Moshe, The answer to your question is Reinforced insulation for the working voltage measured in that location.
The 72V supply is considered hazardous voltage and if an SELV circuit is present on conductors nearby, this is the type of insulation system that is required. If this "CO like" enviroment can be considered a "Restricted Access Area" per 2.1.4.2 (EN60950), or "Service Access Area" per 2.1.4.1, lesser requirements may apply. Also consider if this "SELV" circuit does not need to be classified as SELV (no operator access), you may be able to get away with no insulation, but other requirements may apply depending on how this system is set-up. Regards, Edward Eszlari TUV Rheinland of N.A., Inc. Marlborough, MA 508-460-0792 --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
