Hi Glenn:
Thanks for your questions...
> Both cl 1.2.5.1 and 1.2.5.2 say ...plug and socket-outlet OR an
> appliance coupler OR both. If my product uses an IEC320 plug for the
> wall, and an IEC309 ac inlet to the product, is it type A or B?
The issue is high leakage current. Because the leakage
current is high (i.e., more than 3.5 mA and therefore
potential injurious), the connection to ground must be
assured by the choice of connection to the supply (and
thereby the connection to ground).
High leakage current requires a high-integrity ground. A
high-integrity ground is provided by industrial grade plugs
and sockets such as those in IEC 309.
Ordinary plugs and sockets such as those in IEC 83, and
appliance couplers specified in IEC 320, do not provide a
high-integrity ground as required for high leakage currents.
You propose to use an IEC 309 high-integrity ground plug in
one location, and then convert to a different (low-integrity
ground) plug (IEC 320) at another location.
This defeats the high-integrity ground provided by the IEC
309 plug.
Best regards,
Rich
ps: You can't use an IEC 320 plug for the wall. IEC 320
devices are, by definition, appliance couplers. They
are ALWAYS located at the load end of the power cord,
not the supply end.
If you are using an IEC 320 plug, then you are plugging
it into an IEC 320 outlet located on another piece of
equipment or multiple outlet strip. You are NOT
connecting to the building supply.
