The IET is carrying out some important updates between 17-30 April and all of our websites will be view only. For more information, read this Announcement

Rules and Guidelines
Want to participate in the discussions? Please read our Community Rules and Guidelines. Need some help? Visit Support and Answers.

  • State Not Answered
  • Locked Locked
  • Replies 34 replies
  • Subscribers 31 subscribers
  • Views 11824 views
  • Users 0 members are here
Options
You may also be interested in
This discussion is locked.
You cannot post a reply to this discussion. If you have a question start a new discussion

Wall Cavity Wiring.

Zoomup
Good morning on this bright and sunny start,


                          Q. Which regulation(s) specifically prohibit(s) the installation of cables in brick and block cavity walls within the cavity?


in a, Older premises?


    b, Newer premises?


If regulations exist, what reasons are provided for the prohibition? Or are we just concerned about chemical damage of cable insulation if the cables are in contact with some types thermal insulation?


Z.
Parents
  • 0
    Mornin' Colin, Street light columns used to have a long length of 1.5mm2 T&E run from head to bottom with no internal supports for the cable with no problems. Surely 2 or 3 meters for a cable drop in a cavity won't strain it?


    Vertically run cables in a cavity may not bridge the cavity. Wall ties do.


    There is not always P.V.C. insulation involved. It may come later but we don't know that.


    And the regulation numbers are?


    Z.
Reply
  • 0
    Mornin' Colin, Street light columns used to have a long length of 1.5mm2 T&E run from head to bottom with no internal supports for the cable with no problems. Surely 2 or 3 meters for a cable drop in a cavity won't strain it?


    Vertically run cables in a cavity may not bridge the cavity. Wall ties do.


    There is not always P.V.C. insulation involved. It may come later but we don't know that.


    And the regulation numbers are?


    Z.
Children
No Data

Join us to get the best from IET EngX.

Joining EngX lets you personalise your experience so you stay up to date on the topics that interest you, plus you’ll be able to make connections who are looking to collaborate, exchange ideas and more.

Join us Not now

Community Rules & Guidelines