3.4.2. Technical area
In technical areas (such as control cabinet), the potential fire risks need to be identified, such as, the switching type
electrical assemblies of higher output or assemblies which involve hot surfaces if a defect occur. Thus, the test smoke
should be located at following points:
• The risk-prone assembly is most unfavorable for a quick detection of fire;
• The air volume for heat removal is lowest at the risk-prone assembly;
• Permanently hot surfaces can result due to liquid fire loads in case of detect (e.g., relates to diesel engine compartments).
The detection system in equipment areas must respond within 2 minutes after the beginning of smoke release under all
possible conditions of service.