How to install a mains powered video doorbell?

[Sprogginz]

This thread has actually two different questions but would really appreciate it if both were addressed with the first one not really being about electrical but where to feed the wires.

I want to install the mains powered Ring Video Doorbell Pro for my friend in her new build house. I know you can get battery operated ones but after some research I've realised they've had to compromise the features and video quality not to mention she would have to keep recharging the battery possibly every two weeks which is no good since she can be away for more than that.

The first question is whether I can get away with drilling a hole for the wires in the uPVC door frame or would it have to be through the wall? As you should be able to see in the photos there's not much room to play with.



If possible, would it also be also possible and easy to temporarily take the metal door frame strip out so that I can feed the wires down to the bottom and bring them out near the skirting?

I don't know if it's going to be like opening a can of worms and if it's in sections preventing me from feeding it down anyway. I would however like to see what I'm drilling through in case there's an obstacle there. Are there any pitfalls to consider?

The other option of course is through the wall and that might be better if it's possible to wire the bell directly to the CU using a transformer that fits in there (seen one here in Screwfix) which is my next question. The burglar alarm in the CU isn't in use and number 5 is empty but not sure if the transformer can be put there and whether I'm allowed to make a small hole at the side of the CU to feed the wires? I know have to put a thick sheath on them to prevent interference.



Originally and apparently the Ring Video Doorbell Pro use to come with a transformer that you put in the CU but now only a 3-pin power adaptor plug is supplied which I can still use as there's a socket below the CU hence the reason for feeding the wires near the skirting and running it along there.

Any advice would be much appreciated. I get the sense that wiring it to the CU method would be cleaner but don't know it's unfeasible.

Thanks very much.

 

[flameport]

It's possible to drill holes in doorframes, but it would be far better to drill through the wall.

As the consumer unit appears to be a very short distance away, drilling diagonally through the wall should allow the cable to exit the inner wall right next to the CU.

 

[Sprogginz]

Thanks for the diagnal tip, never thought of that.
Is it acceptable (legal) to make a hole in the side of the CU or should I just use the power socket below instead?