How Do I Connect Mains To Oscilloscope Input?

No I'm from NYC, living in Miami, "vacationing" in Puerto Rico. I am 99% American ad 1% Po'rican.

Thats why I know why somebody will not offend you again, becaue they find out you are not from a small country.??

someone seems feel that the people who is not from developed countries will has little knowledge. haha

C'mon Guys and ...

Lets LAL, let's have some fun and LOL!

Engineer says: A number of different approaches are being tried
Engineer means: We are still grasping at straws

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is happy to get it delivered

Engineer says: Preliminary operational tests were inconclusive
Engineer means: The darn thing blew up when we threw the switch

Engineer says: Test results were extremely gratifying
Engineer means: We are so surprised that the stupid thing works

Engineer says: The entire concept will have to be abandoned
Engineer means: The only person who understood the thing quit

Engineer says: It is in process
Engineer means: It is so wrapped up in red tape that the
situation is hopeless

Engineer says: We'll look into it
Engineer means: Forget it! We have enough problems for now

Engineer says: Please read and initial
Engineer means: Let's spread the responsibility for the mistake

Engineer says: Give us the benefit of your thoughts
Engineer means: We'll listen to what you say as long as it
doesn't interfere with what we've already done

Engineer says: Give us your interpretation
Engineer means: I can't wait to hear this!

Engineer says: See me/Let's Discuss
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Engineer says: All new!
Engineer means: Parts not interchangeable with the previous
design

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Engineering Proverb

In the Beginning was the plan.

And the plan was "good" …
And then came the assumptions.
And the assumptions were without form.
And the plan was devoid of substance.
And the darkness was upon the face of the workers. And they spoke among themselves saying: "It is a crock of sh_t, and it stinketh"

And the workers went unto their supervisors, and sayeth: "It is a pail of dung, and none can abide the odor Thereof!".

And the supervisors went unto their managers and sayeth unto them, "It is a container of excrement, and it is very strong, Such that none can abide it."

And the managers went unto the directors and sayeth, "It is a vessel of fertilizer, and none can abide its strength." And the directors spoke amongst themselves, saying one to another: "It contains that which aids plant growth, and is very strong."

And the directors went unto the vice presidents and sayeth to them, "It promotes growth, and is very powerful."

And the vice presidents went unto the president, and sayeth unto him, "This new plan will actively promote growth and efficiency of this company, and certain areas in particular" and they were enlightened.

And the president looked upon the plan, and saw that it was good.
And the plan became policy.
And this is how sh_t happens.

Engi_near_disasters!

http://starrigger.blogspot.com/2007/09/incredibly-stupid-engineering-by.html

Something just scared the "bejes..." out of me!

I noticed that I've advanced to "Power-User"; Hmmmm, fate or coincidence?

Maybe I'll play with my emoticons or whatever they're called, I got TIME!

Notice the use of the word GOT?

PS. Always refer to advice on bottom of POST!

Hum, uh, mmmmmmm, uhhh, I got youuuu....dee doo dee do de do dee,

I goooot you, de do de do de do dee, so good, so right; I got you...

Tun, tun ,tun...Ahhh, I forget so easily!

...Time, flowing like a riverrrrrrrr, to the sea, to the sea...

Well I been thru the desert on a horse with no name, it felt good to be out of the...rain?

Oh Well! Let me go to OFF or Standby mode! And pull-up the Screen Saver...!

Remember! Look Downstairs! No not there! The bottom of my POST!

How many links are there!!!!!!!!!!!!!!!

C'mon, give it to me!!!!!!

Huh, what, nobody, anybody?

OK, YOU GOT 5 MORE MINUTES PILGRIM!

All these search engines and websites that are available to us for learning, research and obscue things are there to help us. Let's not answer on a whim or personal experience. What worked for me may not be good for you. Hundreds upon hundreds of people have already worked out fundamental things for us. I may not be xpressing exactly what I mean, but the bottomline is let's research, gather the facts and point people to the source, the right direction which is to many; enlightening in many respects. We don't know it all...but we sure know where to go for good answers...I don't know, I'm not sure..., I seem to have the answer somewhere, give me some time to get it, I'll get back to you, later......with alternatives and variations, and well on and on...

Do you smile at yourself and check the hair whenever you pass by a mirror? (No need to answer, we all know what the correct answer is already....!) Mirror Mirror on the wall....

I'll not answer because I don't understand the question.

But, I assure you that next time I'll include cautionary and warning comments on all my POSTs. You have my word!

Sincerely

Ronald

I sense a Brown-out so I'll be printing this page because I feel I'll be needing it, and before it goes into total shut-down. I've been thru the whole thing a maybe saw one piece of cautionary advice, with a dash of "Good to go", and a bit of "GO-PHER-IT" like in "call me we'll do bizness". Anyway lets print this baby before there'a a Total Power Black-Out...!

I have done it before and have a few recommendations. I am NOT familiar with the scope you are using. You have mentioned that it is dual trace. I am going to ASSUME that the probes you use are similar to Tektronics probes, and that your scope has similar controls to Tek (and other) scopes.

1. Pull the ground wires off your scope probes and put them away in a drawer.

2. Find a button which says "Invert Channel A" or "Invert Channel B" and press it.

3. Find a button which says something like "Add A + B".

This sets up your scope to look at differential signals.

4. I assume that your probes are 10:1 aka 10 Mohm probes. You will have to set vertical gain on the scope to max voltage possible... and ALWAYS the gain on both channels must be the same for meaningful readings. If you don't have 10:1 probes, you might have to build a voltage divider as others have described.

5. Attach the A channel probe to the hot (black) side and the B channel probe to the neutral (white) side. Set your scope for Line sync and you should have a good picture of the voltage.

I CANNOT be with you to do it for you or to show you how, but this is dangerous if you don't know what you are doing. If the scope does not conform with what I described above, or if you have any question, DON"T DO IT.

I can assure you that 110VAC will blow the heck out of a scope probe ground wire before the circuit breaker blows. Did that back in 1970 (but only once).

Sincerely

Bill

I REFUSE RESPONSIBILITY FOR ANY LOSSES DUE TO THE ABOVE POST.

https://youtu.be/vOh2OSJ44eE

This answers all your questions