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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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    John Peckham:

    I wonder if the DNO are sure there is no underground cable fault present ?


    I think a long lead and a voltmeter testing between the supply earth and and exposed and extraneous parts would be a useful exercise kitted out with rubber boots for PPE. The and between exposed and extraneous  parts. Followed by the Capon test between a long screwdriver stuck in the ground and exposed and extraneous conductive parts.




    With ten dead bodies on the floor I think I might go for some dead testing first, rather than live testing. 


    Andy Betteridge 

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  • 0

    John Peckham:

    I wonder if the DNO are sure there is no underground cable fault present ?


    I think a long lead and a voltmeter testing between the supply earth and and exposed and extraneous parts would be a useful exercise kitted out with rubber boots for PPE. The and between exposed and extraneous  parts. Followed by the Capon test between a long screwdriver stuck in the ground and exposed and extraneous conductive parts.




    With ten dead bodies on the floor I think I might go for some dead testing first, rather than live testing. 


    Andy Betteridge 

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