DSH 424 Component ratings
http://decisions.iecee.org/icons/ecblank.gif DSH 424
Component ratings
56.1 b)
60601-1(ed.2);am1;am2
Standard(s)- (year and edition):
60601-1:1988 Ed.2 Am1+Am2
Sub clause(s): 56.1 b)
Sheet n°: DSH-424
Subject: Component ratings
Key words: Component, rating, requirement
Confirmed by CTL at its 39th meeting, in Cologne
Question:
56.1 b) requires that ratings of components shall not conflict with the conditions of use in
EQUIPMENT. There are no requirements for components themselves to meet specific
standards which include the control of reliability.
Decision:
It is strongly recommended that components in the MAINS PART and in APPLIED PARTS
should comply with recognised component standards, consistent with their use. The following
hierarchy of acceptable standards is suggested:
1. International standards (e.g. IEC, ISO etc.)
2. National standards (e.g. BSI, DIN, UL etc.)
3. Component manufacturer standards, covered by suitable quality control procedures.
The manufacturer’s tests and controls, supported by appropriate technical documentation.
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