In winter or after a long parking lot, a discharged battery becomes a problem that almost every motorist has faced. In such a situation, lighting wires come to the rescue, allowing you to start the engine from the charge of another car. However, not all cables are equally effective: cheap models can melt on the first try, and their clamps do not provide reliable contact.
Choosing a quality product is critical to the safety of your vehicle and on-board electronics. Cross-section of wireThe insulation material and the design of the clamps directly affect the strength of the current that can be transmitted without loss. In this article, we will analyze the technical nuances, compile a rating of reliable models and teach them to use them correctly to avoid short circuit or damage to the generator.
Properly selected equipment will guarantee that you will not be left alone with a idle engine in the cold. We have analyzed the characteristics of dozens of samples so you can buy a really working tool.
Criteria for the selection of reliable start-up wires
When choosing the starting cables, pay attention to the first thing. copper-section. It is the cross-sectional area that determines the current throughput. To start a gasoline engine with a volume of up to 2.0 liters, a section of 16 mm2 is considered to be the minimum permissible, but it is better to focus on 25 mm2 and above. If the wire is too thin, it will warm up and the voltage on the starter will drop, making the start impossible.
The length of the cable also plays an important role. The optimal distance is considered to be 3-4 meters. Longer wires (5-6 meters) have greater resistance, which causes a loss of power, and shorter wires can be inconvenient to use if the cars are unsuccessful.
Pay attention to the design of the clamps. They should be made of copper or brass, not coated steel, and have a powerful spring. "Crocodile." with teeth provide better contact with the terminals of the battery, piercing oxides. The plastic on the handles must be frost resistant so as not to crack when compressed to -30 ° C.
Materials review: copper vs. aluminum
The basis of any high-quality wire is a metal conducting current. On the market there are products with copper and aluminum veins. Copper. It has excellent conductivity and flexibility, which allows the cable to remain elastic even in severe frosts. This is the best choice for regular use.
Aluminum wires are much cheaper, but their conductivity is lower, and the mechanical strength leaves much to be desired. With frequent flexion, the aluminum vein can break inside the insulation, and you will only find it when you need it. In addition, aluminum is oxidized faster in air, which increases the resistance of contact.
⚠️ Note: If you see silver metal on the wire cut, rather than yellow-red, aluminum is in front of you. For powerful engines, such wires are not suitable - they can melt under load.
Isolation also matters. Rubber shell (e.g. from TPE or PVC) must withstand the effects of oils, petrol and low temperatures. Cheap plastic in the cold sulphur and crack, baring the current parts, which creates the risk of short circuit.
Rating of popular models of start-up cables
Based on the analysis of the market and user reviews, it is possible to identify leaders in different price categories. Below is a table comparing the key characteristics of popular models.
| Model | Section | Length | Max. current |
|---|---|---|---|
| Heyner StartPro | 25 mm2 | 3.5 m | 400 AA |
| Berkut Specialist | 16 mm2 | 3.0 m | 300 A |
| Airline Expert | 95 mm2 | 3.0 m | 1000 AA |
| Stels 200A | 10 mm2 | 2.5 m m m m | 200 A |
Model Heyner StartPro It has proven itself as a reliable option for passenger cars. Good insulation and quality clamps make them popular among drivers. For SUVs and diesel cars, it is better to consider more powerful options, such as: Airline Expert, which are able to withstand initiation currents up to 1000 Amps.
Budget options like Stels Suitable only for small cars with a gasoline engine and a serviceable, but slightly discharged battery. Trying to light up a frozen diesel is a risky idea.
For diesel engines with a volume of more than 2.0 liters, choose wires with a cross section of at least 50 mm2 and a starting current of 600 A.
Safety Techniques for Smoking
The process of starting the engine from an external source requires strict adherence to the sequence of actions. Disruption of the connection order can lead to the combustion of electronics or the explosion of the battery due to a spark.
☑️ Procedure for connecting wires
Always connect first. wire (red) to the plus terminal of the discharged battery, then to the plus of the donor. The negative wire (black) is connected to the donor’s minus, and the second end is connected to the unpainted metal part of the engine or body of the receiving car. This is done to ensure that the spark slips away from the battery, where explosive fumes can be released.
After connection, you need to give the charged battery to work 5-10 minutes at higher speeds to slightly recharge the saturated battery. Only then can you try to start the car. If the engine did not grab the first attempt, do not spin the starter longer than 5 seconds - let the wires cool down.
⚠️ Warning: Never connect a sub-conductor directly to the sub-conductor terminal of a discharged battery if this is avoidable. Sparkling near the battery can lead to the ignition of hydrogen.
What to do if it sparkles when connected?
Sparkling when the last terminal is touched is normal, as current appears in the circuit. However, if the sparks are strong and (permanent), check for polarity - you may have confused plus and minus. Disconnect the wires immediately and recheck the connection scheme.
Typical mistakes of motorists
One of the most common mistakes is to use wires that are too thin for a powerful engine. Owners of large SUVs often buy cheap kits that visually seem thick due to insulation, but inside have a thin aluminum vein. At the time of launch, such cables are instantly heated and can melt.
Another mistake is to start the donor engine at maximum speed. Not only does this not help, but it also poses a risk of a power surge that could disable the sensitive electronics of both cars. The turnover should be slightly increased (about 2000 rpm), but not limiting.
It is also dangerous to leave cars connected by wires after a successful launch. Once the engine is running, the wires need to be turned off in reverse order: first minus from the started car, then minus from the donor, then plus from the donor and at the end plus from the previously discharged battery.
Before buying, always check the length of the wires folded. Too long cables are difficult to compactly fit in the trunk, and they can interfere with other things.
Care and storage of start-up accessories
For the wires to last long, they must be stored properly. After use, especially in winter, the cables can be wet. Before packing, it is advisable to wipe them with dry rags to exclude corrosion of the metal parts of the clamps.
Store the starting wires is best in a bag or case, in a dry place. Do not leave them in the cold in the trunk permanently if possible, as the freezing and thawing cycles break down the insulation. However, it is necessary to carry them in the car in winter, so choose models with a frost-resistant shell.
Periodically check the condition of the clamps. If the spring is weakened or the teeth are dull, the contact will be poor. If necessary, the clamps can be replaced or cleaned contacts from oxides with small sandpaper.
Regular checks of insulation integrity and contact density of the clamps prolong the life of the wires and ensure safety when used.
Can I light a car with a donor engine running?
Yes, modern cars with serviceable generators and voltage regulators allow you to light with a working engine. This helps to recover the charge faster. However, try not to gas excessively so as not to create power surges.
Will the electronic blocks burn when you smoke?
The risk exists only when the wrong connection (polarity is confused) or when using a very powerful donor (for example, a truck) for a small car without stabilization. If you follow the rules and use cars, the risk is minimal.
What thickness should be the wires for diesel?
Diesel engines are characterized by high initiation currents, especially in winter. It is recommended to use wires cross-section of copper vein at least 50-70 mm2 and up to 4 meters long. Thin wires just won't turn the starter.
Why do the wires warm up when lighting?
Heating occurs due to high resistance of the vein (small cross section, aluminum instead of copper) or poor contact at the joints (clamps). If the wires are very warm, the process should be stopped immediately to avoid fire.