42. Smoke Density Test in accordance with IEC 61034-1 & IEC 61034-2
IEC 61034-1:2005 / EN 61034-1:2005 / BS EN 61034-1:2005 / DIN
EN 61034-1:2006 / VDE 0482-1034-1:2006 Measurement of smoke
density of cables burning under defined conditions.
Part 1: Test
IEC 61034-2:2005 / EN 61034-2:2005 / BS EN 61034-2:2005 / DIN
EN 61034-2:2006 / VDE 0482-1034-2:2006 / CEI EN 61034-2:2006
(CEI 20-37/3-1) Measurement of smoke density of cables burning
under defined conditions.
Part 2: Test procedure and requirements.
The standard specifies a method of measurement of smoke density of cables. Part 1 specifies the
test apparatus and Part 2 specifies the test procedure.
The test is usually performed inside a chamber of 3m x3m x3m and the test is sometimes described
as 3 metre cube test. The test is performed by monitoring the tranmittance reduction of a white light
beam, running from one side of the chamber to the other, at a set height, thus monitoring the build
up of smoke inside the chamber. The minimum percentage of light transmittance is often used to
determine if the cable has passed or failed the test , often a minimum light transmittance of 60% is
applied in order to classify a cable as low smoke