noted, thank you!Just be careful using a regular grounded o'scope when probing AC Mains power. Beyond the safety considerations, you need to understand what the "ground" is for the o'scope power cord versus the ground for the o'scope probe lead. If they are not the same "ground", you can let the smoke out of your 'scope probe...
Update -- a good example is when you might try to repair one of the old "hot chassis" TV sets from back in the stone age. Very important to understand when to use isolation transformers in that kind of work.