation, ≤250 V) | ≥ 3.0 mm |
| Creepage (basic insulation, ≤250 V) | ≥ 4.0 mm |
| Clearance (reinforced insulation, ≤250 V) | ≥ 6.0 mm |
| Leakage current (mains-connected enclosure) | ≤ 0.5 mA |
| Dielectric strength test (basic insulation) | 1500 V AC for 1 min |
Emission Characteristics and Range
While the standard does not dictate specific carrier frequencies, it requires that emissions:
- Not interfere with other equipment when used as intended (though detailed EMC requirements are now covered by CSA C22.2 No. 61000-series).
- Be stable within ±10% of the designed frequency under normal temperature conditions.
- Maintain a usable signal at the manufacturer’s declared range under line-of-sight conditions.
Implementation Highlights
Tip: Designers should note that the 2017 reaffirmation confirms the standard’s technical content remains valid. However, for EMC compliance (emissions and immunity), manufacturers must also reference CAN/CSA-C22.2 No. 61000-6-3 and -6-1, as the original 1972 edition did not address electromagnetic compatibility comprehensively.
Common Pitfall: Many engineers assume that battery-operated emitting devices are exempt from the standard. In reality, they must still meet all construction and marking requirements, including fire enclosure ratings and battery reverse‑current protection.
Key points for implementation include:
- Marking: Each device must bear the manufacturer’s name, model, electrical ratings, and the CSA certification mark (or equivalent accredited mark).
- User instructions: Documentation must include operating range, battery replacement warnings, and a statement that the device complies with CSA C22.2 No. 149.
- Field modifications: Any alteration (e.g., changing from infrared to RF) voids the compliance unless re-certified.
Compliance Notes
Compliance Benefit: Obtaining certification to CSA C22.2 No. 149 simplifies acceptance by provincial inspection authorities and reduces liability risks, as it demonstrates adherence to nationally recognized safety requirements.
Non-Compliance Risk: Devices that do not meet the insulation and leakage‑current requirements pose fire and shock hazards. In Canada, non-compliant equipment may be subject to seizure and prohibition of sale under applicable legislation.
Certification must be performed by a CSA-accredited testing laboratory (e.g., CSA Group, Intertek, UL). The process typically includes:
- Review of construction and component ratings.
- Type testing for all clauses of the standard.
- Factory inspection for ongoing control.
Because the standard is part of the C22.2 series, devices complying with C22.2 No. 149 are generally accepted across all Canadian provinces without additional testing. However, local amendments may exist for specific applications (e.g., healthcare facilities), so always consult the authority having jurisdiction.
Frequently Asked Questions
Q: Does CSA C22.2 No. 149-1972 require periodic recertification?
A: Reaffirmation in 2017 means the standard is still current. Certified products must be re-evaluated if the standard is revised or if the product design changes significantly.
A: Reaffirmation in 2017 means the standard is still current. Certified products must be re-evaluated if the standard is revised or if the product design changes significantly.
Q: Can a device meeting UL 935 (USA) be accepted in Canada under this standard?
A: UL 935 is not an identical standard. A device must be directly certified to C22.2 No. 149 to bear a recognized Canadian mark, though some bilateral agreements (e.g., CSA/UL joint certification) can reduce duplicative testing.
A: UL 935 is not an identical standard. A device must be directly certified to C22.2 No. 149 to bear a recognized Canadian mark, though some bilateral agreements (e.g., CSA/UL joint certification) can reduce duplicative testing.
Q: What are the requirements for range and interference?
A: The standard focuses on safety rather than radio performance. Operational range must be as declared, and manufacturers must ensure compliance with Innovation, Science and Economic Development Canada (ISED) for radio-frequency emissions if the device uses RF.
A: The standard focuses on safety rather than radio performance. Operational range must be as declared, and manufacturers must ensure compliance with Innovation, Science and Economic Development Canada (ISED) for radio-frequency emissions if the device uses RF.
Q: Are smart home hubs considered emitting devices under this standard?
A: Yes, if their primary function is to send control signals (e.g., IR blasters, Zigbee transmitters). Hubs that only receive signals and communicate via Wi‑Fi are exempt, but the transmitting portion must meet C22.2 No. 149.
A: Yes, if their primary function is to send control signals (e.g., IR blasters, Zigbee transmitters). Hubs that only receive signals and communicate via Wi‑Fi are exempt, but the transmitting portion must meet C22.2 No. 149.
This article is for informational purposes and does not replace the full text of the standard. Always refer to the official CSA publication for authoritative requirements.
© 2026 – Technical Standards Brief