You may think that you're saving money by doing an electrical project by yourself, but this is actually putting you at risk for something potentially more costly. These possible consequences include the following:
Despite not being certified and skilled to do any electrical work, many still insist on doing so. Thus, the odds of them doing something wrong while tinkering with an electrical appliance and causing a fire (with subsequent property damage) is pretty high. Unlike ordinary fires, the electrical sort is more dangerous because using water to extinguish it would conduct the electricity and may give a dangerous jolt to anyone nearby who gets wet.
Contrary to what cartoons would have you believe, electrocution is no laughing matter. If you get a minor shock while engaged in a DIY electrical project, then consider yourself lucky; serious cases of electrocution may cause internal injury; severe burns; nerve damage, which can affect your heart and lungs; and ventricular fibrillation, which can be fatal.
Hefty government fines
Unlicensed electrical work is against the law, in Queensland the fines are up to $40,000 for individuals, while breaches that cause a death/grievous bodily harm draws a maximum penalty of $100,000 for individuals or a jail term of two years.
So before you decide to have a go at replacing that burnt out power point in the kitchen yourself, stop and think about the potential consequences if you get it wrong.