Hello Kristiaan: > Question: is the requirement for the FIRE ENCLOSURE also limited to the > physical location of the TNV circuit(s) or to the complete product? > Note: The material (plastic) of the enclosure may be entirely V-1 or better > but holes in the bottom are my major concern. The fire enclosure is only required for the COMPONENTS in the TNV circuit. The bottom of the fire enclosure is defined by the diagram (Figure 4E) in Sub-clause 4.6.2. If the fire enclosure bottom material is plastic, then no holes are allowed in the region specified by Figure 4E. If the fire enclosure bottom is metal, then holes in the region specifed by Figure 4E shall not exceed the dimensions specified in Table 4C. Since the openings are related to the COMPONENTS, we draw the 5-degree angle from the individual component, not from the entire circuit. Doing this allows some carefully placed holes in a plastic fire enclosure bottom. Best regards, Rich This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
