The main use of clamp meter is for leakage current test in case of any power supply related issue. Since you cannot predict when such issues will show up, it’s recommended to have all the necessary tools well in advance. There are many online and offline stores that provide such current testing tools that you can use. Visit them and buy one according to your budget and needs.
If you don’t feel comfortable buying clamp meters, then you have to contact an electrician even for the smallest of power supply related issues. Decide which way you want to go and take action now.