OK, I'll get more specific. I have an external interconnecting cable that contains hazardous voltages. Because of the application, in the USA I must use UL Listed CL3P cable which is rated for use in risers and air handling spaces (smoke requirements of the National Electrical Code). The insulation system of a standard CL3P cable consists of the wire insulation and external jacket, and the sum thickness is 0.4 mm. It is not clear that the insulation parts are constructed of the same material. I must determine if the cable complies with the reinforced insulation requirements of UL60950/EN60950, or if I need to have a special cable constructed. Someone mentioned that the two insulations must be the same material in order for the system to be classified as reinforced. I cannot find that requirement in the standard. Nor can I find any statement that says that a two part insulation system must consider one part to be basic insulation and the other part to be supplementary insulation. Frankly, I can find nothing in the standard that indicates why the particular construction of this cable is not allowed to be considered as reinforced insulation. The only issue at hand, it appears, is that it must be shown that the insulation is mechanically durable in the intended application. That is where I rely upon the the UL Listing - they seem to believe that it is perfectly acceptable for a 300V interconnection application - at least the kind that my equipment will employ.
Your comments would be appreciated. Richard Woods Sensormatic Electronics Tyco International ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
