QUOTE (nimrod @ Nov 6 2009, 11:12 AM)
For those who may not be aware of the regulations of brakes on a trailer.
If a trailer itself ( unladen ) weights more then 150 kilo it is required that it has override brakes fitted.
If a trailer + it's gross weight exceeds 750 kilo then that trailer requires override brakes.
I actually went down to the RTA in botany & had a word with wun of the inspectors rather than speak to a clueless desk jocky.
Also bear in mind I spent a few $$'s setting my tow vehical up to tow [irrelevant as far as RTA goes but I have peace of mind]
THE LAW
In December 1998 an agreement was reached by all State Ministers of Transport to implement national towing regulations throughout Australia. The uniform law states all trailers with an Aggregate Trailer Mass (including the load) over 750 kg must be fitted with brakes to comply with the national road regulations.
According to the Australian Design Rules, all trailers over 750kgs GTM, irrespective of the towing capacity or unladen mass of the tow vehicle, must have an effective brake system fitted. All brakes must be operable from the drivers seat of the tow vehicle except for over-ride brakes.
The minimum braking system required for a trailer or caravan depends on its type and weight, as well as the weight of the tow vehicle.....
• Up to 750kgs GTM: No brakes are required.
• 751 to 2,000kgs GTM: There must be a braking system on the wheels of at least one axle and over-ride brakes are permitted. However, for caravans exceeding 1000kgs, independent brakes (electric brakes are the most common
form) are strongly recommended.
• Over 2,000kgs GTM: A brake system operating on all wheels is required. The system must be capable of automatically activating should the trailer become detached from the tow vehicle. Under these circumstances the brakes must remain applied for at least 15 minutes. These 'break away' systems are compulsory on all trailers over 2,000kgs GTM.
WHAT IS AN ELECTRIC BRAKE CONTROLLER
An electric trailer brake controller is a device that supplies power from a vehicle to a trailers electric brakes when the vehicles brakes are applied. Any trailer with electric brakes needs a brake controller to activate the operation of the brakes.
HOW IT WORKS
Power is fed from the vehicles stoplights into the controller, activating the trailers brakes via a separate heavy duty circuit fed through the trailers connecting plug and socket. This allows the trailers brakes to come on automatically when you apply the vehicles brakes, at a rate set by the controller. When the controller is adjusted correctly, the driver will be able to slow the tow vehicle and trailer combination just as smoothly as if the tow vehicle was by itself.
It is important the wiring is heavy enough for the power to run through to the trailer with a good earth return, not just earthed to the body. Of course proper maintenance of the brakes with regular adjustment of the shoes & care of the magnets goes without saying.
WHERE DOES IT GO
Most electric brake controllers are of a slimline contoured design allowing under dash placement easily within the drivers reach. From the drivers seat you can control the rate of brake application from soft to aggressive my simply moving the control forward or backward. Most controllers also have a manual over-ride device which allows the user to apply the trailers brakes independently of the vehicles brakes.
TYPES OF CONTROLLERS
There are two types of electric brake controllers - motion sensing or pendulum style and time delay activated or solid state. Although the controllers methods are different, both types of controllers are very similar. Both allow the user to adjust output or braking power & both have a pressure sensitive manual over-ride trigger that can be used to apply the trailer brakes independent of the vehicles brakes & as well as having the same wiring configuration.
MOTION SENSING or pendulum style controllers are enabled by the brake pedal switch and activated by a pendulum circuit that senses the vehicles stopping motion and applies a proportional voltage to the trailers brakes. When properly adjusted the trailer will decelerate at the same speed as the tow vehicle. This increases braking efficiency and reduces brake wear. A big advantage of the pendulum style controller that it will operate well under adverse braking conditions and have a smooth braking action. Although most pendulum style controllers are bulky, more expensive and must be mounted and calibrated level, there are exceptions such as the new generation controllers like Tekonsha Prodigy.
TIME DELAY controllers operate the trailers brakes at a pre-determined braking rate. These controllers are designed to activate the brakes at a set delay from when the stoplights are activated. In some instances the rate of brake application is no different for a gradual stop to that of an attempted emergency stop. It is important to note that while time delay controllers provide some braking, it does not provide the most efficient balanced braking for the combination of car and trailer. Time delayed controllers are inexpensive, have a low profile, and can be mounted on any angle.