This part of IEC 61034 provides details of the test apparatus to be used for measuring smoke
emission when electric or optical fibre cables are burnt under defined conditions, for
example, a few cables burnt horizontally. The light transmittance (lt) under flaming
combustion and smouldering conditions can be used as a means of comparing different
cables or complying with specific requirements.
BS EN 61034-1:2005 Referenced Document
IEC 60695-4 Fire hazard testing - Part 4: Terminology concerning fire tests for electrotechnical products*, 2021-06-23 Update