This could depend on the source of the 48VDC. If batteries, the directive would probably not apply. If from rectified and filtered mains, the degree of isolation from the mains would have to be examined. It would also have to be established that you are properly isolated from anything that is not selv or tnv-1.
Eli Orsoff TUV Rheinland of NA Orlando, FL Office -----Original Message----- From: Douglas McKean <[email protected]> To: [email protected] <[email protected]> List-Post: [email protected] Date: Tuesday, November 10, 1998 7:23 PM Subject: Low Voltage Directive (73/23/EEC) >The Low Voltage Directive (73/23/EEC) applies to >equipment that operates from supply voltages of >50-1000Vac or 75-1500Vdc. > >Does this mean that strictly according to the >standard *in and of itself*, that is according >to 73/23/EEC by itself, safety testing need NOT >be applied to ANY piece of equipment that operates >from 48vdc in a Central Office? > >Specifically, say a piece of equipment in the rack >that does not touch the E1 line? > >What am I missing here ... > >
