DSH 402 General requirements
http://decisions.iecee.org/icons/ecblank.gif DSH 402
General requirements
20, 20.1 A-a1)
60601-1(ed.2);am1;am2
Standard(s)- (year and edition):
IEC 60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 20, 20.1 A-a1)
Sheet n°: DSH-402
Subject: General requirements
Key words: Basic insulation A-a1, intermediate circuit
Confirmed by CTL at its 39th meeting, in Cologne
Question:
The requirements in 20.1 would appear to apply also to intermediate circuits which may or may
not remain live after interruption of the protective earth conductor.
Should A-a1) be applied also in those case where the intermediate circuit ceases to be live after
interruption of the protective earth conductor?
Decision:
Requirements for Basic insulation A-a1) should be applied only to those intermediate circuits
which may be hazardous in single fault conditions.
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