Cable calculations in gases other than air

Is there any sort of guidance regarding cable calculations ambient air temperature in gases other that air? I am currently looking at a cable calculation that requires a few cables to be run in a sealed argon environment which has a worse heat dissipation than air so the cable would run less efficiently. If anyone has had any experience with this advice or literature on this would be greatly appreciated. What correction factors did you use or if you didn't bother with correction factors what was your argument / evidence to support this? 

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  • Interesting one. Judging from what I recall of double glazing U value figures argon make a measurable but not huge difference - a lot less than say the same thickness of conventional solid thermal insulation (e.g. rockwool).- so if you need some numbers that are definitely erring on the safe side, maybe use the the ones for cables installed in an insulated wall or similar. If the cables are short and/or loads modest so the cost of possibly over sizing the cables is small then an approach like that might be a quick and easy solution. If the costs are more significant we might have to think again...

        - Andy.

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  • Interesting one. Judging from what I recall of double glazing U value figures argon make a measurable but not huge difference - a lot less than say the same thickness of conventional solid thermal insulation (e.g. rockwool).- so if you need some numbers that are definitely erring on the safe side, maybe use the the ones for cables installed in an insulated wall or similar. If the cables are short and/or loads modest so the cost of possibly over sizing the cables is small then an approach like that might be a quick and easy solution. If the costs are more significant we might have to think again...

        - Andy.

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