Basic insulation exposed in electrical outdoor meter box.

There’s debate about exposed basic insulation in meter cupboards being satisfactory or not? Industry guidance (WRAG) say it’s satisfactory if the door’s in good shape, what’s people views on this ?

Parents
  • How many of use would be content with exposed live parts in a meter box? (say a henley block with the cover absent or just 1" of bare copper showing at terminals)?

    If we accept that the meter box is an electrical enclosure, then it follow that the enclosure provides basic protection (from direct contact) as well as fault protection (that's what 416 says) therefore we must accept exposed live parts inside a undamaged meter box without code or comment - as it would comply completely with BS 7671 requirements.

    If however you think that point of view reduces to absurdity, I think we do well to question the initial assumption.

       - Andy. 

  • If we accept that the meter box is an electrical enclosure, then it follow that the enclosure provides basic protection

    I personally do not accept that the outdoor meter box is an electrical enclosure.  It is also my understanding the ESQR do not accept that the outdoor meter box is an electrical enclosure as they double insulate everything up to the meter. 

     - Risk of door being removed/severely damaged by bad weather or person making the term enclosure or cabinet compromised
     - Risk of Children or Disable/Lesser-abled person or mentally impaired person making contact.  Normally meter cabinet/cupboard height dependant
     - Risk of unskilled person or homeowner needing access to the content of meter cabinet for legitimate reasons like read meter or Isolation in the event of a fault or fire.
     - Risk of malicious intent like vandalism or common criminality  

     - Risk of external influences

Reply
  • If we accept that the meter box is an electrical enclosure, then it follow that the enclosure provides basic protection

    I personally do not accept that the outdoor meter box is an electrical enclosure.  It is also my understanding the ESQR do not accept that the outdoor meter box is an electrical enclosure as they double insulate everything up to the meter. 

     - Risk of door being removed/severely damaged by bad weather or person making the term enclosure or cabinet compromised
     - Risk of Children or Disable/Lesser-abled person or mentally impaired person making contact.  Normally meter cabinet/cupboard height dependant
     - Risk of unskilled person or homeowner needing access to the content of meter cabinet for legitimate reasons like read meter or Isolation in the event of a fault or fire.
     - Risk of malicious intent like vandalism or common criminality  

     - Risk of external influences

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