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We are building a system which will make use of a stainless steel junction box to connect different circuits within it. This will be located in a hazardous offshore environment so we will be using an Ex-e ATEX-rated junction box. There will be four single core cables entering the box via nickle plated brass ATEX-rated gable glands. The cables comprise the positive and negative returns of two separate 250A circuits.
I suspect eddy-current induced heating of the junction box may become an issue at this current load, but have no way of calculating this. Can anyone suggest a method by which we can understand what this heating load is likely to be?

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  • $\begingroup$ Aren't they rated? Could you use an aluminum or plastic version instead? $\endgroup$ – Jon Custer Aug 13 at 14:28

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