[Scoaster]

Today whilst attaching the positive lead on my 24v setup I felt some tingling on my arm where it was touching the vechile underbody.
I'm sure this isnt normal , any suggestions on how to track an issue down?

[scubadoo]

24VDC and sweaty hands can certainly be felt. Normal.

Even playing with 12V after an hour in the ocean can make you jump. Been there.

e.g. https://www.quora.com/Will-24V-DC-give-a-shock etc.

[Paul-Carter]

You made a path between the supply and ground. Be thankful it was not mains AC and take the lesson.

[mattn]

Connected electronics tend to have input capacitors. When connected they charge up, once connected draw not current. When you connect the battery though yourself, you fel the caps current need to charge those capacitors. Most installations also have a parasitic load of under 1AMP. Normally nothing to worry about, but if parking up for extended time its advisable to disconect the battery.

[Derb]

When an apprentice back before any electronics, on a hot humid day I used to get the odd tingle just off plain 12v DC. Other mates couldn’t feel it. Some of us are just good conductors .

[Rovers]

Check a 9v battery by putting the terminals on your tongue!

[mattn]

Done that... now I am a lot older and just a little wiser

[donu]

used to know a mechanic in Waiouri who would stop a vehicle [including V8's] by putting his arms along the spark plugs - I was there when he did it for the first time with one of these new fandangle electronic igntion cars came in, I believe that was the last time he did it and I still think he put a dent in the bonnett with his head.