Why is electronics fine when places under oil but not on water?

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So I’ve seen some videos before where they literally put entire pc builds in oil and some machines work under oil (although I forgot what machines are those)

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Anonymous 0 Comments

Electronic components can work totally fine when submerged in specifically mineral oil. It’s often an option for cooling components that produce a ton of heat, since mineral oil does not conduct electricity like water does. Water also causes corrosion on electrical connections where mineral oil does not. Mineral oil is also used all throughout the electric grid to cool components. Those tin-can transformers you see on all the electric poles are all filled with mineral oil!

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