Connection and fastening systems

IEC classification in accordance with DIN EN 61386-1

The OBO Bettermann pipe systems are machined and tested according to DIN EN 61386 (Electrical installation pipe systems for electrical energy and information) and DIN EN 60423 (External diameters of electrical installation pipes and thread for electrical installation pipes and their accessories).

Numeric code
DIN EN 61386-1 classifies installation pipes using a 12-digit numeric code, which provides information on the pressure resistance, impact resistance or use temperatures. You can find the first five digits in the product descriptions of the pipe systems.

First digit

Second digit

Third digit

Fourth digit

Fifth digit

Pressure
resistance

Impact
resistance

Minimum
use
temperature

Maximum
use
temperature

Bending behaviour

1

Very light
(125 N)

1

Very light
(0.5 kg/100 mm)

1

+ 5 °C

1

+ 60 °C

1

Rigid

2

Light
(320 N)

2

Light
(1.0 kg/100 mm)

2

− 5 °C

2

+ 90 °C

2

Bendable

3

Medium
(750 N)

3

Medium
(2.0 kg/100 mm)

3

− 15 °C

3

+ 105 °C

3

Bendable, self-healing

4

Heavy
(1250 N)

4

Heavy
(2.0 kg/300 mm)

4

− 25 °C

4

+ 120 °C

4

Flexible

5

Very heavy
(4000 N)

5

Very heavy
(6.8 kg/300 mm)

5

- 45 °C

5

+ 150 °C

6

+ 250 °C

7

+ 400 °C