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S.W.A. Armour Earthing.

Which regulations(s) require the steel wire armouring of a S.W.A. cable to be earthed if it is NOT used as a circuit protective conductor?


Case 1. Cable buried underground.


Case 2. Cable NOT buried underground.


Z.
Parents

  • I disagree. A steel wire armouring which is part of a S.W.A. cable can NOT be touched as it is protected by a heavy duty P.V.C. oversheath. Therefore it is NOT an exposed conductive part. It simply is NOT exposed.


    If the cable in my case 2 has a copper core used as a C.P.C., then the regs. appear not to require the armouring to be earthed.



    Z.




    Well I guess that would come down to how the SWA was terminated - if the armour is cut back to the same line as the sheath, and oversleeved  with insulating sleeving that cannot be removed except by destruction at the end of the sheath, and the cable terminated on a simple plastic compression gland - the same at both ends then I would agree it can not be touched.  


    Jason.


Reply

  • I disagree. A steel wire armouring which is part of a S.W.A. cable can NOT be touched as it is protected by a heavy duty P.V.C. oversheath. Therefore it is NOT an exposed conductive part. It simply is NOT exposed.


    If the cable in my case 2 has a copper core used as a C.P.C., then the regs. appear not to require the armouring to be earthed.



    Z.




    Well I guess that would come down to how the SWA was terminated - if the armour is cut back to the same line as the sheath, and oversleeved  with insulating sleeving that cannot be removed except by destruction at the end of the sheath, and the cable terminated on a simple plastic compression gland - the same at both ends then I would agree it can not be touched.  


    Jason.


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