IEC 60884-1:2002+A1:2006 clause 20的疑问
第20章有下面两段话Resistors and inductors are not connected in parallel except, if an air-core inductor is used, a
resistor taking approximately 1 % of the current through the inductor is connected in parallel
with it.
Iron-cored inductors may be used, provided the current has a substantially sine-wave form.
For the test on three-pole accessories, three-core inductors are used.
问题1：如何理解上面这段话？
Accessible metal parts, metal supports and any metal frame supporting the base of flush-type
socket-outlets are connected through the selector switch C; for two-pole accessories, to one
of the poles of the supply for half the number of strokes, and to the other pole for the
remainder;
问题2：如何理解上面这段话？
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