[rokweom]

Just be careful with that, measuring mains is a bad idea with most oscilloscopes. The ground pin is usually connected to mains earth, so if you're not careful, you might create a short and blow up your scope. If you have one of these battery powered ones, it'll be fine, but the mains powedered ones are usually a no-no.

[owenversteeg]

Ah, I was referring to automotive blade fuses (which have lovely little contacts on top for measuring.) They are only rated to 32VDC so if you are running mains through that you have other issues. Indeed I'd just use my battery-powered oscilloscope to measure mains but if I wanted to use a benchtop scope I'd use an isolation transformer.