@mdcc_tester, @pdlouche, thanks.
I did often wonder why one of the pins on some of the plugs is plastic! And my amp is indeed double insulated.
Earth pin is often plastic on double insulated appliances as it is used to push open the shutters of the live and neutral terminals on the socket rather than provide an earth connection.
@JurekB started
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@mdcc_tester, @pdlouche, thanks.
I did often wonder why one of the pins on some of the plugs is plastic! And my amp is indeed double insulated.