Basic requirements of
So, among the basic requirements for wiring in the bathroom are:
- linemust necessarily have a ground loop;
- for the group of lamps and sockets in the room, a separate automation system must be installed - a RCD and a circuit-breaker;
- all wiring elements must be waterproof;
- bath, sink, electrical appliance housings, risers and earthing bar must be combined in a potential equalization system;
- whenever possible choose the lamps working from a safe pressure - 12 V. LED lamps perfectly will approach in this case, tk. They are durable, consume a minimum of electricity and still have a good glow.
Regarding the way in which the wiring is installed in the bathroom, there are no clear limits to the rules. You can use both external and hidden cable laying on the walls. The only nuance is that when the wiring is open, it is necessary to choose a cable of the appropriate marking so that it is suitable for rooms with high humidity.
If all the requirements are fulfilled, then with no problems concerning electrical safety in the future you will not come across.
INSTALLATION INSTRUCTIONS
Step 1 - Create the
circuit First you need to determine the wiring layout in the bathroom. You must consider what kind of electrical appliances will be installed, what type of lighting is chosen, and no less important point - what kind of heating will be present.
Our recommendations are as follows:
- The junction box, for reasons of electrical safety, must be installed outside the room.
- It is necessary to place at least three outlets throughout the area: for connecting a washing machine, for a hair dryer near the mirror and for an electric boiler( if present).
- The switch, by analogy with the box, is displayed in the next room, next to the entrance door.
- As we said, the automation is installed on each group of wires separately: sockets, lamps, powerful technology.
- Wiring in the bathroom is placed in the wall under the ceiling, parallel to the floor. To the outlets the line drops perpendicular, strictly down. If you decide to make a suspended or stretch ceiling, the wires can be carried through it( between the profiles or under the film).
Please note that all outlets and switches must be at a safe distance from the water source - at least 60 cm. Take this fact into account so as not to put your life in danger.
Drawing the layout of the wiring in the bathroom, you can go further - to count the number of materials.
Step 2 - Select
components At this stage it is necessary not only to choose suitable wiring elements, but also to determine their technical characteristics. 
In order to make wiring in the bathroom with our own hands, we recommend choosing the following materials:
- Three-core, copper cable, 2.5 mm2 cross-section for outlets, 1.5mm2 - lamps, 4mm2 - household appliances. The best option would be the use of a foreign NYM cable, but the Russian analogue VVGng will be a successful replacement for price and quality.
- Dowel clamps for fixing the cable to the wall.
- Waterproof sockets and switches, with IP degree of protection not less than "44" and a splash-proof cover. Also, the products must necessarily have a grounding contact.
- Waterproof lamps for the bathroom, if possible, it is better to use spotlights, becausethey are easier to install, neatly look on the ceiling and can also operate from 12 V.
- For the equipotential bonding system, the power cable PV-3 1 * 6.To him additionally need to buy tips.
Step 3 - Getting Started
So, first of all, according to the wiring diagram in the bathroom, create special grooves in the walls - stitches, under the cable laying. Grooves also need to be made for sockets, switches the junction box. To do this, you can use a drill with a special crown, a diameter of 68 mm. 
Further podrozetniki and a box are established in the landing places and reliably are fixed by a solution. 
After this, it is necessary to fix the wiring in the stitches yourself using the clamp dowel or the grandfather's method - to pick up the mortar every 20 cm. The ends of the cable are cleaned from the insulation and passed to the junkets. 
Now it is possible to install the core of the sockets and switches in the seats. We draw your attention to the fact that it is better to fix the decorative cover after all the repairs so that it does not get dirty during the work. 
When the wiring is fixed in the wall, you can proceed to install the circuit breaker and the RCD with your own hands. Connect them do not rush, because.you will first need to check the correctness of the wiring in the bathroom. 
When the wiring in the room is finished, the multimeter must check the line for a short circuit in the network. If it is missing, you have done everything right and you can proceed to the decorative decoration of the walls.
There remains one no less important nuance to which a serious approach should be provided - it is necessary to make a system of equalization of potentials in the bathroom. To do this, we take our single-core copper wire and connect the body of a washing machine, a boiler, a sink, a bathtub and risers of cold and hot water. All these "points" need to be connected to the earthing bar installed in your input shield.
We draw your attention to the fact that if there is no grounding bar in the switchboard, be sure to replace the electrical wiring in the apartment with a safe one, with PE wire.
It should also be noted that for heating it is best to use electric floor heating under the tile, which can easily be laid on the floor by own strength. That's the whole technology of electrical work. As you can see, you can carry out wiring in the bathroom with your own hands, becausethe device of the system is nothing supernatural!
We recommend you to see a visual video example, in which all the stages of the technology are provided:
In conclusion
To date, suspended plasterboard ceilings and plastic panels are popular. If you decide to use them, this will only facilitate the electrical work. The fact is that when wiring the wiring in a bathroom under a false ceiling, it will not be necessary to create shtroby, but simply lay the cable in a protective corrugated pipe, as shown in the photo. Gofra, in turn, is fixed without problems by clips to the profile.
Another important point at which I would like to stop your attention is the lack of grounding in the apartment board. Indeed, it happens that the land wire can be absent. In this case, it is necessary to replace the electrical wiring in the apartment with a new, three-core, after which it is necessary to make a system of equalization of potentials, 
. That's all I wanted to tell you about how to make wiring in the bathroom with your own hands. We hope that the information was useful to you and useful in electrical work!
Related material:
- Installation of wiring in a bath
- How to make a grounding in the house
- How to install a spot light
