There are seven Euroclasses: Aca, B1ca, B2ca, Cca, Dca, Eca and Fca, with Aca having the highest performance and Fca having the lowest. These Euroclasses reference several fire test standards,
specifically EN 50399, EN 60332-1-2 and EN ISO 1716. Euroclass Eca cables meet the minimum requirement of EN 60332-1-2. EuroClass Fca is applicable to outdoor cables.

Class Test Methods Classification Criteria Additional Classification
Aca and FIGRA ≤ 120 Ws-1
B1ca Smoke production(2), (5) and

Flaming droplets/particles(3) and Acidity (pH & conductivity)(4)

EN 60332-1-2 H ≤ 425 mm
B2ca EN 50399 (20.5 kW flame source) and FS ≤ 1.5 m   and

THR1200s ≤ 15 MJ  and

Peak HRR ≤ 30 kW  and

FIGRA ≤ 150 Ws-1

Smoke production(2), (6) and

Flaming droplets/particles(3) and Acidity (pH & conductivity)(4)

EN 60332-1-2 H ≤ 425 mm
Cca EN 50399 (20.5 kW flame source) and FS ≤ 2.0 m   and

THR1200s ≤ 30 MJ  and

Peak HRR ≤ 60 kW  and

FIGRA ≤ 300 Ws-1

Smoke production(2), (6) and

Flaming droplets/particles(3) and Acidity (pH & conductivity)(4)

Dca EN 50399 (20.5 kW flame source) and THR1200s ≤ 70 MJ  and

Peak HRR ≤ 400 kW  and

FIGRA ≤ 1300 Ws-1

Smoke production(2), (6) and

Flaming droplets/particles(3) and Acidity (pH & conductivity)(4)

Eca EN 60332-1-2 H ≤ 425 mm
Fca EN 60332-1-2 H > 425 mm
(1) For the product as a whole, excluding metallic materials, and for any external component (i.e. sheath) of the product (2) s1 = TSP1200 ≤ 50 m2 and Peak SPR ≤ 0.25 m2/s      s1a = s1 and transmittance in accordance with EN 61034-2 ≥ 80 %      s1b = s1 and transmittance in accordance with EN 61034-2 ≥ 60 % < 80 %      s2 = TSP1200 ≤ 400 m2 and Peak SPR ≤ 1.5 m2/s      s3 = not s1 or s2

(3)              d0 = No flaming droplets/particles within 1200 s      d1 = No flaming droplets/particles persisting longer than 10 s within 1200 s      d2 = not d0 or d1

(4)              EN 60754-2:  a1 = conductivity < 2.5 μS/mm  and  pH > 4.3

a2 = conductivity < 10 μS/mm  and  pH > 4.3

a3 = not a1 or a2

(5)              The smoke class declared for class B1ca cables must originate from the EN 50399 test (30 kW flame source)

(6)              The smoke class declared for class B2ca, Cca, Dca cables must originate from the EN 50399 test (20.5 kW flame source)

PCS – gross calorific potential

FS – flame spread

H – flame spread

THR – total heat release

HRR – heat release rate

FIGRA – fire growth rate

TSP – total smoke production

SPR – smoke production rate

 

Table 1: Classes of reaction to fire performance for cables

Test Methods Burner Duration Airflow Additional
EN 60332-1-2 1 kW 1 – 8 mins Convection No backboard
EN 50399-2-2 30 kW 20 mins 8000 litres /min Non-combustible backboard
EN 50399-2-1 20.5 kW 20 mins 8000 litres /min No backboard

Table 2: Comparison between fire test methods