Advertisement
If you have a new account but are having problems posting or verifying your account, please email us on hello@boards.ie for help. Thanks :)
Hello all! Please ensure that you are posting a new thread or question in the appropriate forum. The Feedback forum is overwhelmed with questions that are having to be moved elsewhere. If you need help to verify your account contact hello@boards.ie

ET101 earth bonding - mechanical protection

Options
  • 12-06-2020 10:20am
    #1
    FabTec
    Registered Users Posts: 1 ✭


    Good morning,
    I'm looking for answers to these two questions about Ireland ET101 standards, since I can't seem to find specific indication:

    - Should the metal frame of a plasterboard wall /drywall positioned inside a room of a building be earthed as a main equipotential bonding?

    - Wirings positioned inside a wall at a depth of less than 5cm must have metal plate as mechanical protection, what thickness should this metallic plate have?

    Thank you


Comments

  • Options
    #2
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,596 Mod ✭✭✭✭2011


    FabTec wrote: »
    Should the metal frame of a plasterboard wall /drywall positioned inside a room of a building be earthed as a main equipotential bonding?

    It should remain unbonded in my opinion.


  • Options
    #3
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,596 Mod ✭✭✭✭2011


    FabTec wrote: »
    Wirings positioned inside a wall at a depth of less than 5cm must have metal plate as mechanical protection, what thickness should this metallic plate have?

    I do not believe that there is any requirement for a metal plate.


  • Options
    #4
    Risteard81
    Registered Users Posts: 2,567 ✭✭✭Risteard81


    Unnecessary bonding of parts which are not actually extraneous-conductive-parts can actually reduce the safety of the installation.


  • Options
    #5
    Chicoso
    Closed Accounts Posts: 122 ✭✭Chicoso


    Chicoso wrote: »
    522.8.14 covers it afaik

    522.8.14

    "Metal partitions concealing or traversed by wiring...must be bonded to the nearest protective conductor"


    Annex 52F covers this area in relation to metal partitions and protection of concealed wiring, it's mostly common sense


  • Options
    #6
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,596 Mod ✭✭✭✭2011


    Chicoso wrote: »
    522.8.14

    "Metal partitions concealing or traversed by wiring...must be bonded to the nearest protective conductor"

    You are correct.
    I have never seen this done to be honest so I had thought it was not a requirement. However it is generally fortuitously bonded via raised computer floor and / or ceiling grid.


  • Advertisement
  • Options
    #7
    Chicoso
    Closed Accounts Posts: 122 ✭✭Chicoso


    The other query about metal plates , there's no reference to that but there's rules on concealed wiring in bathroom zones and elsewhere, they're in the annex there

    Those rules don't come into play much ime as you're generally keeping concealed wiring back more than 50mm around bathroom zones

    Elsewhere you'd be conforming to standard runs for buried or recessed wiring


Advertisement