Quite long time to switches treated only as functional elements of interior. Therefore and to the choice the switches of special approach were not. Was considered that the this element of interior, the better is more imperceptible. But with the advent of huge variety of switches the attitude to their choice was a little changed.
1. On way of fastening of electrical wiring the switches are divided into screw and screwless. Screw switches are intended for aluminum wiring which has property to heat up, be deformed and even to sparkle. As a rule, when using screw devices it is enough to tighten up the screw which holds aluminum wire, and the switch will become operable again.
2. If electrical wiring copper (and such wiring in new buildings), then buy switches with screwless terminal clamp.
3. When choosing the switch it is necessary to consider one more important point: what type of wiring is established in the building (open or buried wiring). If wiring open (has remained in "Stalin-era buildings" and rural houses), is required the switch of laid on type. At the buried wiring install switches with the "drowned" box to which by means of screws the switch body is attached.
4. Besides, exist one - switches two-, three-keyboard, etc. In assortment of some Asian and American firms there are many six-keyboard models of switches. But, according to experts, too large number of keys can negatively affect reliability of this device.
5. As for functionality, switches can be ordinary, control (they are called still "indicator") or svetoreguliruyushchy.
6. When choosing the switch it is necessary to pay attention and to how mobile elements move (mobile parts are in all devices, except those which cope with the help of the remote control). Mobile elements of the switch have to move freely, but at the same time not dangle.
7. Also exterior of product is important. For example, there are switches with replaceable multi-colored frame (it can be chosen to match wall-paper). Besides, there are models in which illumination of keys is provided: such device can serve as "indicator" at night.