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Cattle deaths

lyledunn
Some 10 prize bullocks died in quick succession whilst housed over winter in a cattle shed. The government vet was unable to reach a conclusion on cause but apparently does not discount electric shock as an indirect cause. 

The shed comprises steel columns and trusses with corrugated iron sheeting over. The floor comprises re-Inforced concrete slats over the slurry tank. The pens have steel barriers supported by steel posts all of which are heavily corroded but still making contact with other albeit fortuitously.

The earthing system is TT with the shed steelwork on its own providing a substantially low impedance of 5 ohms using a loop tester. A 100mA RCD protects the rather ropey lighting circuits.defccf32df3c757507a0db6ad0a35f87-huge-a5af3537-8eae-4a3c-9126-68fa60b61ac7.jpg

whilst the floor could be wet, I can’t conceive how a voltage difference could be established even if the steelwork was at 230v

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    Many thanks for your input WB, it was over a short time period of a few weeks in winter 2017/2018. The common factor as far as the farmer was concerned was that the deaths followed a night of rain. You can see why he is then tying this to a possible electrical fault. Random positions in shed. Interestingly, most of the deaths occurred in the part of the shed that has a rubber covering over the floor slats but others occurred where there is no rubber covering. The shed roof is deliberately not continuous and with relatively open sides to both gable ends it must be a dreadful place in the middle of a cold wet winter!

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    Many thanks for your input WB, it was over a short time period of a few weeks in winter 2017/2018. The common factor as far as the farmer was concerned was that the deaths followed a night of rain. You can see why he is then tying this to a possible electrical fault. Random positions in shed. Interestingly, most of the deaths occurred in the part of the shed that has a rubber covering over the floor slats but others occurred where there is no rubber covering. The shed roof is deliberately not continuous and with relatively open sides to both gable ends it must be a dreadful place in the middle of a cold wet winter!

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