Hi @Noyade
As photo shows 2 screws Period. I also quote @homediy says" I wondered why the electrician didn't put in the bottom screws."
The 2 screw is a bare minimum . And as @EricL says if it is firm then I agree with him that is ok Electrically fine
We all seen some one trip on a power cord and that can pull on the wall socket that is where the extra screws make a difference.
Back to answering @homediy Questions
I re quote "Thanks, I wondered why the electrician didn't put in the bottom screws. Could screwing it in there actually be an issue ie there was a reason behind that he didn't I wonder? There are two screws centre either side too.
The center screws either side are for use with the Plaster bracket and is good power point for having them, Usual the brackets have their own screws so its nice to have spares built in they wont work into gyprock though.
Normally power points should be away from all plumbing etc a minimal distance and the screws should only go the depth of the gyprock any further is tempting fate as there are electrical wires close by You asked if your power point was safe? Electrically Yes it is.
But in gyprock they can pull out of the wall !!. I myself have a loose gyprock mounted power point of the clamp sandwich kind I saw the kids pulling the plug out by the power cord in whipping motion (kids they where not to know till taught, they understand now and never where in trouble) I would say I was not the first time so One of my new inside jobs is strengthening gyprock around that power point. Electrically safe but loose. I suspect
Gyprock sheet failed on the outer side. My power point is also screwed on one side to a stud. So the extra strength stopped it coming off the wall and not electrically un safe.
The extra redundancy paid off.
