What are the terminal blocks?

Electricians traditionally twist the wiring, guaranteeing its reliability and durability. To simplify their work, terminal blocks were introduced. They are created from a pair, or several pairs of contacts, placed in the block, which saves the electrician from twisting. The terminal block connects two pairs of wires with one common contact. The cores are mounted inside the connector and fixed, which provides additional reliability of these products. It is important that the terminal matches the expected voltage. An incorrectly selected design may not withstand stress. Today, terminals are actively used by electricians when installing wiring. Its use does not require much effort, while a pair of contacts is securely fixed. In this article, we will figure out what types of terminal blocks are for connecting wires.

Content:

Terminal types
Design Features
Manufacturers

Terminal types

The terminal block is actively used in various areas of electrical installation. There are terminals for individual pairs of wires, and for creating system pairs of various levels.

By the method of installation, these types of terminals are distinguished:

for connecting individual wires;
for a printed circuit board (used in electronics);
for DIN rail;
for cross modules.

Additionally, terminal blocks are distinguished by the number of rows in one connection and by the method of clamping wires: straight and angled.

According to the type of structure, the terminals are divided into:

Screw. The screw serves as the main element for fastening the wires, as can be seen in the photo.
Detachable. In addition to the main connector for attaching wires, the housing has a connector for attaching to other pads.
Push. The wires are fixed inside and secured by pressing the lever.
Barrier. The most voltage-resistant terminal block type. Used in high voltage locations.
Terminal blocks for DIN rails.
Walkthroughs. Create the possibility of two parallel connections on the same block.

In the video, a specialist discusses several main types of terminal clamps:

Variety Overview

Design Features

There are several types of terminals. They are distinguished mainly by the design of the clamp and the method of connecting the conductor, of which there are also several.

Types of Terminal Clips:

screw;
spring;
clamping stand pads;
end contact pads;
knife contact;
end clamp.

In the photo below, each embodiment is visually presented:

In addition, the terminals are distinguished by the type of conductor connection: single-core, multi-core or flexible. You can study in detail the main types of terminal blocks used in wiring, and also learn how to use them, in this video:

How to use wiring terminals

As you can see, the terminal blocks are quite multifunctional. You can choose the optimal type of pads for connecting wires. They are beautifully increasingly used in wiring.

Manufacturers

An important role in the choice of terminals is played by the manufacturer.It depends on him the selection of materials for the connector, and, therefore, its resistance to voltage. Poor quality pads can melt. The wiring may be closed, which will entail unforeseen consequences.

On average, the terminal block can withstand temperatures up to +105 ° C. The terminal block on the PCB is more resistant to temperature changes. Its limit is + 250 ° C. For high voltage, the network uses heavy-duty, ceramic terminals for electrical wiring. Their limit is up to +300 ° C. Therefore, it is important to choose the correct terminal block, depending on its purpose.

In addition, you need to correctly select the connector contact to the conductor cross section. The number of connectors in the terminal block also plays an important role. They should be selected according to the required quantity. An unclosed connector is potentially dangerous.

Today, the manufacturer WAGO Kontakttechnik is very popular. This German manufacturer has established itself with quality and affordable prices. WAGO is known worldwide. The brand is used everywhere in the installation of electrical wiring. Most often, the wagon terminals are used for junction boxes and when connecting fixtures. On the basis of the company, the latest methods of fastening to wires are being developed. This is a quality of global importance.

Phoenix Contact is a large electrical equipment company. She is also one of the oldest. The products of this company are of German quality and affordability.

Weidmüller is a company that specializes in automatic systems. Among its products there are terminal blocks. The products of this company are often used in the preparation of DIN-rails. This manufacturer of a narrow profile will allow you to make a high-quality wiring connection.

Not bad on the domestic market have proven themselves Chinese manufacturers. Chinese manufacturers Degson Electronic and Wanjie Electronic are especially popular. Domestic manufacturers also proved to be quite good in the market. However, often domestic products cost the consumer much more, and the quality of the materials is not always competitive. As a rule, the consumer chooses an inexpensive and high-quality German terminal block. This allows him not to risk wiring.

So we looked at the existing types of terminal blocks for connecting wires. As you noticed, today the market for electrical products is littered with many varieties of terminal blocks, so you can choose the right option for your own conditions.

It will be interesting to read:

Variety Overview

How to use wiring terminals