If you're planning an electrical or communication installation in a commercial or residential building in Canada, you might encounter FT4-rated cable. But what does that mean, and when should it be used?
what is ft4 cable used for
This guide explains what FT4 cable is, where it’s used, and why it matters for building safety and code compliance.
What Is FT4 Cable?
FT4 is a flame test rating used in Canada, specified under the Canadian Electrical Code (CEC). It refers to a cable's fire resistance performance when tested in a Vertical Flame Test for Cables in Cable Trays (CSA C22.2 No. 2556 / UL 1685).
✅ What FT4 Means:
The cable can limit flame spread when installed vertically on a cable tray or wall.
It has medium flame-retardant properties—suitable for most commercial and residential installations.
It does not produce excessive smoke or dripping when exposed to flame.
What Is FT4 Cable Used For?
FT4-rated cables are suitable for general-purpose installations in non-plenum spaces, such as:
🔌 Power and Control Wiring
In commercial and industrial buildings
Between panels, switches, and machines
🏢 Residential and Commercial Buildings
Behind walls, in ceilings, or conduit
Anywhere that doesn’t require FT6 (plenum-rated) or FT1 (low risk) cable
🖥️ Data and Communication Systems
Ethernet cables (Cat5e, Cat6, etc.) labeled FT4
Low-voltage control and automation wiring
Where FT4 Cable Is Approved for Use
According to the Canadian Electrical Code, FT4 cables are approved for use in:
| Environment | FT4 Cable Allowed? |
|---|---|
| Residential homes | ✅ Yes |
| Commercial buildings | ✅ Yes |
| Conduits and raceways | ✅ Yes |
| Air plenums (HVAC spaces) | ❌ No (use FT6 instead) |
| Outdoor/buried locations | ⚠️ Only if additionally rated for sunlight or direct burial |
Important: FT4 is a fire rating—not a weatherproof or voltage rating—so you must still choose a cable suitable for the electrical and environmental conditions.
FT1 vs FT4 vs FT6: Flame Ratings in Canada
| Rating | Flame Resistance | Typical Use |
|---|---|---|
| FT1 | Basic | Single cables in open air |
| FT4 | Medium | General building installations |
| FT6 | High (Plenum) | Inside air ducts or plenums |
If you're installing cables in plenum spaces (air return ceilings, HVAC shafts), use FT6-rated cable.
How to Identify FT4 Cables
Look for printed markings on the cable sheath such as:
This indicates the flame rating (FT4), standard (CSA), cable type (e.g., Cat6), and voltage rating.
Conclusion
FT4 cables are designed for safe, flame-resistant performance in walls, ceilings, and conduits throughout most buildings in Canada. Whether you're wiring power, data, or control systems, FT4 is a reliable and code-compliant choice for general-purpose use—except in plenum spaces.
Need FT4-Rated Cables?
We offer a wide selection of FT4 flame-rated cables, including THHN, Cat5e, Cat6, control cables, and fire alarm wire—ready for residential, commercial, and industrial projects. Contact us to get the right product and technical support.
3 comments
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Totcables 07/08/2025
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