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Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ.

Re: This is how I look at it.


1,000,000,000R/cm3=1,000R/cm=100R/mm. (Not 1R/mm, sorry wrong typing).

Your numbers make absolutely no sense whatsoever.

You go from 109 ohms/cm3 to 1,000 ohms/cm. What the hell's that supposed to mean? It's obviously not a cubic centimeter, but it can't be a square centimeter because then you have no thickness. You've divided the original number by one million. Where does that number come from?

It's nonsense.

If you want to scale it, you need to stick with three dimensions. One cubic centimeter is made up of 1,000 cubic millimeters. So you can also state the resistivity for cotton as 106 ohms/mm3.

So if the thickness of the cotton insulation is 1mm, then the resistance through an area of 1 square millimeter would be 1,000,000 ohms, not 100 ohms.

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