Rating of the best terminals for connecting wires for 2024

A modern residential building is crammed with electrical appliances, shields and other devices, interconnected by wires of a single electrical network. The points of connection of contacts become the most vulnerable places, the failure of which can lead to sad consequences. An important task is the selection and installation of such small fittings for installation as terminals, which are difficult to do without when connecting conductors or equipment.

The element base is constantly replenished with advanced developments, excluding old samples from the use. Therefore, this overview will help you not to get lost in the vast range of these electrical products. For a home craftsman who independently equips the electrical wiring in an apartment, it will be useful to learn how to choose the right models, what to look for, and what mistakes there are when choosing to avoid when buying.

General information

Terminal - a metal element or plate for fixing and connecting conductors in electrical circuits, devices and devices.

There are two types of terminals available:

1. Electrical:

• for inductors;
• in generators, starters, power supplies;
• in transformer windings, electric motors, etc.

2. Electrical:

• for switchboards;
• in power grids.

A slight difference lies in the values ​​of the permissible current load, which must be taken into account when choosing the right product.

The use of terminals has a number of positive aspects:

• there is no danger of a spark;
• reliability and long operating time;
• connection security;
• increased rigidity;
• ease of installation.

Classification

The terminals are divided according to different parameters.

1. By material of manufacture:

• copper

• nickel

• brass

• bronze

2. By isolation:

• isolated

The color informs about the permissible operating currents: red - up to 10 A, blue - up to 15 A, yellow - up to 24 A.

• uninsulated

3. By contact method:

• knife

They are used in pairs for conductors with a cross-section of up to 6 millimeters. Installed by crimping shanks. The connection is made by inserting one terminal into the other (male-female contact).

Used in household appliances - irons, refrigerators, etc.

• ring type "O"

For installation in electrical circuits with screw-retained contact connections. The screwed nut prevents the wire from slipping out and increases the contact area of ​​the contacts. Connection is done by soldering, welding or crimping.

Suitable for use not only on cable routes of large diameter, but also in electrical circuits with low currents.

• fork type "U"

Designed for electrical circuits of different power consumption, when it is necessary to frequently reconnect or temporarily connect conductors. The tightness of the contact is ensured by the tightening screw. The connection is carried out by pressing.

• plug type "B"

Detachable product, consisting of a socket with a plug, for mounting on conductors up to 6.6 mm. Marking "A" refers to the plug, "B" to the socket.

They are used in low-current electrical circuits.

• connecting sleeves

Fast and monolithic contact is made by pressing with special pliers - a crimper. Cases are used from:

• copper - GM;
• tinned copper - GML;
• aluminum - GA.

If it is necessary to connect a copper conductor with an aluminum conductor, a GAM sleeve is installed.

• maximum strength;
• outdoor use;
• non-combustible;
• resistance to oxidation;
• impossibility of accidental break.

• inseparability;
• single use.

• clampsA wide range of terminals suitable for both electrical circuits with low current loads and powerful cable routes with cross-sections up to 16 mm². The connector is fixed with crimps or bolts. As a rule, solid wires are not used for wiring.

Traditional switching devices

Terminal blocks, unlike terminals, which are an integral part of conductors, act as devices for switching wires:

• isolated;
• naked;
• with fixed terminals.

Material:

• ceramics - for installations with special temperature conditions or heating devices

• polypropylene - for lighting fixtures

• polyamide - in heavy duty pads

• carbolite - for cars and devices with high vibration loads

• polyvinyl chloride - in low-current connections

• textolite and ebonite

To reduce the contact resistance and reduce heating, conductive pastes are often used, applied to increase anti-corrosion properties.

Screw terminal blocks

Electrical (construction)

They are made in the form of steel or brass sleeves, equipped with clamps with screws and mounted in a non-combustible polymer block. Permissible load of the connected wires with a cross-section up to 35 mm² up to 100 A. Permissible voltage up to 600 V. They are mounted in the machine to install fuses that protect the line of installation of the terminal block and outgoing connections.

• simplicity of work;
• reliability of contact;
• suitable for vehicles;
• minimum price.

• the possibility of crushing wires with a screw during installation due to the softness of aluminum or copper;
• high probability of overheating with subsequent loss of contact;
• the need to use brass lugs for stranded copper conductors;
• gradual weakening of the clamping force of the screw with the need to periodically check the fastening.

Barrier

Made in the form of copper or brass plates installed in a getinax case. The permissible current strength at an operating voltage of up to 1 kW is up to 200 A. The cable cross-section can reach 100 sq. Mm. Usually used on powerful power plants.

• reliable connection contact;
• collapsible structure;
• ordering of conductors;
• dashboard, din rail, PCB mount;
• the presence of plexiglas for protection against short circuits or accidental contacts;
• visual control of the state of connections.

• increased transient resistance;
• installation duration;
• the need to equip conductors with ferrules for reliable contact.

Clamping terminal blocks

Self-clamping

The solid polymer case contains a brass-coated metal plate that is triggered when the conductor is inserted all the way. The bare conductor is then firmly pressed against the tinned tire.

• ease of installation;
• connection reliability;
• good ordering;
• low price;
• copper-aluminum connection;
• with the function of improving contact when heated.

• use for fastening a cable of small cross-section no more than 4 mm²;
• low value of permissible current up to 25 A, limiting use on high-power networks;
• the impossibility of using stranded wires due to the low rigidity when pushing through the plates.

Spring loaded

The polymer body contains two brass contact plates. One is movable, and the second is rigidly fixed. After installing the conductor, the movable contact is lowered with a latch. The installed spring is compressed, providing pressure and a secure connection.

• easy installation and replacement;
• prevention of accidental contact;
• admissibility of joining different materials - aluminum and copper;
• the ability to use stranded wires;
• the presence of a contact for external grounding.

• the possibility of weakening the pressure of the spring over time or as a result of heating;
• suitable for wires with a small cross-section no more than 2.5 mm²;
• application for currents with a low value up to 25 A.

Terminal blocks of foreign production

The best manufacturers have developed convenient technologies and innovations that have made it possible to transform classic terminals into unique connection interfaces.

Clamping Push Wire

A one-piece product that uses the properties of rigidity for a secure fit. Installation is performed by pushing the stripped end of the wire into the hole. Removal is carried out by twisting the wire.

Connector types:

• for a single wire;
• for wires with reduced stiffness.

It is practically impossible to pull out the installed wire without damage!

Power spring Power cage clamp

Universal terminal block for all types of electrical wires with cross-sections up to 95 mm². It consists of a double cage equipped with a press spring and a metal tire.

The connection is made using a compression hexagon. After installation, the key turns and the lowered press reliably presses the guide.

Typesetting self-clamping Cage clamp

Exclusive technology patented by WAGO for all conductors with cross-sections up to 35 mm². The connection is made by lifting the spring clip using a special lever. After installing the conductor, the clamp is lowered back.

Self-clamping Cage clamp S

The use does not involve the use of electrical tools. The connection is made by installing the bare end of the wire until it stops.

Criterias of choice

In the process of choosing a suitable type of terminal block for wiring, the following parameters are taken into account:

• installation method and method;
• brand and material of manufacture;
• operating voltage and permissible amperage;
• the number of conductors to be connected;
• minimum section;
• the need to connect wires from different metals.

Section selection table

The choice of suitable terminals must be carefully considered. After all, it is often necessary to combine different metals, which gradually heat up and deform. As a result - a short circuit and a complete loss of the integrity of the electrical circuit.

Screw or spring terminals are not suitable for connecting aluminum and copper wires!

Where can I buy

Before going to a specialized department of an electrical store to buy the necessary fittings, it is advisable to read the best reviews and recommendations of buyers, as well as find out the advice of a professional electrician.

There is a wide range of terminal blocks in the Elektrotovary stores, so you need to choose budget products that are suitable for a specific installation. You can find out which company is better to buy in advance or directly from a consultant who has undergone special electrical training.

In addition, you can order terminals online in the online store of building or electrical marketplaces. The Yandex.Market aggregator also offers to find out how much the required terminal block costs, read the description, compare the functionality, choose a store and order online.

Rating of quality terminals from the best manufacturers

The domestic market of electrical goods is saturated with products of Russian, European and Chinese manufacturers. Many do not pay special attention to the homeland of the origin of the terminal blocks. However, these small devices, in the event of failure, can significantly affect the safety of property. Therefore, it should be borne in mind that inexpensive Chinese consumer goods at a budget price rarely meet the requirements of standards.

The products of Russian enterprises are distinguished by their reliability, but, according to buyers, they are technologically and aesthetically inferior to goods from Europe, which are more expensive, but of the highest quality.

STEKKER

Models of the German company are used for reliable installation of electrical circuits with a large number of wires of different cores in a small limited volume, like in a junction box. Manufactured in a transparent case that allows you to monitor the state of the contact. Installation speed is ensured by the rounded ends of the operating levers.

Specifications:

	LD222-412	LD222-413	LD222-415	LD222-418	LD226-10A
Current, A	32	32	32	32	10
Voltage, V	250	250	250	250	250
Section, mm2	0,08-4,0	0,08-4,0	0,08-4,0	0,08-4,0	4
Number of contacts	2	3	5	8	12
Amount in a package	1	50	40	5	10
price, rub.	87	900	1080	247	700

• no special tools or skills are needed for quick installation;
• convenient marking;
• long service life up to 10 years;
• high quality materials;
• good fire resistance;
• modern design.

• clearly expressed are not identified.

Legrand

French manufacturer of electrical products, known throughout the world. The most popular product of the segment in question is screw terminal blocks.

Nickel plated brass products with high resistance to sudden changes in temperature. The popularity of the models is due to their durability and a large range of sizes.

Specifications:

	Block 2.5-4 sq. Mm	Block up to 10 sq. mm	Block up to 16 sq. mm	Terminal block 4x1.5-16 sq. Mm	Terminal block 1x6-25 sq. Mm
Current, A	24	57	76	80	100
Voltage, V	250	250	250	400	400
Of clamps	12	12	12	4	1
Section, mm2	2,5 - 4,0	10	16	16	25
Average price, rub.	167	310	579	262	649

• reliability;
• heat resistance;
• long service life;
• high build quality.

• clearly expressed are not identified.

Terminal blocks Legrand Viking 3 - in the video review:

WAGO

One of the leaders in the production of terminal blocks from Germany. Products are manufactured at nine factories. Single-use or reusable products are characterized by high connection reliability and ease of use.

Models in a robust ceramic case have good anti-vibration resistance and are suitable for automotive wiring. Tinned copper acts as a conductive element, providing a low resistance to durable contact. Some popular models are filled with anti-corrosion gel.

Specifications:

	221-412	221-413	222-412	222-413	222-415	2273-203
Current, A	32	32	32	32	32	24
Voltage, V	450	450	400	400	400	450
Section, mm2	0,14-4	0,14-4	0,08-4	0,08-4	0,08-4	0,5-2,5
Number of contacts	2	3	2	3	5	3
Amount in a package	20	20	5	20	5	20
price, rub.	508	570	88	443	164	186

• tight connection;
• high build quality;
• quick installation;
• stylish design.

• not suitable for use in power circuits with a load power of more than 7 kW;
• requires regular maintenance, therefore it must be in the public domain without being covered with plaster;
• many Chinese fakes and similar analogs, but with different characteristics.

Video about WAGO terminals:

Phoenix Contact

World famous brand of a German manufacturer of electrical equipment, operating since 1923. Production is carried out at 12 enterprises.

Consumers are offered over 200 types of terminal blocks used for various connections and installed on a din-rail. The products are distinguished by increased moisture resistance and fire safety. The live components are made of anti-corrosion copper alloy.

Specifications:

	Through terminal UT 6	Through terminal block UK35	Screw terminal UT 35	Plug-in terminal RT 4	Universal terminal TB2,5-QUATTRO I
Current, A	41	125	125	32	24
Voltage, V	1000	1000	1000	800	500
Section, mm2	0,2-10	0,75-50	1,5-50	0,2-4	0,5-4
Connection type	screw	screw	screw	plug clamp	screw
price, rub.	55	490	226	63	95

• high quality;
• reliable connection with fixing of the longitudinal disconnector;
• visibility of the current state;
• blocking from accidental switching;
• automatic short-circuiting;
• flexible connection;
• compact size.

• clearly expressed are not identified.

Video about the production process of terminals of this brand:

Conclusion

Thus, choosing suitable terminals for connecting wires is just starting the difficult path of an independent device of an electrical circuit for a house during repair or construction. Now you need to make the correct connection so that the entire circuit works reliably for many years without any incidents.

Enjoy the shopping!