I've never seen a plug/socket combination which needed this
What do you mean by this? Those things are extremely common in the UK.
>I've never seen a plug/socket combination which needed this
What do you mean by this? Those things are extremely common in the UK.
I've never seen a plug/socket combination which needed this. I'd replace the cord. Or the power supply. If they can't handle cable norms, they might also not handle fire safety regulations.