RCD Testing: Understanding Why Your Safety Switch Keeps Tripping

One of the most common questions that electricians encounter while conducting RCD testing is why does the safety switch keep tripping. There are several reasons why this is happening and a few of the most prevalent ones are provided below.

The Importance Of An RCD Safety Switch

An RCD that constantly trips can be really annoying. However, it is also helpful in a sense that it gives you an idea that your electrical system might be facing a bigger problem. Keep in mind that the residual current device or the RCD safety switch is installed to monitor any unusual changes in currents and to prevent you or your family members from getting an electrical shock. Every time that your RCD switches off your power supply, you should know immediately that it is trying to protect you and your loved ones from harm that may be caused by your electrical system.

You should know by now how important it is to install an RCD at home and the significance of scheduling an RCD testing on a regular basis. Be sure to contact a reputable, honest, and experienced electrician to do this for you. It would be best if they have been doing this job for several years and they have been specially trained to perform RCD testing.

Causes Of RCD Tripping

The first cause of constant RCD tripping is a faulty electrical appliance, which is unsafe to use. If you suspect one certain appliance to be causing this, there is a way for you to confirm it. You can unplug all of your appliances and reset the residual current device. If you encountered no problems when resetting the switch, you can proceed in plugging all the appliances one at a time. Reset the switch every time you plug one appliance so you will know which one of them is faulty. The most common appliances that cause an RCD to trip are the washing machines, kettles, dishwashers, refrigerators, and freezers.

A defective electrical circuit could also cause the RCD to trip so it could stop the flow of electric current into the faulty circuit. You can determine that you have a faulty device by checking if the RCD trips and you cannot reset it or if it trips again after resetting it. Based on the AS/NZS 3760:2010, RCD testing should be conducted on regular basis.

Resetting Your Safety Switch

You need to get the power back up and running every time your residual current device trips. You need to reset. The first thing you need to do is to find the main toggle switch. Its label and location vary from one device to another but it commonly comes with a “main switch” name at the front part of the RCD. If you are having a hard time finding it, you can try looking for the largest switch that is in a different position than the rest. Push the switch into the same position as the rest to reset it. You can always seek the assistance of an expert electrician if you are unable to find the switch or if you just do not want to meddle with things that you have no knowledge of. These professionals can also conduct the testing, which should be performed at least every three months.