Beiträge getagged mit: "breakaway cable"

Before every trip with the trailer, you will certainly check your lighting equipment and the locking of the trailer on the towbar, but the wheels and brakes should also be checked regularly. Your trailer will have its own brakes itself if it weighs more than 750 kg. It is set that trailers can only be pulled without brakes up to a maximum permissible total weight of 750 kg. Why is this important? Because, above all, with increasing weight, the braking distance of your combination changes and the trailer infects the vehicle from behind when braking. It practically pushes the towing vehicle when braking, so that the vehicle’s brakes have to be more efficient. At the same time, there is an increased risk of pulling out of the trailer with heavy trailers without their own brake.

The overrun brake

So if your trailer is heavier than 750 kg, a so-called overrun brake is required. This prevents the vehicle from being pushed by the trailer during braking and follows a simple mechanical principle. The overrun brake works like this: When the vehicle brakes, the trailer runs on the vehicle or the trailer coupling. A lever is thrown by the forces that are generated, which in turn releases the trailer’s brakes. The more your car brakes as a towing vehicle, the more the trailer is braked by the overrun brake and the load is distributed over both brakes.

Emergency braking with the breakaway rope

If the trailer should come loose from the ball bar, the overrun brake will of course no longer work. In that case, the breakaway cable is your protection for braking the trailer. You have to attach the breakaway cable to a part of the car that is permanently installed with the vehicle; our MVG trailer hitches have a special eyelet on the cross member to which you can attach the breakaway cable. Otherwise you should use a special holder. When the trailer detaches from the towing vehicle, the pull on the breakaway cable initiates emergency braking and the trailer comes to a standstill. So you should always pay attention to the correct use of the breakaway rope, as it is very important in an emergency.

 

It makes sure that even in the event of the trailer coming loose from the coupling towbar it will still decelerate. This is what we call the safety or breakaway cable. Anyone who drives a lot with a trailer is sure to be familiar with installing it – and probably also had many discussions about it. When travelling to our neighbouring countries, the Netherlands and Switzerland, if the breakaway cable is not correctly installed or you have no safety cable, this could lead to heavy fines. For this reason, we’ve put together the provisions given by the ADAC (German Automobile Association) regarding the correct installation and use of the cable.

Breakaway cable safety mechanisms when driving in Germany

In Germany trailers in the medium-weight class, i.e. with a permissible maximum weight of more than 750 kg and up to 3,500 kg, are generally equipped with inertia (overrun) brakes. This means that in the braking procedure the trailer overruns the towing vehicle and the resulting power is transmitted by lever transmission to the trailer brakes. In the event that the trailer becomes detached from the towbar, a safety cable should trigger the brakes and bring the trailer to a halt.

The use of a breakaway or safety cable is mandatory in Germany. Where exactly the cable should be installed is not specified. However, one thing is certain, the cable may not be looped over the towbar. As far as technically possible, the safety cable has to be fixed through an opening, drill hole or eyelet on the towbar, not on the ball head.

 

How to use a safety cable correctly in the Netherlands

In the Netherlands safety devices are foreseen for both braked and unbraked trailers. Trailers up to 1500 kg therefore require a safety feature and/or breakaway facility. With trailers without their own brakes a secondary coupling in the form of a cable or chain is compulsory. This also applies for unbraked trailers up to 750 kg. With larger trailers an ultimate (at break) braking provision must be in place, i.e. a steel cable between the vehicle and the braking system of the trailer. This is only available for vehicles (trailers) with brakes.

In any case, it is very important that in the Netherlands the specified safety cables must, in addition, be attached to the towbar for both unbraked and braked trailers.

This is done with special eyelets or clamps. Simply winding the cable round the knee-joint bar is not sufficient in the Netherlands.

 

How to use a safety cable correctly in Switzerland

In Switzerland with trailers up to a permissible total weight of 1,500 kg without a service brake system, an additional safety cable, e.g. a breakaway cable is required. The Federal Office for Roads has approved additional eyelets or special fixing holes on the towbar as suitable for mounting.

 

What requires special attention with a foreign/German trailer combination in the Netherlands and Switzerland?

In accordance with the Vienna Convention on Road Traffic, the brake systems of trailers must be equipped in such a way that the trailer, even in the case of a break in the coupling device when in motion, can come to a halt. This does not apply for single-axle trailers or double-axle trailers with a wheelbase of less than one metre and the trailer does not exceed the permissible total weight of 1,500 kg. Unbraked trailers up to a permissible total weight of 1,500 kg must be connected and secured to the towing vehicle via a safety cable, i.e. a breakaway cable. General information: Since the minimum requirements specified by the Vienna Convention on Road Traffic may not be exceeded, either in the Netherlands or in Switzerland, the national provisions shall in any case also apply for trailer combinations registered in Germany, insofar as these are active road users in the Netherlands or Switzerland.

 

Please note: Our towbars have either eyelets or a drill hole for fixing the breakaway cable. Read more about how to use the cable correctly in our report on this topic.

When driving with a trailer the breakaway cable already plays a major role when attaching the trailer. The breakaway cable is responsible for an emergency slowing-down process in case the trailer backs out the towbar. A new law concerning the transportation and use of trailers has been released in the Netherlands (Art. 5. 18. 34-2) claiming that the tear-off must be a fixed part of the vehicle itself. Therefore, an option must be  provided for the driver to fix the breakaway cable to the car.

How to use the breakaway cable correctly

Simply placing the breakaway cable around the towbar is not valid anymore. There are two alternatives:

You can rather fixate the breakaway cable using a special lug which is part of our towbars in series. The lug can be found in the vicinity of the housing. Further, a special retainer can be used which makes it possible to fixate the cable to the towbar as well and also accomplishes the same purpose as does the lug.

More information on the law in the Netherlands can be found at Algemene Nederlandse Wielrijdersbond.