Darkened contact inside terminal-pad Immediately after installation, it often indicates oxidation of copper due to the lack of a protective layer between the conductor and the clamp. Unlike standard models without filler, lamb-plate contains a special technical petroleum petroleum jelly, which displaces air and moisture, preventing corrosion at the joint sites. It is the presence of this lubricant that makes the 222 and 224 series the preferred choice for the vehicle’s on-board network, where vibrations and temperature variations create an aggressive environment for electrical connections.
Many motorists mistakenly believe that any connector is equally good, however, in a garage or when repairing the wiring of an old car, the absence of corrosion-resistant composition can lead to heating and melting of the insulation. Technical Vaseline inside the body not only protects copper, but also facilitates the insertion of a hard wire into the clamping mechanism, reducing the risk of damage to the vein during installation. Understanding the differences between pasta and nonpaste models is critical to the longevity of electrical equipment.
Principle of operation and appointment of contact paste
The basis of the reliability of the connection is not only mechanical clamping, but also chemical protection. Contact paste, laid in the terminal body by the manufacturer, performs the function of a barrier that binds copper veins from oxygen. Without such coating, copper reacts with the environment, forming an oxide film that has high electrical resistance and causes the node to heat up.
Technical Vaseline inside Wago It has a specific viscosity that allows it to stay in place for years without leaking out or drying out. When the wire is inserted into the terminal, the paste envelops the veins, filling all the micro voids between the individual wires of the multicore cable. This ensures a uniform distribution of current and eliminates local overheating.
- 🛡️ Oxidation protection: complete blocking of oxygen access to copper, which is critical for wet conditions of the under-hood space.
- 🌡️ Thermal stability: The composition retains its properties in a wide range of temperatures characteristic of the engine.
- ⚡ Reduced transition resistance: Improvement of contact conduction by filling the voids between the veins.
⚠️ Warning: Using a pasteless terminal in high-current circuits or in a humid environment can lead to accelerated corrosion and failure of the vehicle’s electrical equipment.
Review of Wago series with contact lubrication
The manufacturer produces several lines of connectors, and not all of them contain paste. Specific series are intended for automotive electricians and conditions where increased reliability is required. The most popular is the series. 222It was originally developed as a universal connector with levers and paste inside.
Series 224 It is also equipped with lubricant and is often used to connect light fixtures and low-power consumers, where quick installation with one hand is important. In contrast, the popular 221 (Compact) series is often standard without pasta, although visually they are very similar, so you need to be careful about the labeling and transparency of the case when buying for cars.
You can distinguish the model with a paste by a translucent body through which a yellowish or whitish gel is visible, or by marking on the package. For challenging operating conditions, such as connecting headlights or sensors in the engine compartment, choosing the right series becomes a safety issue.
Technical characteristics and current loads
When choosing a connector, it is necessary to take into account not only the presence of a paste, but also the nominal parameters of current and voltage. Wago's clemmings designed to work in networks with a voltage of up to 450 V, but in the car we are interested primarily in the current load, which should not exceed the permissible values for a particular size.
The table below shows the main parameters for common series with paste, which will help you choose the right component for a particular car circuit, whether it is powering the tape recorder or connecting halogen headlights.
| Wago series | Number of contacts | Wire cross-section (mm2) | Rated current (A) |
|---|---|---|---|
| 222-412 | 2 contacts | 0.08 - 4.0 | 32 |
| 222-413 | 3 contact contacts | 0.08 - 4.0 | 32 |
| 222-415 | 5 contacts | 0.08 - 4.0 | 32 |
| 224-111 | 1 entry / 1 exit | 0.5 - 2.5 | 20 |
It is important to note that these values are relevant when using copper conductors of appropriate quality. Excess current load will lead to heating even the highest quality connector, so for powerful consumers (for example, amplifiers or electric fans) it is better to use specialized power terminals or soldering.
For circuits with current above 20 Amps in the car, it is recommended to use not only Wago terminals, but also additional thermal shrinkage insulation to protect against external influences.
Instructions for installation in car wiring
Proper installation is the key to reliable contact. Despite the ease of use of lever clips, there is a technology that can negate all the benefits. contact paste. First of all, you need to prepare the ends of the wires, ensuring clean copper surface.
Remove the insulation from the wire to the length indicated on the terminal body (usually 10-12 mm). Do not leave too long a bare area, as it may not fully immerse in the paste, or too short, which will not provide a reliable clamping. The cleaning should be careful, without damaging the veins themselves.
☑️ Checklist of correct installation
After preparation, raise the orange lever in a vertical position. Insert the cleaned wire into the hole to the characteristic stop. Only then, lower the lever. You should feel the spring resistance and hear a slight click or see that the lever has stood parallel to the body.
⚠️ Warning: Never use Wago terminals with paste to connect aluminum wires without special transition lubrication, as this can cause electrochemical corrosion despite the presence of Vaseline.
Advantages of using in vibration conditions
The car is constantly subjected to vibration loads, which are the main enemy of twists and screw joints. Spring clamp In combination with viscous paste creates a system that is resistant to shaking. The spring constantly compensates for the temperature expansion and compression of the metal, maintaining the necessary pressure on the contact.
The paste in this case acts as a damper, preventing microshifts of the wire inside the clamping, which could lead to sparking. Unlike a rigid screw terminal, which can weaken over time from vibration, the system is a very simple system. Wago It remains stable throughout its entire service life.
- 🚗 Vibration resistance: The spring mechanism compensates for the fluctuations of the body and engine.
- 🔧 Lack of service: After installation, the connection does not require a lift or check.
- ⏱️ Speed of operation: Installation takes seconds, which is important for bulk work in cramped conditions.
The myth of heat
There is a feeling that Wago is warmed up. Heating is possible only when overloaded or poor contact due to dirty wire. With proper installation and compliance with the values, the temperature of the connection does not exceed the temperature of the wire itself.
Frequently Asked Questions (FAQ)
Can I add paste to the usual Wago terminals on my own?
Technically, this is possible, but not recommended by the factory. Self-addition of lubricant can disrupt the spring mechanism or lead to the use of an incompatible chemical composition that will damage the insulation of the wire.
Will the paste terminal withstand the temperature under the hood?
Yes, the body materials and contact paste are designed for a temperature range from -35°C to +80°C (short-term to +100°C), which fully covers the needs of standard automotive electrics.
What is the difference between the 221 and 222 series?
The 222 series (orange levers, often transparent body) comes with a paste and has a more massive body. The 221 series (gray levers) is more compact, transparent, but does not contain a contact paste in the base version, although it is designed for similar tasks.
Do I need to isolate the Wago connection additionally?
The terminals themselves are not sealed (IP20). For use in a car where moisture and dust are possible, it is recommended to additionally wrap the assembled garland of the terminals with insulating tape or place them in a switchboard.
Can these terminals be used for multi-core wire?
Yes, the presence of a paste is especially useful for multi-core wires, as it holds thin veins together, preventing them from breaking off when inserted into the clamp and ensuring contact with each wire.
For automotive wiring, choose Wago series with paste (222, 224) to provide protection against oxidation and vibration, extending the life of your car’s electrician.