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Safety is a major concern for everyone, but can only be achieved
with knowledge of how electrical equipment behaves in the event
of a fire. Cablofil steel wire cable tray has been successfully
tested and proven to meet all fire safety requirements.
1
Standard DIN 4102-12
The German DIN standard serves as a reference. As there is
no European standard on fire resistance specifically for cable
trays. The German standard specifies that the entire system of
cable trays, accessories and cables must be tested in an oven
which is at least 3 m long for a period of 30, 60 or 90 minutes at
temperatures of up to 1000°C.
The test aims to verify whether the electrical system is working
properly and make sure that sources of critical data (emergency
lighting, ventilators, emergency exit, fire alarm, etc.) can resist
long enough to provide assistance in the event of a fire.
2
Recognised independent laboratories
The IBMB (Institut für Baustoffe, Massivbau & Brandschutz) and
FIRES laboratories are recognised centres for testing and issuing
the associated certificates. They ensure that the test conditions
described in the standard DIN 4102-12 are observed.
3
Test configuration
Cablofil steel wire cable tray standard products passed the tests
without the need to develop an extensive or specific range. The
configurations used by Legrand involve wire cable trays with two
different spans (1250 mm and 1500 mm) subject to a maximum
permissible load of between 2 kg/m and 20 kg/m. The increase in
temperature follows the temperature curve (ETK) defined by DIN
4102-12.
The E 90 test does not in itself validate a wire cable tray, but
validates the combination of Cablofil steel wire cable tray with a
specific type of cable. This underlines the complexity, as well as
the relevance, of these tests, which have already been passed by a
number of cable types. Cables are tested in pairs.
The surprising
appearance of the
cable tray after the test
is quite normal. The
mechanical properties
of the cables and cable
tray are impaired but
they achieved their
objective; to ensure
the durability of the
installation for a given
period.
Fire resistance
IN THIS SECTION...
Fire resistance
1. Standard DIN 4102-12
2. Recognised independent
laboratories
3. Test configuration
4. Samples of configurations
tested
Fire resistance
and protection
Before test
During test
After test
Period
Certification
> 30 minutes
E 30
> 60 minutes
E 60
> 90 minutes
E 90