Group,
If a telecom product is permanently connected (-48 Vdc Central Office
Equipment), is it exempt from paragraph 6.3.3 Separation of the
telecommunication network from earth, of UL 1950? I'm reading this as there
is no physical spacing required between TNV and Earth for permanently
connected equipment. How about impulse/hipot requirements?
Is there anything else in UL 1950, IEC 60950, EN 60950, that contradicts
this?
Thank you,
Dave
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