Hi John:
> True SELV ..... requires double or reinforced insulation from hazardous
> live parts/parts at hazardous voltages [different expressions used for
> the same things] and basic insulation from earth. '950 SELV' allows SELV
> circuits to be earthed (see 2.2.3.3 of IEC60950:1999 or EN60950:2000 or
> of IEC/EN 60950-1).
Why does "True SELV" require basic insulation
between SELV and earth?
What is the hazardous voltage source, and what
is the current path through the body if that
basic insulation should fail?
This is a question that has bothered me for a
number of years.
Thanks, and best regards,
Rich
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