How to select different flame retardant levels of cable wiring

The world's fire standards vary, North American UL standards from high to low flame retardant, respectively:

Flame Retardant CMP (suitable for ventilation ducts or air-pressurized areas)

Non-combustion trunk-level CMR (for vertical trunk and horizontal area)

Non-combustion commercial grade cm (suitable for horizontal area)

Non-combustion general grade CMG (suitable for horizontal area)

General household grade CMX (must be laid at one root level)

The 20XX series cables of the United States are systimax with the highest level of fire-resistant CMP cables, and the 10XX series cables are cables that conform to the CMR fire rating.

The European low Smoke halogen free cable contains 3 standards:

Iec60332-3 or iec60332-1 (flame expansion and flame retardant)

IEC61034 (Smoke divergence)

IEC 754 (corrosive and toxic)

Iec60332-1 (only for horizontal) is a single root line of the vertical combustion test, low fire rating, easier to burn. Moreover, even if the flame is extinguished, it is also likely to have temper, burning carbon monoxide content is very high. The iec60332-3 (suitable for vertical and horizontal) is a cluster line of vertical combustion test, so the fire level is much higher than iec60332-1. More importantly, life-saving devices will be more likely to isolate flames, while also significantly reducing the chain of fire-induced risks.

In the IEC60332-3 standard also divided into a, B and C-class. Level a requires more cables for testing, and the flame burning time is 40 minutes when tested, and the flame burning time in accordance with the C-level test is only 20 minutes. Therefore, the cable that conforms to the iec60332-3a is more stringent than the iec60332-3c cable.

The United States Kang Pu Systimax 30xx series of cables are in line with the highest fire rating of the IEC 60332-3a standard low smoke halogen-free cable.

What is the flame retardant level of iec60332-1 and iec60332-3 equivalent to that of North America?

Iec60332-1 equivalent to North American UL's cm level

Iec60332-3 equivalent to North American UL's CMR level

We suggest that, in order to be safe, the integrated wiring section of the important situation involving personal safety is applied to the use of North American UL's Flame-Retardant CMP class or IEC 60332-3a low smoke halogen free cable.