How to connect a switch with a socket in one case?

Good afternoon, Michael.

To the logic of my decision was clear to you, I will depict the power supply circuit of the kitchen lamp. I’ll draw not a circuit diagram, but a wiring diagram - I’ll call it Scheme No. 1 (given below the response text).

The figure shows that the circuit breaker breaks the phase wire. The neutral wire that the outlet needs is not here. He goes to the lamp directly from the junction box. The latter is usually located near the ceiling opposite the lamp. After all, zero and phase, originally walled into the wall, then stretch to the lamp along the openings of the ceiling slab.

Zero for the outlet will have to be pulled from the distribution box. The wiring diagram "socket + switch" is shown in diagram No. 2. It uses the connection of the phase of the outlet by a loop from the phase of the switch.

I draw your attention - under the zero wire for the outlet you will have to ditch the wall. In order for the outlet to become more independent, you can lay the phase wire going from the distribution box there. This option is represented by scheme No. 3.

Practical advice: before strobing the wall, with an indicator that senses the wiring under the plaster, determine the path of the phase wire going to the switch. Work with the voltage off.