Leaving components on

Is it safe to leave the adapter of the turntable plugged in? Or it would be better to unplug it?
Please be more specific: What turntable? AC-adapter?
Is the platter spinning, when you leave the "adapter plugged in " ?
Sorry, I meant the power source. After I turn off the platter -an old Oracle that I bought second hand- I leave the power source plugged in . I wonder if it is harmful -the power source remains warm- to leave it like that. Thanks for your attention.
I used to own an Oracle. I did the same, wasn't harmful on my case. AtB
Thanks for your kind attention and answer!
A pleasure, and thanks for your thankyou, which more often than not does not happen here. Thanks for the points as well, which I returned with pleasure.