Message text written by INTERNET:[email protected] >In my view, these exemptions are specifically targeted at equipment such as PBXs and network equipment that are typically installed by service personnel and include hardwired grounding.<
When Telecom equipment (of the non-network equipment variety) was included under IEC 950 it was a hard sell to the Data Processing equipment manufacturers, who did not want to see their Data Processing equipment standard polluted by telecom considerations. In addition, the telecom reps where not really PBX experts of any sort (with one exception). Therefore, in trying to interpret IEC 60950, one cannot assume that PBX and network equipment was targetted. There was a basic assumption that if the Mainframe computer and router equipment manufacturers could do it, than the telecom equipment manufacturers ought to be able to do it, over time. On another note, a lot of these type of requirements come from so-called, horizontal standards developed by other experts who have no knowledge of either Information or Communications technology practices. If you want to change these "horizontal" standards, you have to join that crowd for years till they have confidence in you, and than you might be able to change some of those things. By and large, one cannot get money for that sort of a campaign in the ICT industry. Therefore, you have to live with it. When we started the campaign for IEC950, CO voltages and currents were considered dangerous and one would have had to run telecom installations in conduit. We've come a long way. Ciao, Vic
