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

  • State Helpful Answer
  • Locked Locked
  • Replies 9 replies
  • Subscribers 36 subscribers
  • Views 1466 views
  • Users 0 members are here
Options
You may also be interested in
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Boards

dcbwhaley

I have six plastic back boxes mounted an a wooden board which is spaced about 20mm from the wall.

Connections between the boxes will be out of the back, behind the board and back into another box.

Do the wires between the boxes, going behind the board need to be double insulated?

Parents
  • 0

    In practice of course, it will be fine in most cases.

    Regs wise it very much depends on how the board and wall are made, how rigid it all is, if it is good enough that you may consider it to create a partial enclosure such that a test finger could not reach the wires. A similar consideration applies to trunking with bits missing, or large holes in the covers, where unsheathed singles (singly insulated if you like) may be used inside the trunking so long as the enclosure is per 521.10 -  IP rating for  containment of  unsheathed cables. It says IP4X or IPXXD - but actually these are two quite different things, IPXXD relates to a test finger that is

    quite fat, while IP40 is more about wires.  Actually the IPXXD trunking spec is very lax, allowing bare wires out of finger reach, but personally I'd not be happy with that, but insulated singles should be OK if you cannot reach them,

    This old thread describes it quite well. 

    Mike.

Reply
  • 0

    In practice of course, it will be fine in most cases.

    Regs wise it very much depends on how the board and wall are made, how rigid it all is, if it is good enough that you may consider it to create a partial enclosure such that a test finger could not reach the wires. A similar consideration applies to trunking with bits missing, or large holes in the covers, where unsheathed singles (singly insulated if you like) may be used inside the trunking so long as the enclosure is per 521.10 -  IP rating for  containment of  unsheathed cables. It says IP4X or IPXXD - but actually these are two quite different things, IPXXD relates to a test finger that is

    quite fat, while IP40 is more about wires.  Actually the IPXXD trunking spec is very lax, allowing bare wires out of finger reach, but personally I'd not be happy with that, but insulated singles should be OK if you cannot reach them,

    This old thread describes it quite well. 

    Mike.

Children
No Data

Community Rules & Guidelines