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 14 replies
  • Subscribers 34 subscribers
  • Views 2563 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

Ethernet cables in metal portioned walls

Stuart Urban

What are people's thoughts on achieving compliance with the below when installing ethernet/structured wiring cables in metal partitioned walls? 

Is ethernet SELV or PELV? If it is can we assume that everything that the structured wiring is used for will be SELV or PELV.

Parents
  • 0

    Ethernet has signals of a couple of volts peak to peak at the transmitter end, falling to about half that at the far end for the fastest sequence of 10101 that s supported, lower frequencies, such as 11001100 experience less loss. The idea that regs requiring an RCD apply to this would be  a disaster waiting to happen.

    Power over ethenet rides a current limited Dc between the two earth references of the line pairs on which the data is imposed, and in some designs on unused pairs as well. The normal power ADS considerations are not really suitable. I suggest that B7671 is the wrong standard, and those relating to network cabling are more suited.

    PSTN should be installed as per the BT SNs unless there is a good reason to deviate

    Mke

  • 0 in reply to mapj1

    110.1.2 (vii) specifically includes this in scope.

    Also, BS EN 50174-2 has HD 60364 as a normative reference.

Reply
  • 0 in reply to mapj1

    110.1.2 (vii) specifically includes this in scope.

    Also, BS EN 50174-2 has HD 60364 as a normative reference.

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