What Is FT4 Cable Used For? Understanding Fire-Rated Cables

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:

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

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.