An answer to the question can be found in IEC950 section 2.7.4 table 1 and 2. CENELEC EN60950 has its own wording and allows the building installation to provide protection for earth faults for pluggable equipment type A (household type plugs). This is probably valid for CE marking for the LVD even if national deviations to IEC950 exists for some countries (including Denmark and UK)
Karsten Knud Nielsen DELTA Electronics Testing >>> Tatterton Phil FL-UK <[email protected]> 13. Nov 1996 18.21 >>> >>> Can anyone clarify the requirements regarding the fusing of both line and neutral supply conductors? It seems that where ( 230V) equipment is powered from a supply where the neutral is connected to earth then a fuse should not be fitted in the neutral. This is the situation in Europe. In the US this equipment may be powered from a 208V supply which does not earth the neutral (often the situation in labs). Should both line and neutral be fused in this case? Appreciate any comments, Philip Tatterton
