A breakaway cable is made from steel cable, sometimes plastic coated it is connected between towing vehicle & trailer and should pull tight to engage the trailers brakes allowing the towed vehicle to come to a halt away from the towing vehicle should it become unhitched.
Most tow bars have either a drilled hole or attachment specifically intended to accept the breakaway cable’s spring clip.
Some styles of towing bracket do not have a place intended for the spring clip, like ones fitted with detachable tow balls. In these instances, the cable can be looped around the tow ball.
The breakaway cable should never become taught, it should be of sufficient length to reach and ensure it does not pull the handbrake on when turning a corner. It is advisable that the breakaway cable fitted should be approved by the manufacturer of the coupling.
Even though rare, most incidences of the trailer or caravan becoming detached happen within a short time of setting off, it is usually because part of the hitching up the vehicle has not been carried out correctly.
Other instances have been noted when a caravan fitted with an Al-ko stabiliser head has been hitch up to a standard two bolt fixing flange towball. An extended neck towball is required for use with these stabiliser heads. Please always ensure you have all the correct equipment fitted prior to towing.
Trailers that are not fitted with brakes require a secondary coupling, this is usually either a chain or cable which is sufficiently strong enough to continue to tow the trailer and short enough not to allow the coupling to come into contact with the ground should the trailer become detached from the towing vehicle.