Terminals for wiring connections: types, manufacturers, price

This exemplary operation is in the process of wiring creates different problems. We have to ensure contact reliability and protection against negative external influences. In remote places in handy easy execution of working operations. Reduce costs by selecting the cheapest terminals for wire connections. But it is necessary to clarify whether such a decision is really appropriate? Draw the right conclusions will be easy after studying this article.

Basic embodiments wiring

Responsibility cable manufacturer extends only to the product itself. Carefully selected core parameters. Calculated an electrical resistance, the ability to maintain its integrity until a certain current. Multilayer coating protects against mechanical influences, preventing destructive corrosion.

Such problems are solved when creating connections. However, in this case it is necessary to ensure the reliability and other parameters of quality of contact. We next consider how to solve the problem with the use of different technologies.

Stranding

A few decades ago, this technique is sufficient to build power lines utility purpose.

Such a decision - an obvious anachronism. However, until now supporters of the "old school" use such compounds in practice. Part of it must be recognized that they are right. Soft aluminum provides intimate contact. The shell of rubberized fabric has a high strength.

But in these situations do not take into account the significant increase in demand. The standard equipment of the modern apartments have washing machines, dishwashers, clothes dryers and ovens, air-conditioners. The total capacity when the different types of equipment is a few kilowatts. Reliable wiring prefer to create copper wires that with a relatively smaller cross-section designed for high electrical and mechanical loads.

To avoid mistakes, it is necessary to examine the authoritative recommendations. Professional electricians manual applies the latest edition of the SAE. There are marked following methods allowable connections (terminations, branching route):

• soldering;
• welding;
• crimping;
• Clutching (special devices, terminals).

As you can see, there are no twists are simply not provided. Therefore, we will examine only the qualitative ways of creating connections to the electrical circuits.

Soldering

To use the wiring soldering capacity of at least 60 watts, rosin solder. Stand need to install red-hot sting on the surface intended for this purpose. With the cable previously removed insulation (30 ÷ 40 mm). The wire is cleaned to metallic gloss coated successively heated rosin solder.

Next, make a twist. Applied to the created node rosin (liquid flux). Dipped in molten solder. If buy soldering 100W, conductors can be connected section 5-6 to 2 ÷ 2,5 mm square. everyone.

These products shrink when heated building hairdryer. Quickly and accurately provides a seal assembly, good electrical insulation.

Welding

In addition to masks gloves handy, specially prepared workplace. This procedure does not differ from conventional welding. Therefore, it is necessary to eliminate the risk of burns and eye injury excessively bright light emission in the range.

To compound 2-3 copper wires of section 2 ÷ 2,5 sq. mm using standard inverter apparatus that generates current 90 ÷ 110 A. As in the previous embodiment, first make twist length of 40 ÷ 50 mm. To prevent melting of the sheath clamp is connected, a discharge heat. Turn on the "masses". Welding is performed by special electrode, which is made of graphite rod. The duration of a single transaction limit 2-3 seconds to prevent overheating of the workspace.

pressure test

Specialized hand tools are used, the total cross section in the fir clamp for wires is not more than 120 mm sq. After removing the skins of tightly inserted into the sleeve, without voids. For reliability presses do in different positions rotated by 180 ticks °. Isolation create a shrink tube.

These basic rules will prevent the wrong action:

1. Sleeves are selected as closely as possible in accordance with the size of the cross section of conductors.
2. They are not cut, to maintain the nominal parameters of the electrical connection.
3. Not allowed the use of a hammer, pliers and other universal instruments.

When performing this working operation must preserve the integrity of the conductors sectional area. If it will decrease to increase electrical resistance. This place will be heated up to the thermal fracture line adjacent construction parts.

Terminals for connecting wires

It is this technology as one of the standards approved SAE discussed in detail below. To connect the wires used mechanical devices that provide high compressive strength. Terminals simplify installation work. Some modifications have additional functionality.

Terminals for wiring connections: the advantages and disadvantages, requirements, selection rules

For use other technologies you need to buy a special tool to master the work activities. Some types of terminals provide reliable connection without the use of additional devices.

Instead, the tool can be used a knife. The blade is directed at an acute angle to the conductor, so as not to damage it. You will also need a screwdriver, if the terminal is mounted screw terminal.

Minimum primary costs are complemented by a lack of energy costs, security, speed. Structure itself terminals for connecting wires provided good electrical isolation, additional protection from mechanical damage.

Note! It should be noted the absence of (minimizing) the negative impact on cable products.

The only significant drawback may be mentioned the need for acquisition terminals for connecting wires. But we must not forget that the alternative methods provided for flow of different materials: solder, flux, carbon electrodes, liners.

Terminals for wiring connections selected in accordance with the established design and manufacturer of permissible electrical loads. Also pay attention to the following parameters:

1. The diameter of the openings should correspond conductors clamping device.
2. The dimensions of the terminal board is selected so that it can fit inside a junction box.
3. You should check the convenience of manipulations to the terminals of a certain type in the work area.
4. If necessary selected terminals marked pads installed inside the fuse, in another specific embodiment.

How to connect the aluminum and copper wire

This question should be examined separately. The fact that at the location of contact between two different metals in the presence of water the process of electrolysis begins. It destroys conductors to the terminal connection parameters degrades completely breaks the circuit. To prevent such effects need to maintain voltage difference to not more than 0.6 mV. The table shows the electrochemical potential (in mV), which occurs when the compound of products from different materials:

It can be concluded from these data that the direct connection of aluminum and copper wires to each other is unacceptable.

It is also possible to create on the surface of the conductor protective sheath of solder. It has a minimum electric potential with respect to different metals, so a panacea. Of course, this conservation applies when the respective layer.

The main types of terminals

Simple engineering solutions

Design features for clear image. The conductive terminal elements are enclosed in a polymer shell. It is not sealed, but reliably prevents accidental contact with live parts. The simplicity of the product means lower cost. Installation operations are performed quickly and accurately with the use of a screwdriver. If the central part is made of brass, galvanic separation is provided, it is possible to connect wires of copper and aluminum.

The main drawback is the excessive force that is created when tightening the screws. On the one hand, this effect provides a reliable mechanical connection wires by means of clamps. On the other - can hurt conductor of soft aluminum and a solid copper.

Note! If necessary, the unit can be cut from the required number of contact elements.

Such models are installed in the electrical panel for connecting multiple conductors to ground. It is worth noting considerable size, lack of insulation. This product can be used repeatedly without deterioration of consumer characteristics.

In this construction, the screw moves the pad with the recess. This device fixes the conductor without damage.

Important! Aluminum parts are deformed under a static load. Over time, the electrical contact is interrupted. For this reason, all screw connections have to be checked regularly, prim.

Only after such preparation stranded wires will securely lock in the screw connection. The pressure test is recommended to perform with special tongs.

These devices are designed to create twists rules allowed. Polymeric cap prevents mechanical damage, contact with conductive materials. Inside it is installed conical spring. When the HERZ-TS firmly pressed veins. Choose a terminal based on the official recommendations of the manufacturer. The instructions indicate the maximum cross section wires.

Note! The color in this case does not matter. However, it can be used to identify various electrical circuits when connecting the wires in the junction box: phase, ground, etc..

Spring and reusable clamps for wires

This product is installed specially curved spring. She presses the inserted wire to the site of contact with the simultaneous mechanical fixing. A clear advantage is speed of execution terminal assembly operations. No special tools are needed. It suffices to remove the insulating sheath.

In this slot, you can insert just enough hard wares, so you need to find another solution for the multi-core cable. Certain restriction is a single application. But in many electrical circuits needed just such a long-lasting connection.

This name has become synonymous for multiple terminals. This design created by WAGO. In such a terminal clamp securely stranded wires without special sleeves. Dismantling is carried out quickly. To perform work operations do not need special tools. For convenience, you have to pay. Products in this category are not cheap.

other terminals

Terminals of this type are intended for connecting conductor cross-sections up to 1.3 mm. In some models, placed inside a special filler having hydrophobic characteristics. Crimping is performed using conventional pliers. The contact elements with cutting edges cut through the insulation, so a preliminary removal of the protective shell is not necessary.

Overview of manufacturers terminal connection wires

Legrand

Electrical products well-known French manufacturer is popular in the domestic market. Experts and ordinary users have reported flawless quality, exact characteristics of passport data in each consignment. It should be noted the high strength of products, a wide range.

Wago

This German manufacturer known worldwide for reusable terminals, which are discussed above. Its products are high-end segment. But high quality justifies the corresponding investments. Besides Germany, the brand plants are located in China, the United States and other countries.

Dinkle

Known manufacturer of terminal products takes the leading position in the Asian market. In-house design departments and factories DINKLE Enterprise located in China and Taiwan. The use of modern technology and careful monitoring are helping the brand maintain a high level of quality at a democratic price policy.

Where and how to buy cheap terminals for wires: price, market overview

Photo	Brand / model	type of product	price, rub.	Features
	DINKLE / DT126VP-03P	screw	26÷37	Operating current to 8 A. Maximum wire - 2.1 mm square.
	TDM / SQ0510-0002	screw	27÷34	On 12 contacts. Conductor area - up to 4 mm square.
	TDM / SQ0527-0012 / CR-413	connecting terminal	35÷40	Analogue "Vago". Rate is for a model with three sockets.
	Schneider Electric / NSYTRV42BL	screw passage	68÷85	Rated current - 32 A. Clips made of copper alloy.
	Legrand / 004,803	screw	180÷190	Without insulation.
	WAGO / 2273	compact	21÷45	The transparent part of the housing allow easy visual control of the wire placement.

mounting technology

Follow the steps below on how to properly connect the wires to each other using different terminals:

Photo	Features workflows, important nuances
	All these devices perform their functions without additional insulation. Choose a specific model based on purpose, facilities performing assembly operations.
	The simplest terminal block is made up of contact groups, which are bonded thin web. They are cut if necessary. The holes can be used for bolting the unit to the mounting plate. Brass sleeve installed inside a plastic casing suitable for connecting aluminum and copper wires.
	Self-clamping insulators selected taking into account the thickness of the conductors. The protrusions on the side surfaces facilitate secure grip during rotation.
	After stripping the insulation make twist. Place it inside the cap until it stops. Rotational movements clockwise creates a sturdy connection.
	These spring terminals are created in the non-collapsible design. Separation of the housing is not provided, so the product is chosen exactly with the required number of connections in one block.
	The slot on the body determines the length. For this tag is removed the insulation shell. Thereafter, the stripped end is inserted into the hole.
	It is fixed inside the spring clip, so a screwdriver is not required. On the internal parts during the manufacturing process applied special paste. It simplifies the operation, prevents the formation of oxides on the surface.
	It is not always clear how to connect wires for continuous operation. If subsequent upgrading with expected changes in the electrical circuit, use reusable clamps WAGO.
	In the first step the lever is bent upwards. stripping length is deeper on the back side of the housing.
	Clamp WAGO used to perform complex working processes. Latch lever easier than to tighten the screw in the terminal block. This simplification is useful when you need to hang a chandelier without an assistant.

Terminals for wiring connections are selected taking into account the characteristics of a particular project.

Videos how to connect the wires in the junction box: