Hi
there are various IEC sockets and plugs which allow different amp
ratings..
Sockets (female, the one on the cable are C3,C5,C7,C13,C15 (the one the
the notch) and C19 the retangular one.
The plugs (male) on the equipmnet are C4,C6,C8,C4,C16 (the notch) and
C20
I have posted a detailed drawing on my site at
www.flight-cases.net/iec

which i hope will solve all your problems. The company Bulgin make
versions of these that you can wire yourself .

hope this helps and ( a quick plug) if you ever need flight cases
please just look at my normal site http://www.flight-cases.net
Steve