Wiring must be protected from damage - it's a matter of safety tenants. To isolate the wires themselves using plastic boxes, corrugated, hoses or steel pipes. And for the reliable protection of contacts (on the road branching, etc.) - electrical junction boxes.
The apparatus and especially
Junction box - is a body of self-extinguishing plastic with a lid which are interconnected by means of screws. The shape may be rectangular, square, circular. The housing has openings for entry of wires.
There are box with seals for connecting insulation boxes and corrugated PVC. For conduits of junction box are also used metal metal. There are also karbolitovye model.
In terminal boxes inside there is fixed block for wiring. Perform extensions connecting aluminum wire with copper is more convenient at the terminals. If the block device is not provided, the wires are twisted or simply buy an additional terminal.
There are boxes for outdoor installation and wiring hidden way: last meant for laying cables in Stroebe, hollows under the finishing panels for cutting into drywall (these models are equipped with special locks with springs for fixation).
For installation (especially in wooden houses) often together with metal protective tubes of metal boxes are used, since their higher fire safety.
When you purchase is necessary to pay attention to the letters on the product label. Letters may indicate:
- Climatic performance (For the middle band fit UHL model, Y);
- the degree of protection (IP code). There are models dustproof, splash-proof, explosion-proof, etc. Flush-mounted boxes are used with IP-20, to open the index - 54, 55 and more.
Installation and assembly raspredkorobok: step by step instructions
The procedure for installing the open:
- To shut down automatically at the switchboard. Make sure it is disabled: to attach to the supply cable indicator screwdriver.
- Note on the wall in place at the point of mounting fasteners.
- Drilling a hole locations.
- Secure the box: a concrete base - dowels, wooden - screws.
- Strip the wires. Interconnected terminals or twist (in the latter case contacts wrapped tape).
- Close the cover and fix screws.
Wire Colors:
- Phase - brown, black, red, white. Sometimes, other colors (purple et al., It depends on manufacturer). Schemes phase denoted by the letter L;
- zero - blue or blue, the letter N;
- earth - yellow-green, PE.
How to determine the assignment of, if a non-standard markings:
Attention: a maximum of actions to run when a power outage, and when the hands do not touch the bare wires and metal parts of the tool.
- If two-wire (no earth), you need to make electricity when the turn indicator on the screwdriver to the ends of both cores. Veins before it should be diluted in hand, and do you need to de-energized cable. The indicator lamp lights up when in contact with the phase;
- at the three-core wire phase is determined in the same way as the other functions of living you can find out with a tester: the voltage at the ground below.
Flush mounting
Installation of panels is carried out by mounting the frame for them:
- Place the cable in galvanized or metal pipe.
- To strengthen the base of junction box, to bring it to the wire and connected as described above.
- Close the lid.
Without panels for concrete walls:
- Make a wall cutting grooves for cabling and boxes with a drill crown attachment. The approximate height of the placement of the box - 20 cm from the ceiling.
- Lock housing in Stroebe via alabaster.
- Connect the wires.
- Close the lid.
- Disguise the place of installation with wallpaper or plaster.