Wiring in the ripple - common errors and misconceptions

Quite often, deciding on the construction of the wiring in the ripple allowed a lot of mistakes. In this article I will talk about the most common errors and mistakes during this installation.

Corrugation has fire properties

One of the most common misconceptions is the fact that the corrugated tube has fire properties. Unfortunately, some experts even carry concealed wiring in a wooden house, not in metal pipes or metal tray, and in metal or even worse, in PVC corrugation.

Corrugated pipe is designed solely to protect the cable from external impacts. It does not have the ability to localization. During a short circuit arc easily burn through such "protection".

Remember! If you want to perform a hidden wiring for flammable materials should be used, or steel pipe (steel tray) or to protect the cable from the combustible material layer of non-combustible material, eg Plasterboard (plaster-cardboard sheets).

You can logically ask: What can happen in the middle of a solid piece of cable? And that's what can happen:

Rodents

These pests move peregryzut any plastic corrugated pipe.

Manufacturing defects.

And if the first reason you are somehow able to protect the metal hose, here from marriage in the production there.

Wiring can be replaced

Another fairly common misconception is considered the fact that the corrugated pipe is always possible to easily remove the cable and pull the other.

This statement is true only option if you need to change the cable on flat ground without bending. As soon as you have at least one turn at a right angle, then the replacement of even a single wire is transformed into a torture. And if you have a ripple few wires, something about a replacement can be immediately forgotten.

You can argue that it is very easy to change the PVA wire, because it is flexible and it is easy to be pulled back and tightened.

I think it is not superfluous to recall that the wire PVA in a hidden wiring use is prohibited. After all, according GOST 31565-2012 the premises are allowed to use cables with the performance type:

Ng-LS - does not support combustion and low smoke and gas emission.

H-HF - does not support combustion and does not emit harmful gases when burning or smoldering halogens.

A PVA in this design simply just do not release.

Using colored corrugations in the room

Take a look at the photo above, it is, you will agree, it looks beautiful, but with the fire side is simply silent horror, and here's why.

In most cases, black or orange color tells us that the material of manufacture of such corrugations - polyethylene low pressure, it perfectly prevents the penetration of moisture, but it has no resistance to fire, i.e. it is excellent off.

Now imagine that you have all the wiring is packed in here are colored pipes. It turns out that the short-circuit wiring such will contribute to the spread of fire through the house, and to localize the fire will be very difficult.

The house is allowed to use corrugated pipes PVC (Polyvinyl chloride), or from PP (Self-extinguishing polypropylene).

But the corrugated pipe HDPE (High Density Polyethylene) is recommended to use on the street, because it brings great exposure to ultraviolet and does not let moisture.

Right and wrong installation of the corrugations

- Do not create sharp corners when installing the track;

- If you need to build a piece of corrugated, use a special connecting fittings;

But sochlenyat separate pieces of tape can not.

- Do not lay one ripple multiple cables;

- Circuit Plan power and low-voltage circuit it is necessary to breed apart at a distance regulated;

- In the case of pulling in the ripple of the individual wires guided by the following table values:

That's all I wanted to tell you about common mistakes and myths when installing wiring in the corrugated pipe.

Thank you for your attention!