Terminals: types and purpose

The power, which is located on the average dwelling interacts sufficiently large number of mobile and fixed joints. By moving include switches and sockets, to fixed - space bonding wires. Most of these compounds provide terminals which ensure the most intimate contact and a secure fit.
The design of the terminals

If we consider the terminals in the functional terms, they are very simple. Terminals should fulfill only two functions: locking the wire and a conductor of electric current, however the basic design elements are conductive elements and clamps.
Clamping elements in the terminals of all types are very similar. The wire is placed in the recess into which it is screwed perpendicularly specially adapted for this screw, presses the wire in the conductor material.

However, this situation applies only to the wires. For example, spring-loaded terminals for mating with the plug socket is not in need of fixing - they are made in the form of stretched arcs that are apart with a fork while it is connected. In this case, the arc spring clamp terminals of the conductive plug from the sides, working on the principle of elastic force of the material.

Terminals in switches operate on a different principle.

One of the conductive elements to which suitable electrical wire is fixed and is secured to the second control element and is displaceable relative to the first. At break its contact an electrical circuit is opened, and the device stops working until the next turn.

types of terminals

Translated from the German terminals - it clamps. This concept in the Russian language is set to only the connecting portion of the power supply, but there are different types of them in need of classification.

• Compound wire-wire. Connection terminal of this type is usually performed as a terminal block. The bare ends of the wires are run in two special cavity, where the screws are pressed against the conductive material and fixed. Such designs are often used for the organization of open wiring or wire cuttings to connect to the desired length.

• Compound terminal wire stationary. Such devices are used to secure the sockets Plugs and uniform transmission of electric current to the recipient. According to one of the terminals of the plug voltage is applied (it prozvanivat), the second is zero. It is for this reason that, when placed in one of the metal object outlet socket is short circuited.

• Compound wire terminal - movable. Such a mechanism is used in switches. In the operative position the terminal transmits tension to the wire, e.g., for powering the lighting device and inoperative - interrupts the circuit.

There are more complete and specific classification, which are divided by the terminals for the wires (shape, size, diameter of wire channel, etc.), but its lead is not quite appropriate, since it considers the special cases and certain products of certain brands.