PSA regarding RMS

......and peak to peak is 340V.

@Robert_Kidd Thanks, corrected :)

Even people that understand rms screw up the peak to peak. Also 120v ac is more painful than 120v dc because of the peak and the peak to peak.

Be glad that you have a sine wave. If it was a different signal, you would not be able to calculate these things so easy...

@LeButch, That sounds very silly!

@LeButch I know, right?

Better off with the AC shock. The DC locks your muscle and you can't let go of the wire.

@Robert_Kidd ... hi... Good point. As a school kid (many years ago) we used to get transformers and compete with each other to see who could keep hold at increasing voltages. We were pretty good at it, and it was amusing to see muscles in the arm twitch and our fingers lock where we could not let go. Not to be advised for anyone reading this. (can't even play conkers these days without safety glasses etc). I hasten to add that we only ever used a 6v battery. How can that be d.c. some may ask ... well touching the 6v input wire on/off rapidly is different to a.c. flowing back and forth.

High voltage a.c. or d.c can be deadly ... avoid! (obligatory and sensible valid disclaimer). We also used to play on railway lines and put our ears on the tracks to hear when a train was coming! ... avoid! (obligatory and sensible valid disclaimer yet again)... trains were steam driven, slow and no electric lines in those days.

When I first started as an apprentice electrical engineer in industry training, we came across large metal switch gear which had been used for d.c. We had to tear it out and replace it with the a.c. modern gear which we had now started using... that was part of our daily job. I had a few a.c. shocks and so know the different feel to d.c. ... don't quite know how I am alive to tell the tale.

There are old electricians and there are bold electricians, there are not too many old bold electricians....🎲

Happy memories of foolish actions lol. We’ve all got them! I remember moving up the transformer winding as I needed more DC voltage from my circuit - forgetting about the smoothing capacitor working voltage. As soon as I switched power on the capacitor case shot through the suspended ceiling and capacitor contents rained down over me. I was only about one foot away from the circuit when it happened as I was monitoring the voltage.

In the relatively early days of colour tv I was asked to measure the EHT. I gingerly used a plastic rod to lift the edge of the anode cap on the back of the CRT and nervously moved the Fluke x1000 probe towards the anode cap. When I was about mid way the EHT arced from the anode cap to the end of the Fluke probe then down to the dag (the earthed coating on the rear of the CRT. I wasn’t hurt but it blew every bottom segment of the Fluke DMM LED display and the colour tv (which had been provided by the manufacturer as a test bed for LOPT’s) no longer worked. It had to be returned to manufacturer for repair or replacement. I’m much happier working with 12 volts but have completely rewired a few houses.

So yes, take great care with high voltages. Check & check again!

By the way, L.O.P.T. stands for Line Output Transformer which forms part of the circuit that generates the extra high tension (voltage), E.H.T., that. Is required for a CRT (cathode ray tube).